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Installation requirements: For use in industrial environments of pollution class 2, overvoltage category II, at an altitude of up to 2000 metres above sea level, as Group 1, Class A industrial equipment. Installation in a flame-retardant, tool-accessible enclosure is required to meet EMC and safety requirements. Use zinc-plated yellow chrome steel DIN rails for grounding and avoid using other rail materials that may cause poor grounding.

Approved for use in hazardous areas
North America: Some modules (1794-OB8, 1794-OB8EP, 1794-OB16, 1794-OB16P) are approved for use in hazardous areas in North America. The products are labelled with a temperature code, and when combining devices, attention should be paid to the overall temperature code and local regulatory review. When operating in a hazardous area, it is strictly prohibited to disconnect or connect the device with electricity, and operations such as battery replacement should be performed in a non-hazardous area.
Europe: Some modules (1794-OB8, 1794-OB8EP, 1794-OB16, 1794-OB16P) are certified for use in potentially explosive atmospheres by Zone 2 Europe. When in use the equipment has to fulfil specific conditions, such as protection against UV rays, avoidance of voltage overruns, etc.

Module Installation
Preparation for Installation: The module should be mounted on a 1794 series terminal block, ensuring that no debris falls into the module prior to installation and that plugging or unplugging the module while it is energised may be hazardous.
Installation Procedure: Turn the key switch to position 2, make sure the Flexbus connector is fully extended, insert the module and align it with the notch for a secure installation.
Wiring Methods: Wiring methods vary between module models (1794-OB8, 1794-OB8EP, 1794-OB16, 1794-OB16P, 1794-OB32P). Output, power, and common wires need to be connected according to specific rules, and the power supply can be daisy-chained, and the total current must not exceed 10A.

Module Configuration
1794 – OB8EP Module: Configured by setting bits in the configuration word, fault bits can be programmed to detect faults, and faults can be reset by pushbuttons, programming, or cycling the backplane power.
Other modules (1794-OB8, 1794-OB16, 1794-OB16P, 1794-OB32P): Configuration by setting the bits in the configuration word (word 3).

Note
Zone Classification and Equipment Suitability: 1794-OB8 is suitable for use in North American Class I Division 2 Groups A, B, C, and D hazardous areas and European Zone 2 hazardous areas, but cannot be used in other hazardous area classifications. Hazardous area temperature codes are marked on the product nameplate. When using the product in a system combination, the most unfavourable temperature code (the lowest ‘T’ number) must be used to determine the overall system temperature code, and the combination of equipment must be reviewed by the local regulatory agency.

ELECTRICAL SAFETY OPERATIONS: Disconnecting equipment or connections while energised is strictly prohibited, and before operating in a hazardous area, you must either disconnect the power supply or ensure that the area is free of hazards. Plugging and unplugging modules under electrical power can cause arcing, which may result in an explosion, as well as wear and tear of the module and connector contacts, which can interfere with the normal operation of the equipment. When used in hazardous areas, prevent the rated voltage from exceeding the specified value due to transient disturbances, e.g. in European Zone 2 environments, take measures to ensure that transient disturbances do not cause the voltage to exceed 40% of the rated value.

Installation and earthing of the device: The device must be installed in a compliant enclosure with a minimum IP54 protection rating (required for European Zone 2 environments), with the interior accessible only by means of a tool, and with suitable flame retardancy to prevent the spread of flame. Use zinc-plated yellow chrome steel DIN rails for earthing, avoiding corrosive, oxidising or poorly conductive rail materials such as aluminium or plastic to prevent poor earthing. Securely fasten DIN rails to the mounting surface at intervals of approximately 200mm (7.8in.) and use end anchors where appropriate.
Component and connection management: Avoid changing components as this may affect the suitability of the equipment for use in hazardous areas. Ensure that all external connections are securely fastened by screws, slide latches, threaded connectors, etc.

Troubleshooting and maintenance: The 1794 – OB8 module outputs are not fused and it is recommended that they are protected externally by a SAN – O MQ4 – 800mA fuse. In the event of a module fault, for the 1794-OB8EP module, the fault can be reset by pressing the fault reset button on the front of the module, toggling the output reset bit (Write 1, Bit 08), or cycling the backplane power.

IMPORTANT INFORMATION AND SAFETY NOTE: Solid-state equipment has different characteristics than electromechanical equipment and should be used in a manner that ensures application compliance. Rockwell Automation is not responsible for consequential damages arising from the use of the equipment, and the contents of this manual may not be reproduced without permission. The manual contains a variety of safety tips, such as operating in hazardous environments, risk of electric shock, and more.

System Design and Hardware Installation
Design Steps: Designing a FlexLogix system involves determining the network configuration and component locations, and selecting the appropriate I/O devices, communication cards, controllers, power supplies, and software.
Hardware Installation: Installation steps include mounting DIN rails, power supplies, batteries, communication cards, and connecting serial ports. The installation process requires attention to grounding, use of appropriate cables, and adherence to specifications.

Network Communication
Supported Network Types: EtherNet/IP, ControlNet, DeviceNet, serial, DH-485 and third party networks are supported. Different networks have different communication methods, required software and hardware, and have different numbers of connections and configuration methods.
Data interaction: The controller can produce (broadcast) and consume (receive) data, as well as send and receive messages over the network. Connections need to be planned appropriately to optimise communication performance.

I/O Configuration and Management
Module Selection and Placement: Select the 1794 FLEX I/O modules according to your needs, determine their location in the local or distributed network, and select appropriate power supplies.
Configuration and Monitoring: To configure an I/O module, set parameters such as Request Packet Interval (RPI), Change of State (COS), communication format, and electronic keying. The I/O module status can be monitored through the programming software and the module can be reconfigured if necessary.

Application Development
Task and programme management: Scheduling and prioritising the execution of programmes using multiple tasks, with task types including continuous, cyclic and event tasks. Programs consist of tasks, program tags, master routines and other routines.
Programming and Monitoring: Supports multiple programming languages such as Ladder Diagram (LD), Function Block Diagram (FBD), Sequential Function Chart (SFC) and Structured Text (ST). Controller status and connection status can be monitored via GSV and SSV commands.
PhaseManager Configuration: PhaseManager provides a state model for the device, dividing the device’s operating cycle into different states and controlling state transitions through commands. It is used to meet specific system requirements, and different states and transitions have clear definitions and roles.
Battery Maintenance: Introduces battery storage, life estimation and replacement methods. Environmental conditions should be taken into account when storing batteries, warnings are given when batteries are low, they need to be replaced at the specified time, and specific precautions should be followed when replacing them.

