CPUM and IOCN are Vibro Meter under Meggitt Sensing Systems ®  The core components of the VM600 series mechanical protection system (MPS) and condition monitoring system, which work together to achieve configuration management, signal monitoring, alarm control, and external device communication for VM600 racks, are suitable for harsh industrial scenarios such as aviation, energy, and heavy machinery.

Core functions and features

1. System configuration and control (CPUM core role)

One click configuration: VM600 MPSx software can be run on an external computer (laptop, industrial PC), and all VM600 cards can be configured with one click via Ethernet or RS-232 serial port.

Rack Control Center: As the “rack controller”, it establishes an Ethernet connection between the VM600 rack and the computer running MPSx software (MPS1/MPS2), and manages all cards in the rack uniformly.

Local monitoring and operation: The front panel is equipped with an LCD micro display screen, which displays the selected monitoring output values in the form of bar charts and numbers, while marking the Alert and Danger thresholds; Support switching monitoring signals through SLOT and OUT buttons, and reset the full rack lock alarm and associated relays with ALARM RESET button.

2. Multi interface communication and redundancy design

Rich communication interfaces: CPUM comes standard with 2 Ethernet interfaces and 2 serial ports (RS-232/RS-422/RS-485), and can be optionally equipped with a serial communication module to expand with an additional 2 isolated RS-422/RS-485 interfaces, supporting up to 3 serial ports working simultaneously.

Redundancy guarantee: configurable redundant communication links (Ethernet redundancy, serial port redundancy) to enhance system availability; For example, dual Ethernet is used for primary/backup Modbus TCP communication, and dual serial ports are used for primary/backup Modbus RTU communication.

Third party device compatibility: Supports industrial standard protocols (Modbus RTU, Modbus TCP), and can achieve data exchange with third-party devices such as DCS (Distributed Control System) and PLC (Programmable Logic Controller).

3. Security protection mechanism

Rack security level: Integrated two-level security protection functions – “hardware level” CPUM access locking, “software level” MPS password verification, restrict Ethernet connections from operating MPS functions, and avoid interfering with device monitoring and protection operations.

Status diagnosis: The DIAG (diagnostic) LED light on the front panel provides real-time feedback on the operating status. A constant green light indicates normal operation; Flashing green indicates normal operation but subject to rack safety restrictions; Extinguishing indicates abnormality.

4. The interface extension function of IOCN

Communication interface transfer: As a supporting IO card for CPUM, it provides standardized interfaces (RJ45, RJ11/RJ25, D-sub) to transfer CPUM’s main/backup Ethernet and serial signals to the outside, such as transferring CPUM’s main Ethernet from the “NET” interface to IOCN’s “1” interface.

Extended serial port support: When the CPUM is equipped with an optional serial communication module, IOCN’s “A” and “B” interfaces can provide an additional 2 RS-422/RS-485 interfaces, supporting multi node RS-485 network configuration for VM600 racks.

Key technical specifications

1. CPUM core parameters

Category specification details

CPU module model: PFM-541I or equivalent; Processor: AMD Geode ™  LX800（500MHz）； Memory: 256MB DRAM; Operating System: QNX

Power supply and power consumption Power supply voltage: 5VDC ± 5%; Power consumption:<10W; CPU module powered separately:+5VDC (<1.8A)

Communication Interface – Main Ethernet: 10/100BASE-TX (100Mbps), RJ45 interface, used for MPSx configuration and Modbus TCP

-Backup Ethernet (requires IOCN): 10/100BASE-TX, RJ45 interface (IOCN’s “2” interface), used for redundant Modbus TCP

-Main serial port: RS-232 (115.2kBaud), 9-pin D-sub interface, used for MPSx direct connection configuration

-Backup serial port (IOCN required): RS-232/RS-485 (115.2kBaud), RJ11/RJ25 interface (IOCN’s “RS” interface), used for Modbus RTU

-Extended serial port (optional module required): 2-channel isolated RS-422/RS-485, RJ11/RJ25 interface (IOCN’s “A” and “B”)

Environmental adaptability working temperature: -20 to+65 ℃ (-4 to+149 ℉); Storage temperature: -25 to+80 ℃ (-13 to+176 ℉); Humidity: 0-90% (non condensing)

Physical dimension height: 6U (262mm); Width: 40mm; Depth: 187mm; Weight: Approximately 0.40kg (0.88lb)

2. IOCN core parameters

Category specification details

Interface type – Ethernet: 2 RJ45 (“1” for primary Ethernet adapter, “2” for backup Ethernet)

-Serial port: 1 RJ11/RJ25 (“RS”, backup serial port), 2 pairs of RJ11/RJ25 (“A” “B”, extended serial ports)

Isolation performance RS-485 isolation: 500VDC; Extended serial port module isolation:>100VDC

Power supply and power consumption Power supply voltage: 5VDC ± 5%; Power consumption:<2W

Physical dimension height: 6U (262mm); Width: 20mm; Depth: 125mm; Weight: Approximately 0.25kg (0.55lb)

3. LED and button functions

LED indicator lights: DIAG (diagnostic), OK (current channel normal), A (current channel warning, yellow), D (current channel dangerous, red).

Buttons: ALARM RESET (Reset Full Rack Alarm), SLOT ± (Switch Rack Slot), OUT ± (Switch Current Slot Channel).

Version differences and ordering information

1. Product version classification

Product Version Type Core Features Order Number (Example)

CPUM Ethernet Redundancy Edition comes standard with CPU module, 2 Ethernet+2 serial ports, including front-end display screen and OS authorization 601-003-000-VVV \ 3 \ 610-1CC-CCC (equivalent to 200-595-OSs-33h)

The Ethernet redundancy painted version is the same as the Ethernet redundancy version, with the addition of a conforming coating to enhance environmental protection 601-003-000-VVV \ 3V \ 610-1CC-CCC (equivalent to 200-595-0Ss-33hl)

The serial redundancy version includes a CPU module and a serial communication module, supporting 2 Ethernet ports and 4 serial ports (including 2 extensions) 601-003-000-VVV \ 5 \ 610-1CC-CCC (equivalent to 200-595-OSs-53h)

IOCN standard version basic interface adapter function, uncoated 200-566-000-1Hh

The painted version is the same as the standard version, with the addition of a conforming coating of 200-566-000-1HL

2. Ordering code instructions

VVV “: represents firmware (embedded software) version and hardware version;

1CC-CCC “: represents product configuration (such as 610-100-000 as standard configuration);

Ss/Hh “:” S/H “represents significant version modifications that affect interchangeability, while” s/h “represents minor modifications that have no impact.