System Status Indication and Backup
Status Indicators: Controller LEDs indicate the status of Run, Force, Battery, I/O, etc., reflecting system conditions through different colours and blinking patterns.
DeviceNet Backup: FlexLogix’s backup system on DeviceNet utilises shared master technology for fast switchover in the event of a controller failure. Backup systems have specific hardware and software requirements and need to be configured and programmed accordingly.

Technical Specification Parameters
Hardware Specifications
Processor and Memory: Equipped with a high-performance processor (such as the 5434 processor) and 512KB of user memory for storing user programmes and data, it can meet the storage requirements of a variety of industrial automation applications. When dealing with small equipment control programmes, it can stably store programme codes and data during operation.
Communication interface: 1 RS-232 serial port, supporting ASCII and DF1 protocols, can be used to connect barcode readers, operator terminals and SCADA systems. There are also two slots for installing 1788 communication cards, which can be used to communicate with Ethernet/IP, DeviceNet and ControlNet networks after installing the corresponding communication cards.

Electrical Specifications
Power Requirements: External 24V DC supply from 19.2 – 31.2V DC (including 5% AC ripple). CSA-compliant Separated Extra-Low Voltage (SELV) power supplies such as 1794 – PS3 or 1794 – PS13 are available to meet specific standards.
Current parameters: Input current max. 0.85A at 24V DC, max. 1.33A at 19.2V DC, Flexbus current output max. 653mA at 5.1V DC.
Power and Thermal Dissipation: Power dissipation is 25.5W at 19.2V DC and 20.4W at 24V DC; thermal dissipation is 87BTU/hour at 19.2V.
Isolation Voltage: Isolation voltage is 30V DC, after 850V DC test for 60s, it has good electrical isolation performance, which can effectively guarantee the safe operation of the system.

Environmental adaptability specifications
Temperature range: Operating temperature 0 – 60°C (32 – 140°F), non-operating temperature – 40 – 85°C (-40 – 185°F), can adapt to a certain range of temperature changes, and can work stably in the industrial field environment.
Humidity Requirements: Relative humidity requirements of 5 – 95% non-condensing, can operate normally in a wide range of humidity conditions, reducing failures caused by humidity problems.
Vibration and shock tolerance: can withstand a certain degree of vibration and shock, running vibration is 5g (10 – 500Hz), running shock is 30g, non-running shock is 50g, to adapt to the complex physical environment of the industrial site.

Other Specifications
Dimensions and Weight: Compact design for easy installation in small spaces, with specific dimensions of 7.87‘ (199.9mm) x 4.33’ (110mm) x 3.94’ (100mm) and weight of 2.2lbs (1.0kg) or 0.75kg.
Mounting: DIN rail or panel mounting, flexible mounting, you can choose the appropriate mounting method according to the actual application scenarios.
Certification: UL, CE and other industrial standards, in line with relevant safety and quality standards, can be used in different regions and industries.

IMPORTANT USER INFORMATION: Emphasises the differences between solid-state equipment and electromechanical equipment, use of this module is to ensure that the application complies with the requirements, Rockwell Automation is not responsible for consequential damages arising from the use of the equipment, and the manual examples are for reference only and may not be reproduced without permission. Also includes a variety of safety tips, such as operating in hazardous environments and protection against static electricity.
Installation requirements: For use in pollution class 2, overvoltage category II, industrial environments up to 2000 metres above sea level, Group 1, Class A industrial equipment. Installation in a flame-retardant, tool-accessible enclosure to fulfil EMC and safety requirements. Use zinc-plated yellow chrome steel DIN rails for grounding and avoid using other rail materials that may cause poor grounding.

Approved for use in hazardous areas
North America: This module is approved for use in hazardous areas in North America. The product is labelled with a temperature code and the overall temperature code and local regulatory review should be noted when combining devices. When operating in a hazardous area, electrical disconnections or connections are not permitted, and operations such as battery replacement must be performed in a non-hazardous area.
Europe: European Zone 2 approved for use in potentially explosive atmospheres. The device must be used in an enclosure of at least IP54 protection, protected from direct sunlight, protected from voltage overruns, and must have an ATEX approved backplate.

Module Installation
Preparation for Installation: The module must be used with either the 1794-TB3G or 1794-TB3GS terminal block. Ensure that no debris has fallen into the module prior to installation, and disable the keying function in the configuration file when replacing a Series A module with a Series B module.
Installation Procedure: Rotate the key switch to position 3, ensure the Flexbus connector is fully extended, insert the module and align it with the notch for a secure installation. Once installed, remove the end cap plug and connect additional terminal blocks if required.

Wiring and Grounding
Wiring: When connecting a two-wire transmitter device, the input, power, and common wires need to be connected according to specific rules, power supplies can be daisy-chained, and analogue and digital modules should be powered separately to minimise noise interference.
Grounding: All I/O wiring must be shielded and the shield must be externally grounded to the module, e.g. to a busbar or shielded ground feedthrough.

Module Configuration: Set module parameters such as byte order, data format, digital filters, alarm limits, etc. through the configuration mapping table. The data format is various and can be selected according to requirements. Different settings correspond to different functions and value ranges. The configuration in Series A mode is different from that in Series B mode, so it is necessary to pay attention to the applicable scenarios.

HART input data: HART input data contains the main variables of the device and other information, if the HART communication of the channel is disabled, the input data of the channel may be zero, HART input data word contains the communication status, device status, variable acquisition and other information, and each status bit has a clear meaning.

Status Indicators: The module is equipped with 8 red fault indicators, 8 yellow channel indicators and 1 green power indicator. Different indicator statuses reflect different working statuses of the module, such as blinking red indicates channel fault, green light indicates normal power supply, blinking green indicates no Flexbus communication, and yellow light indicates normal HART communication.

Basic Parameters
Number and type of inputs: 8 single-ended, non-isolated analogue input channels, suitable for analogue signal acquisition in various industrial scenarios.
Recommended Terminal Block: Adapted to 1794-TB3G and 1794-TB3GS terminal blocks, ensuring stable connection between the module and external devices.
Key switch position: fixed to 3, used to set the module’s working mode.
Enclosure type rating: None (open), to be installed in an additional protective enclosure to meet the protection requirements of the specific application environment.

Electrical parameters
Resolution and data format: resolution up to 16 bits, data format can be configured to support a variety of data representation to meet different measurement and control needs.
Conversion correlation: using the successive approximation method for conversion, can accurately convert analogue signals to digital signals.
Accuracy and anti-interference: Absolute accuracy of 0.1% full scale at 20°C (68°F), 0 – 55°C (32 – 131°F) accuracy drift of 0.05% full scale, with good stability. It has a certain ability to suppress interference signals of different frequencies, which can ensure the accuracy of the signal to a certain extent.
Input Characteristics: Input terminals are specifically numbered for connection to external signals. When the 24V DC power supply is removed, the input resistance becomes 10 kΩ.
Isolation and power supply: Isolation voltage is 50V (continuous), basic insulation type, tested at 850V DC for 1s to ensure electrical safety Flexbus current is 80 mA at 5V DC and 190 mA at 24V DC; power supply requirements are 24V DC (voltage range 19.2-31.2V DC with 5% AC ripple), powered by a 1794-PS13 power supply at 31.5V DC. The PS13 power supply has a maximum power consumption of 3.9W at 31.2V DC and a maximum thermal dissipation of 13.5BTU/hr.

Physical Parameters
Dimensions and Weight: Measures approximately 46.0 x 94.0 x 75.0mm (1.8 x 3.7 x 2.95in.) when mounted and weighs approximately 200g (7.05oz) for ease of installation in equipment layouts.
Indicator Lights: Equipped with 8 red fault indicator lights, 8 yellow channel indicator lights and 1 green power indicator light, which indicates the working condition of the module through different colours and statuses for easy monitoring.
Wire-related: Wire size is determined by the installed terminal block, shielded wires are used for signal ports, and the wiring category is Class 2 for both signal and power ports, which can be used for planning wire routing.

Environmental parameters
Temperature range: Operating temperature – 20 – 55°C (-4 – 131°F), storage temperature – 40 – 85°C (-40 – 185°F), can be adapted to a certain range of temperature changes .
Humidity and others: Relative humidity requirements of 5 – 95% non-condensing; able to withstand a certain degree of vibration and shock, vibration conditions for the 2g @ 10 – 500Hz, operating shock and non-operating shock of 15g; in terms of electromagnetic compatibility, in line with the relevant standards, such as CISPR 11 in the Group 1, Class A standards (with a suitable enclosure), the Electrostatic Discharge (ESD), radiation radio frequency (RF), electrical rapidity of （It is immune to electrostatic discharge (ESD), radiated radio frequency (RF), electrical fast transient pulse bursts (EFT/B), surge transients and conducted RF.

IMPORTANT USER INFORMATION: Solid-state equipment has different characteristics than electromechanical equipment and should be used in accordance with applicable safety guidelines to ensure application compliance. Rockwell Automation is not responsible for consequential damages arising out of the use of the equipment. The manual examples are for reference only and may not be reproduced without permission. The manual includes a variety of safety tips, such as operating in hazardous environments, risk of electric shock and burns, and more.
Installation requirements: For industrial environments in pollution class 2, overvoltage category II, up to 2000 metres above sea level, Group 1, Class A industrial equipment. Installation in a suitable enclosure which is flame retardant and accessible only by means of tools, with attention to electromagnetic compatibility. Use zinc-plated yellow chrome steel DIN rails for grounding, avoiding corrosive, oxidised or poorly conductive rail materials.

Hazardous area approvals
North America: The module is approved for use in hazardous areas in North America. The product is labelled with a temperature code, and when combining devices, attention should be paid to the overall temperature code and the local regulatory review, and it is strictly prohibited to electrically disconnect the device or make connections when operating in hazardous areas.
Europe: The module is approved for use in potentially explosive environments in Europe Zone 2, with additional requirements for use, such as UV protection, enclosure protection levels, and avoidance of voltage overruns.

Installation steps
Installation to Terminal Block: Install the module in the 1794 – TB3 or 1794 – TB3S terminal block, before installation, turn the key switch to position 3, make sure the Flexbus connector is fully extended, when inserting the module, pay attention to align the grooves and install it securely to prevent debris from falling into the module, as plugging and unplugging with electricity may be dangerous.
Wiring: Connect the input, signal return, power and common wires to daisy chain the power supply. Use shielded wires and connect them to functional ground, which varies for different types of transmitters.
Grounding: All I/O wiring must be shielded and the shield must be grounded on the outside of the module.

Module Configuration: Set module parameters such as byte order, digital filter, fault mode, HART current ratio, etc. through the configuration mapping table, different settings correspond to different functions and value ranges. There are various choices of data format, such as milliamps, percentage of full scale, etc. Some formats only support HART communication.
HART input data: HART input data contains the main variables and other information of the device, and HART communication can be disabled through configuration.HART input data word contains information of communication status, device status, variable acquisition, etc., and each status bit has a clear meaning.
Status Indicator: OK The status indicator is bicolour (red/green). Flashing green indicates that the module configuration word is zero, the 24V DC user power supply is off, or the module is in configuration mode; red indicates that the module has not passed the initial hardware test, and the module needs to be re-powered when the red indicator appears.

Basic Parameters
Number and type of inputs: 8 single-ended, isolated analogue input channels, which can effectively avoid inter-channel interference and is suitable for industrial scenarios requiring isolated inputs.
Recommended Terminal Block: For 1794-TB3 and 1794-TB3S terminal blocks to ensure stability and compatibility of the module with external devices.
Key switch position: 3, the module can be adapted to the corresponding operating mode by setting a specific key switch position.
Enclosure type rating: None (open), which means that the module can be used in an additional protective enclosure to meet the protection requirements of the specific application.
Electrical parameters
Resolution and Data Format: Resolution is 16-bit unipolar or 15-bit plus sign bit bipolar, with a current resolution of 0.320 µA/cnt in unipolar and 0.640 µA/cnt in bipolar. The data format supports engineering units, percentage full scale, and RAW/proportional counting to meet different data processing and display requirements.

Conversion related: Sigma Delta conversion type is adopted, and the conversion rate varies according to different settings, such as 4.17Hz, 10.0Hz, 16.7Hz, 19.6Hz, 62Hz, 470Hz, etc., in order to adapt to different measurement frequency requirements. Input current can be configured as 4 – 20mA or 0 – 20mA, output 0mA when not configured.
Accuracy and immunity: Absolute accuracy 0.1% full scale at 25°C, accuracy drift 0.4% full scale from 0 – 55°C. Under normal mode, it has high rejection ratio for current signals of different frequencies, and the common mode rejection ratio is more than 60dB at 50Hz and 60Hz, which has good anti-interference ability.

Input Characteristics: The input resistance is 249Ω ±1%, which can acquire the input signal stably. The maximum overload is 32mA continuous (one channel at a time) to ensure the safety of the module under certain overload conditions.
Isolation and power supply: Isolation voltage is 120V (continuous), basic insulation type, tested by 1000V AC for 60s, including isolation between user power supply and system, channel and system, and channel and channel.Flexbus current is 80mA @ 5V DC, used to supply power to the Flexbus interface of the module; maximum power consumption is 4.8W at 31.2V DC, and maximum heat dissipation is 16.4BTU. Maximum power consumption is 4.8W at 31.2V DC and maximum thermal dissipation is 16.4BTU/hr; external power supply requirements are 24V DC (19.2-31.2V DC with 5% AC ripple) and supply current is 190mA at 24V DC.

Physical Parameters
Dimensions: Measures approximately 94 x 94 x 66mm (3.7 x 3.7 x 2.6in.) when mounted for easy installation in a facility.
Indicator Lights: Equipped with 1 red/green power/status indicator light, which reflects the working status of the module through different colours and blinking status, e.g. blinking green indicates that the module’s configuration word is zero, the power is off, or it is in the configuration mode, while red indicates that it has not passed the initial hardware test.
Wire-related: Wire size is determined by the installed terminal block, shielded wires are required, wiring category is divided into signal port category 2, power port category 3, which can be used for planning wire routing, and the grounding conductor should be equal to or greater than the phase conductor.

Manual Overview and the FLEX I/O System
Manual Content and Purpose: Designed to guide the user through the use of the FLEX I/O analogue modules, covering installation, programming, and troubleshooting, this manual is intended for users who are able to operate Allen-Bradley programmable controllers and understand block transfer programming. The manual describes the FLEX I/O system components and the types of analogue modules that work together through adapters, terminal blocks and I/O modules, which are available in a variety of types to suit different applications.
The FLEX I/O system consists of adapters, terminal blocks and I/O modules. Adapters provide internal logic power for multiple I/O modules; terminal blocks are used for wiring two- or three-wire devices; and I/O modules contain bus interfaces and circuits to perform specific functions.

Analogue Module Installation
Prepare for installation: Calculate the power requirements of each module and ensure that the total current does not exceed 10A, otherwise a separate power supply is required. Confirm that the product complies with the EU directive, pay attention to static electricity protection during installation, and avoid removing or replacing the terminal blocks under charged conditions.
Installation steps: Installation includes mounting the terminal block (DIN rail or panel/wall mounting available), mounting the analogue module to the terminal block (note the key switch position and the Flexbus connector status), and connecting the wiring (wiring varies between modules and terminal blocks). Once the module is mounted, the green power indicator shows whether the module is powered on or not.

Module Programming: The module communicates with the processor via a bi-directional block transfer. Configuration Block Transfer Write (BTW) is used to set up the module functions and Block Transfer Read (BTR) is used to get the module information. The manual gives programming examples for the PLC-3, PLC-5 and PLC-2 processors, emphasising the need to pay attention to the order in which the modules are powered up, the creation of data files and the monitoring of status bits. The analogue data format is 12-bit resolution, left-justified to a 16-bit field, with the highest bit being a sign bit.

Module Configuration and Data Reading
Configuration method: When using the Remote I/O Adapter, module functions such as input/output range selection, safety status value selection, etc. are configured via block transfer write commands. The input channels can be configured with various voltage or current ranges and the output modules can be set with safety status values.
Data reading: Transfer module status and data to processor data table through block transfer read command. Read/write words and bit/word descriptions are different for different modules, which need to be operated according to specific modules.

DeviceNet Communication and Mapping
Communication structure: The DeviceNet Manager software is used to configure the FLEX I/O DeviceNet adapter and related modules. In the polled I/O structure, output data is received in module order, and input data is received first in the adapter status word and then in module order.
Data Mapping and Default Values: It introduces the data mapping methods of different analogue modules in DeviceNet, as well as the default values and real-time size settings of the modules. The default values are assigned by the adapter when the system is first powered up and there are no previous stored settings, and the I/O data size can be adjusted according to the requirements.

Safety and Use Precautions
Follow safety guidelines: Solid-state equipment has different operating characteristics than electromechanical equipment and should be used in accordance with the Safety Guidelines for the Application, Installation, and Maintenance of Solid-State Control Equipment (Publication SGI – 1.1) to ensure proper application of the equipment. Rockwell Automation is not responsible for consequential damages resulting from the use of the equipment. Manual examples are for reference only and may not be reproduced without permission.

Environmental and Installation Requirements: For use in industrial environments up to 2000 metres above sea level in Pollution Class 2, Overvoltage Category II, not for use in residential environments. To be installed in a suitable enclosure which is flame retardant and internally accessible only by means of tools. Use galvanised yellow chrome steel DIN rails for earthing, avoid corrosive, oxidised or poorly conductive rail materials, fix rails at 200mm intervals and use end anchors.

Electrostatic protection: The equipment is sensitive to static electricity and should be operated by touching an earthed object to discharge static electricity, wearing an earthed wrist strap, avoiding touching connectors and circuitry components, using an electrostatic safe workstation if available, and storing in electrostatic safe packaging when not in use.

Hazardous area use: There are specific approvals and requirements for use in Zone 2 in Europe and hazardous areas in North America. For example, for use in Europe, equipment must be protected against UV rays, enclosure protection levels, etc. For use in North America, products are labelled with a temperature code, and when combining equipment, the overall temperature code must be taken into account and reviewed by the local regulatory agency. When operating in hazardous areas, it is strictly prohibited to disconnect equipment or connections while energised to prevent the risk of explosion.

Module Installation
Mounting to Terminal Block: Mount the module to the 1794 – TB3 or 1794 – TB3S terminal block, turn the key switch to position 1 before mounting to ensure that the Flexbus connector is fully extended, insert the module into the groove with care and securely mount it to prevent debris from falling into the module, as an electrically charged plug or unplug may cause an explosion.
Wiring: Connect the input lines (A +, A -, B +, B -, Z +, Z -, G +, G -), the encoder common, the signal shield, the encoder power supply line, the +V DC power supply and the DC return to daisy-chain the power supply. The wiring method varies for different terminal blocks, so you need to refer to the corresponding tables and diagrams for operation.
Module Configuration: Configure the module functions by setting the control words, such as counting mode, preset function, calibration function, gate control function, memory control function, etc. Control words 0 and 1 are used to set the channel function, and control word 2 is used to set the filter function.

Specification
Basic parameters
Number of inputs and outputs: 2 input channels, 4 inputs (A, B, Z and G) for each counter.
Recommended terminal blocks: For 1794-TB3, 1794-TB3S, 1794-TBN, 1794-TBKD, 1794-TB37DS and others.
Key switch position: 1.
Enclosure type rating: None (open), meaning that it is used in an additional protective enclosure to meet the protection requirements of the specific application.
Electrical parameters
Input Characteristics: Input pulse width minimum 2μs to be recognised; maximum counting frequency 100kHz; on-state voltage min. 6V DC, max. 26.4V DC (24V DC +10%), current min. 3mA @ 6V DC, nominal 9mA @ 12V DC, max. 15mA @ 24V DC; off-state voltage min. 26.4V DC, max. 3V DC.
Isolation and Power Supply: Isolation voltage tested at 500V AC for 60s; FlexBus current 5mA @ 5V DC; Maximum power consumption 5W @ 26.4V DC, maximum thermal dissipation 17.1BTU/hr @ 26.4V DC; External power supply requirements 12 – 24V DC (+10%), supply current 150mA at 12V DC, 75mA at 24V DC. Power supply current is 150mA at 12V DC and 75mA at 24V DC.

Physical Parameters
Dimensions: Mounted dimensions are 46 x 94 x 53mm (1.8 x 3.7 x 2.1in.) for easy layout and installation in equipment.
Indicators: 1 green/red power/status indicator and 12 yellow status indicators are provided to indicate the operating status of the module.
Conductors: Belden 8761 is recommended for input conductors up to 304.8m (1000ft.); wiring category 2 for planning conductor wiring.

Environmental parameters
Temperature Range: Operating temperature 0 – 55°C (32 – 131°F), but be careful not to connect the maximum input voltage to all inputs at the same time when the module ambient temperature is expected to exceed 40°C; Storage temperature – 40 – 85°C (-40 – 185°F).
Humidity and other: Relative humidity requirements are 5 – 95% non-condensing; capable of withstanding a certain level of vibration and shock, with vibration conditions of 5g @ 10 – 500Hz, 30g for operational shock, 50g for non-operational shock; in terms of EMC, conforms to the relevant standards, such as the Class A standard in CISPR 11 (IEC 61000-6-4) (with a suitable enclosure), and has a good understanding of the electrostatic discharge (ESD), radiated radio frequency (RF) (-40 – 185°F) and the electromagnetic compatibility (EMC). ESD, RF, EFT/B, surge transients and conducted RF.
Certifications: c-UL-us, CE, EAC, RCM, etc. certified. The c-UL-us certification indicates that the product complies with the U.S. and Canadian industrial control equipment standards and is suitable for use in hazardous locations; the CE certification complies with the relevant European Union EMC Directive; the EAC certification complies with the Russian Customs Union’s EMC technical regulations; the RCM certification complies with the Australian Radiocommunications Act, and the details of the certifications can be viewed through the product certification link.

Safety and Use Precautions
Follow safety guidelines: Solid-state equipment has different operating characteristics than electromechanical equipment and should be used in accordance with the Safety Guidelines for the Application, Installation, and Maintenance of Solid-State Control Equipment (Publication SGI – 1.1) to ensure proper application of the equipment. Rockwell Automation is not responsible for consequential damages resulting from the use of the equipment. Manual examples are for reference only and may not be reproduced without permission.

Environmental and Installation Requirements: For use in industrial environments up to 2000 metres above sea level in Pollution Class 2, Overvoltage Category II, Group 1, Class A industrial equipment. To be installed in a suitable enclosure which is flame retardant and internally accessible only by means of tools. Use zinc-plated yellow chrome steel DIN rails for grounding, avoid corrosive, oxidised or electrically non-conductive rail materials.

Electrostatic protection: The equipment is sensitive to static electricity and should be operated by touching a grounded object to discharge static electricity, wearing a grounded wrist strap, avoiding touching connectors and circuitry assemblies, using a static-safe workstation when available, and storing in static-safe packaging when not in use.

Hazardous area use: There are specific approvals and requirements for use in Zone 2 in Europe and hazardous areas in North America. For example, for use in Europe, the equipment must be protected from UV rays and avoid open circuits on the secondary side of the current transformer; for use in North America, the product is labelled with a temperature code, and when combining the equipment, the overall temperature code must be taken into account and reviewed by the local regulatory agency. When operating in hazardous areas, it is strictly prohibited to disconnect equipment or connections while energised to prevent the risk of explosion.

Module Mounting
Mounting to Terminal Block: 1794 – IB10XOB6 modules are mounted to 1794 – TB3 or 1794 – TB3S terminal blocks, 1794 – IB16XOB16P modules are mounted to 1794 – TB32 or 1794 – TB32S terminal blocks. Ensure that the Flexbus connector is fully extended by rotating the key switch to position 2 before installation. Insert the module into the groove with care and install it securely to prevent debris from falling into the module, as an electrically charged insertion or removal could result in an explosion.
Wiring: The 1794-IB10XOB6 and 1794-IB16XOB16P modules are wired differently, so you need to follow the corresponding wiring diagrams to connect the input wires, output wires, power supply wires, and common wires, and you can daisy-chain the power supply.

Module Configuration: Configure the module by setting the bits in the configuration word (word 3), mainly to set the input filter time. The setting range of input filtering time is different for different modules, 0 – 9 for 1794 – IB10XOB6 and 0 – 15 for 1794 – IB16XOB16P, which corresponds to different filtering lengths, and can be adjusted according to the actual requirements.

Number and type of inputs and outputs
1794 – IB10XOB6: 10 inputs, current-flooding type; 6 outputs, current-pull type.
1794 – IB16XOB16P: 16 inputs, current-flooding type; 16 outputs, current-pull type.

Electrical Parameters
Input Characteristics
Voltage Range: The minimum on-state voltage of both modules is 10V DC, the nominal value is 24V DC, the maximum value is 31.2V DC, and the maximum off-state voltage is 5V DC.
Current Range: 1794 – IB10XOB6 input on-state current is 2.0mA minimum, 8.0mA nominal, and 11.0mA maximum; 1794 – IB16XOB16P input on-state current is 2.0mA minimum, 8.8mA nominal, and 12.1mA maximum; and the maximum value of both modules’ input off-state current is 1.5mA.
Input Impedance: The nominal input impedance of the 1794-IB10XOB6 is 4.8kΩ and that of the 1794-IB16XOB16P is 2.5kΩ.

Output Characteristics
Voltage Range: The output on-state voltage range is 10V DC minimum, 24V DC nominal, 31.2V DC maximum for the 1794-IB10XOB6, and the maximum for the 1794-IB16XOB16P as shown in the derating curve. Off-state voltage max. is 31.2V DC for all values.
Current range: 1794 – IB10XOB6 output on-state current per channel min. 1.0mA, max. 2.0A, total module current max. 10A; 1794 – IB16XOB16P output on-state current per channel min. 0.5A, max. 0.5A, total module current max. 8A.
Other parameters: 1794 – IB10XOB6 inrush current is 4A for 50ms, repeatable every 2s; 1794 – IB16XOB16P inrush current is 1.5A for 50ms, repeatable every 2s. The maximum off-state leakage current for both modules is 0.5mA. The maximum on-state voltage drop for the 1794-IB10XOB6 is 1V DC at 2A and 0.5V DC at 1A; the maximum on-state voltage drop for the 1794-IB16XOB16P is 0.5V DC at 1A.

Safety and Use Precautions
Follow Safety Guidelines: Solid-state equipment has different operating characteristics than electromechanical equipment and should be used in accordance with the Safety Guide for the Application, Installation, and Maintenance of Solid-State Controls, Publication SGI-1.1, to ensure proper application of the equipment. Rockwell Automation is not responsible for consequential damages resulting from the use of the equipment. Manual examples are for reference only and may not be reproduced without permission.

Environmental and Installation Requirements: For use in industrial environments up to 2000 metres above sea level in Pollution Class 2, Overvoltage Category II, Group 1, Class A industrial equipment. To be installed in a suitable enclosure, which should be flame retardant and internally accessible only by means of tools. Use zinc-plated yellow chrome steel DIN rails for grounding, avoid corrosive, oxidised or electrically non-conductive rail materials, fix the rails at 200mm intervals and use end anchors.
Electrostatic protection: The equipment is sensitive to static electricity. When operating, touch an earthed object to discharge static electricity, wear an earthed wrist strap, avoid touching connectors and circuitry assemblies, use an electrostatic safe workstation if available, and store the equipment in suitable electrostatic safe packaging when not in use.

Hazardous area use: There are specific approvals and requirements for use in Zone 2 in Europe and hazardous areas in North America, such as the need to install the equipment in an enclosure with at least IP54 protection for use in Europe, labelling of the product with a temperature code for use in North America, and consideration of the overall temperature code when combining the equipment and reviewing it with the local regulatory agency. Also, when operating in hazardous areas, it is strictly prohibited to disconnect equipment or connections while energised to prevent the risk of explosion.
Electrical Safety: To comply with the CE Low Voltage Directive (LVD), the equipment must be powered from a source that complies with Safety Extra Low Voltage (SELV) or Protection Extra Low Voltage (PELV).

Module Installation
Mounting to Terminal Block: Mount the module to the 1794 series terminal block, turn the key switch to position 2 before mounting to ensure that the Flexbus connector is fully extended, take care when inserting the module that it is aligned with the grooves and securely mounted to prevent debris from falling into the module, as an electrically charged insertion or removal could result in an explosion.
Wiring: 1794 – IB8, 1794 – IB16, and 1794 – IB16K are wired using 1794 – TB3 or 1794 – TB3S terminal blocks; 1794 – IB32 is wired using 1794 – TB32 or 1794 – TB32S terminal blocks. Connect the input, power and common wires according to the corresponding wiring table to daisy-chain the power supply.
Module Configuration: Configure the input module by setting the bits in the configuration word, mainly to set the input filter time. The setting range of input filter time is different for different modules, such as 0 – 7 for 1794 – IB8, 0 – 11 for 1794 – IB16 (12 – 15 for some of them), and 0 – 31 for 1794 – IB32, which corresponds to different filtering lengths, and can be adjusted according to the actual demand.

Specification
Input Characteristics
| Module Model | 1794 – IB8|1794 – IB16|1794 – IB16K|1794 – IB32
| – – – – – – – – – – – – – – – – – – –
| Number of inputs | 8 | 16 | 32 |
| Input Type | Non-Isolated, Current-Flooded | Non-Isolated, Current-Flooded | Non-Isolated, Non-Isolated in Group, Current-Flooded |
| Recommended Terminal Block | 1794 – TB3, 1794 – TB3S|1794 – TB3, 1794 – TB3S|1794 – TB32, 1794 – TB32S|
| On-state voltage (V DC)| Minimum 10, Nominal 24, Maximum 31.2 | Minimum 10, Nominal 24, Maximum 31.2 | Minimum 19.2, Nominal 24, Maximum 31.2|
| On-state current (mA)| 2.0 minimum, 8.0 nominal, 12.0 maximum | 2.0 minimum, 8.0 nominal, 12.0 maximum | 2.0 minimum, 4.1 nominal (at 24V DC), 6.0 maximum | Off-state voltage (VDC) | 10 minimum, 24 nominal, 31.2 maximum | 19.2 minimum, 24 nominal, 31.2 maximum
| Off-state voltage (V DC)| 5.0 max.
| Off-state current (mA)| 1.5 max.
| Input impedance (kΩ)|4.6|4.6|6.0|

Electrical Performance Parameters
Isolation Voltage: All 50V (continuous), basic insulation type, but with different test conditions. 1794 – IB8 tested at 850V DC for 60s, 1794 – IB16 and 1794 – IB16K tested at 707V DC for 60s, and 1794 – IB32 tested at 2121V DC for 2s with no isolation between individual channels of each module.
FlexBus Current: 20mA @ 5V DC for the 1794-IB8, 30mA @ 5V DC for the 1794-IB16 and 1794-IB16K, and 25mA @ 5V DC for the 1794-IB32, which is used to power the module’s FlexBus interfaces and to ensure that power is available for communication with other devices.
Power Consumption and Thermal Dissipation: 1794 – IB8 3.5W @ 31.2V DC and 11.9BTU/hr @ 31.2V DC; 1794 – IB16 and 1794 – IB16K 6.1W @ 31.2V DC and 20.8BTU/hr @ 31.2V DC; 1794 – IB32 6.0W @ 31.2V DC; 1794 – IB32 6.0W @ 31.2V DC. 6.0W @ 31.2V DC, maximum thermal dissipation 20.5BTU/hr @ 31.2V DC, reflecting the module’s energy consumption and heat dissipation during operation.

Physical Characteristics
Dimensions: The mounted dimensions are 94 x 94 x 69mm (3.7 x 3.7 x 2.7in.), allowing for easy installation in control cabinets and other equipment.
Indicators: The 1794-IB8 has 8 yellow status indicators, the 1794-IB16 and 1794-IB16K have 16 yellow status indicators, and the 1794-IB32 has 32 yellow status indicators to indicate the status of the input devices, allowing the user to monitor module operation.
Terminal Screw Torque: Determined by the mounted terminal block, it ensures firm wiring and avoids problems such as poor contact and unstable signal transmission due to loose screws.

IMPORTANT USER INFORMATION: Solid-state equipment has different characteristics than electromechanical equipment and should be used in accordance with applicable safety guidelines. Rockwell Automation is not responsible for consequential damages arising from the use of the equipment, and the manual examples are for reference only and may not be reproduced without permission. Includes a variety of safety tips, such as operating in hazardous environments, risk of electric shock and burns, and more.
Installation requirements: For use in industrial environments of pollution class 2, overvoltage category II, at altitudes up to 2000 metres above sea level, as Group 1, Class A industrial equipment. Installation in a specific enclosure that is flame retardant and accessible only by means of tools, with attention to electromagnetic compatibility.

Approval for use in hazardous areas
Europe: 1794 – IB8, 1794 – IB16 are approved for use in Zone 2 in Europe with additional requirements such as UV protection, enclosure protection level, avoidance of voltage overruns, etc.
North America: 1794 – IB8, 1794 – IB16, 1794 – IB32 approved for use in North American hazardous areas. Products are labelled with a temperature code, and when combining devices, attention should be paid to the overall temperature code and local regulatory review.

Installation Procedure
Installation to Terminal Block: Rotate key switch to ensure Flexbus connector is fully extended, align module with terminal block recesses, insert and securely install, taking care to prevent debris from falling into the module and possible hazards associated with energised plugs and unplugs.
Wiring: Use 1794-TB3 or 1794-TB3S terminal blocks for 1794-IB8 and 1794-IB16, and 1794-TB32 or 1794-TB32S terminal blocks for 1794-IB32 to connect the input wires, power wires, and common wires according to the corresponding wiring diagrams, respectively, and to daisy-chain the power supply.
Configure Input Module: Configure the input module by setting the bits in the configuration word, mainly to set the input filter time. The input filtering time setting range is different for different modules, such as 0 – 7 for 1794 – IB8, 0 – 11 for 1794 – IB16 (12 – 15 for some of them), and 0 – 31 for 1794 – IB32, which corresponds to different bit settings.

Input Characteristics
| Module Model | 1794 – IB8|1794 – IB16|1794 – IB32|
| Number of Inputs | 8-way | IB8 | 1794 – IB16 | 1794 – IB32 | 1794 – IB32
| Number of Inputs | 8 | 16 | 32 |
| Input Type | Current, Pour Current | Current, Pour Current | Current, Pour Current | Current, Pour Current | Current, Pour Current
| Recommended Terminal Blocks | 1794 – TB3, 1794 – TB3S, 1794 – TB3K, 1794 – TB3SK, 1794 – TBKD, 1794 – TB37DS|1794 – TB3, 1794 – TB3S, 1794 – TB3K, 1794 – TB3SK, 1794 – TBKD, 1794 – TB37DS |1794 – tb32, 1794 – tb32s, 1794 – tb62ds, 1794 – tb62exd4x15|, 1794 – tb62exd4x15
|On-state voltage (V DC)| Minimum 10, Nominal 24, Maximum 31.2 | Minimum 10, Nominal 24, Maximum 31.2 | Minimum 19.2, Nominal 24, Maximum 31.2 | On-state current (mc)
| On-state current (mA)| 2.0 minimum, 8.0 nominal, 12.0 maximum | 2.0 minimum, 8.0 nominal, 12.0 maximum | 2.0 minimum, 4.1 nominal (at 24V DC), 6.0 maximum | Off-state voltage (VDC) | 10 minimum, 24 nominal, 31.2 maximum | 19.2 minimum, 24 nominal, 31.2 maximum
| Off-state voltage (V DC)| 5.0 max.
| Off-state current (mA)| 1.5 max.
| Nominal Input Impedance (kΩ)|4.6|4.6|22.2

Electrical Performance Parameters
Isolation Voltage: All 50V (continuous), basic insulation type, but with different test conditions. 1794 – IB8 tested at 850V DC for 60s, 1794 – IB16 tested at 707V DC for 60s, and 1794 – IB32 tested at 2121V DC for 2s with no isolation between individual channels of each module.
FlexBus Current: 20mA @ 5V DC for the 1794 – IB8 and 30mA @ 5V DC for both the 1794 – IB16 and 1794 – IB32 is used to power the module’s FlexBus interfaces and to ensure that power is available for communication with other devices.

Power Consumption and Thermal Dissipation: 1794 – IB8 consumes 3.5W @ 31.2V DC with a maximum thermal dissipation of 11.9BTU/hr @ 31.2V DC; 1794 – IB16 consumes 6.1W @ 31.2V DC with a maximum thermal dissipation of 20.8BTU/hr @ 31.2V DC; 1794 – IB32 consumes 6.0W @ 31.2V DC with a maximum thermal dissipation of 20.0V DC; 1794 – IB32 consumes 6.0W @ 31.2V DC with a maximum thermal dissipation of 20.8BTU/hr. DC, maximum thermal dissipation 20.47BTU/hr @ 31.2V DC , reflecting the module’s energy consumption and heat dissipation during operation.
Physical specification parameters: the document does not explicitly mention the module size, weight and other specific physical dimensions of the parameters, but mentioned that the type of enclosure is none (open), the protection performance is dependent on the installation of the shell to achieve, and gives the conductor category of the signal port 2, used to guide the wiring planning.

Environmental suitability parameters
Temperature range: – 20…55°C (-4…131°C) for the 1794-IB8 and 1794-IB16, 0…55°C (32…131°F) for the 1794-IB32; storage temperature are – 40…85°C (-40…185°F), reflecting the range of operating and storage temperatures tolerated by the different modules.

Humidity and others: Relative humidity requirements are 5…95% non-condensing; for vibration, 5g @ 10 – 500Hz during operation; for shock, 30g during operation and 50g during non-operation, demonstrating the modules’ ability to adapt to different environmental conditions.
Electromagnetic compatibility: comply with CISPR 11 Group 1, Class A standard (need to be suitable for the shell), with a certain degree of immunity to electrostatic discharge (ESD), radiated radio frequency (RF), electrical fast transient pulse group (EFT/B), surge transients and conducted radio frequency, etc., but there are differences in the specific frequency range of the immunity of different modules in the radiated RF, to ensure the stability of operation in the complex electromagnetic environment. operation in complex electromagnetic environments.

Certification parameters: Passed c-UL-us, CSA, CE and many other certifications, and the details of different module certifications are different. Such as c-UL-us certification indicates that the product meets the U.S. and Canadian industrial control equipment standards and is suitable for hazardous locations; CSA certification involves process control equipment and hazardous locations; CE certification in line with the relevant European Union EMC Directive, you can check the details of the certification information through the website.

Installation requirements: The equipment is suitable for use in industrial environments of pollution class 2, overvoltage category II, at altitudes up to 2000 metres above sea level, and is classified as Group 1, Class A industrial equipment. It is to be installed in a suitably designed enclosure that is flame retardant and the interior can only be accessed by means of tools.

Installation steps
Mounting to DIN rail: Hook the rear of the adapter onto the top of the 35 x 7.5 mm DIN rail, rotate and press it against the rail, if not locked it can be done with a tool.
Replacing the adapter in an existing system: Remove the relevant connections in turn, take care to align the slots when installing the new adapter, and reconnect the wiring once the installation is complete.

Wiring Methods
Network cable connection: Connect the Ethernet network cable to the RJ45 connector on the bottom of the adapter, it is recommended to connect it through a 100 MB full duplex switch.
Power Connection: 24V common is connected to the left terminal B of the upper connector, +24V dc input power is connected to the left terminal C of the lower connector, and power can be supplied to the subsequent modules through connectors D and E. No more than 2 wires should be connected to a single terminal, and the terminal screws should be torqued to 0.8 Nm (7 lb – in) when connecting.
Network Address Settings: The adapter is shipped from the factory with the jog wheel switch set to 999 and DHCP enabled, allowing you to obtain an IP address using the jog wheel switches (001 – 254), a DHCP server, or from non-volatile memory. A switch value of 888 resets all configuration parameters to factory settings.

Indicator Status Interpretation: 1794 – The AENT adapter has three two-colour indicators on the front panel, the Module Status Indicator, the Network Status Indicator, and the Link Status Indicator, with different blinking or always-on statuses representing different operating states.
Environmental specifications: Operating temperature 0 – 55°C (32 – 131°F), non-operating temperature – 40 – 85°C (-40 – 185°F), relative humidity 5 – 95% non-condensing, able to withstand a certain degree of vibration and shock, in the electromagnetic compatibility requirements.

Specification
Electrical Parameters
Power Requirements: To comply with the CE Low Voltage Directive (LVD), the unit needs to be powered by a Safety Extra Low Voltage (SELV) or Protection Extra Low Voltage (PELV) compliant power supply. The input voltage is rated at 24V dc nom, and the input voltage range is 19.2-31.2V dc (including 5% AC ripple), which can adapt to a certain range of voltage fluctuations and ensure stable operation under different power conditions.
Communication rate: It supports 10/100 Mbps communication rate, which can be negotiated automatically according to the network environment and equipment requirements to meet the data transmission speed requirements in industrial automation scenarios and ensure fast and stable data transmission.

Current and Power: The maximum output current of Flexbus is 640 mA, which can provide stable power support for the connected I/O modules. In terms of power consumption, the maximum is 550 mA and 440 mA at 24V dc; the power dissipation is 7.3 W at 19.2V dc and the heat dissipation is 24.9 BTU/hr at 19.2V dc, which reflects the energy consumption and heat dissipation of the device during operation.
Isolation Voltage: 50V continuous isolation voltage, which belongs to the basic insulation type and has been tested by 1000V ac for 60s (between power supply and Flexbus, EtherNet), effectively isolating different circuits and enhancing the safety and anti-interference ability of the equipment.
Mechanical Parameters
I/O capacity: I/O capacity is 8 modules, which specifies the upper limit of the number of FLEX I/O modules that can be connected to the adapter, and the number of I/O points and the scale of equipment connection should be planned accordingly in the system design.
Connector Type: The Ethernet connector adopts the RJ45 Cat. 5 standard interface, which is widely used for Ethernet connection with good versatility and stability, and is convenient to connect with other network devices.

Terminal Screw Torque: The terminal screw torque is required to be 0.8 Nm (7 lb – in), which ensures firm wiring and avoids problems such as poor contact and unstable signal transmission caused by loose screws.
Wire Specifications: Power conductors are 0.34 – 2.5 mm² (22 – 12 AWG) stranded copper wire rated at 75°C (167°F) or higher, with a maximum insulation thickness of 1.2 mm (3/64 in.) to meet electrical performance and safety requirements. Conductors are classified as Class 1 for power ports and Class 2 for communication ports to provide guidance for wiring planning.

Environmental Parameters
Temperature range: Operating temperature range is 0 – 55°C (32 – 131°F), non-operating temperature range is – 40 – 85°C (-40 – 185°F), can adapt to a variety of industrial environment temperature changes, in different seasons and working scenarios to maintain stable performance.
Humidity Requirements: Relative humidity range of 5 – 95% and non-condensing, can work normally in a certain humidity environment, to avoid humidity problems affecting the electrical performance and service life of the equipment.

Vibration and shock: able to withstand a certain degree of vibration and shock, working vibration conditions for 5 g @ 10 – 500 Hz, working shock for 30 g, non-working shock for 50 g, to adapt to the vibration and shock environment of the industrial site, to ensure the reliability of equipment operation.
Electromagnetic compatibility: Strict requirements in electromagnetic compatibility, such as compliance with CISPR 11 Group 1, Class A standards, electrostatic discharge (ESD), radiation radio frequency (RF), electric fast transient pulse group (EFT/B), surge transients, etc. have a certain immunity, reduce the impact of electromagnetic interference on the equipment, to ensure stable operation in a complex electromagnetic environment.

Other parameters
Enclosure type rating: Enclosure type rating for no (open), meaning that it needs to be installed in a suitable protective enclosure to adapt to the specific use of the environment, such as dust-proof, waterproof, anti-electromagnetic interference and so on.
North American temperature code: North American temperature code is T4A, which indicates the temperature limit and safety level when the equipment is used in hazardous places in North America, and helps users to choose the right equipment in a specific area and ensure safe use.