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Home>GE>Emerson IC695CMM002 PACSystems RX3i Serial Communications Module
Emerson IC695CMM002 PACSystems RX3i Serial Communications Module

Emerson IC695CMM002 PACSystems RX3i Serial Communications Module Item NO.: 2907979

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Product Name Emerson IC695CMM002 PACSystems RX3i Serial Communications Module
Item NO. 2907979
Weight 0.1 kg = 0.2205 lb = 3.5274 oz
Category GE
Brand GE
Creation Time 2026-09-14

Emerson IC695CMM002 PACSystems RX3i Serial Communications Module
Industrial Automation Hardware

Emerson IC695CMM002 PACSystems RX3i Serial Communications Module

01

Product Overview

IC695CMM002 extends the serial communication capacity of a PACSystems RX3i controller with two independent, electrically isolated ports. It occupies an RX3i Universal Backplane position and transfers port status, control information and serial data between connected devices and the RX3i CPU.

Each port can be software-selected for RS-232 or RS-485/422 electrical operation. The protocol set covers MODBUS Master, MODBUS Slave, CCM Slave, DNP3 Master, DNP3 Slave and Serial I/O. The two channels can serve separate serial links, while DNP3 operation applies a module-wide protocol constraint: if either port is assigned to DNP3, the other port must also use a DNP3 role.

It supports the full protocol set in the main CPU backplane. In supported PNS racks and CEP remote nodes, configuration is limited to MODBUS Master or MODBUS Slave. PAC Machine Edition stores the hardware configuration and maps port status and control references to the controller.

Emerson IC695CMM002 serial communications module
Official product image · Click to enlarge
02

Technical Specifications

Technical Item Specification Value
Brand Emerson
Model IC695CMM002
Product Type PACSystems RX3i Serial Communications Module
Country of Origin United States
Serial Ports 2 independent, isolated ports
Connectors 2 × RJ-45
Selectable Baud Rates 1200, 2400, 4800, 9600, 19.2K, 38.4K, 57.6K, 115.2K
Backplane Power 0.7 A maximum at 3.3 VDC; 0.115 A maximum at 5.0 VDC
Operating Temperature 0°C to +60°C
Turnaround Delay 6 ms minimum
Input Impedance Greater than 96 kΩ for RS-485/422; 3 kΩ to 7 kΩ for RS-232
Maximum Overvoltage ±25 V
Channel-to-Channel Crosstalk -55 dB minimum
Port-to-Backplane Isolation 250 VAC continuous; 1500 VAC / 1 min; 2550 VDC / 1 s
Port-to-Port Isolation 500 VDC continuous; 710 VDC / 1 min
Internal Clock Accuracy ±0.0105% (±9.072 s/day) from 0°C to +60°C
03

Communication & Connectivity

Two ports, two independent signal paths

IC695CMM002 keeps the channels electrically isolated from one another and from the backplane. Each port can be assigned its own serial electrical mode and communication role, subject to the DNP3 module-wide restriction.

Point-to-point

RS-232 Links

Use the unbalanced interface for an individual serial device. Hardware handshaking can be selected as RTS/CTS or RFR/CTS, or flow control can be disabled.

Multi-drop capable

RS-485/422 Networks

Select four-wire full-duplex or two-wire half-duplex operation to match the external network topology and connected device interfaces.

Protocol roles

Controller and Device Exchange

MODBUS Master and Slave roles support polling or responding. CCM Slave, Serial I/O and DNP3 roles extend communication to other supported serial applications.

Deployment boundary

Remote RX3i Locations

A PNS-managed rack can contain up to four modules and a CEP-managed node up to one. Only MODBUS Master or Slave configurations are supported in these remote positions.

04

Configuration & Programming

1

Select the port mode

Choose RS-232 or RS-485/422, then set duplex behavior, baud rate, parity, data bits, stop bits and flow control.

2

Assign a protocol

Configure the required master, slave or Serial I/O role. Keep both ports within DNP3 roles if either port uses DNP3.

3

Map control data

Assign CPU reference addresses for each port's input status and output control data so application logic can monitor and command communications.

4

Define exchanges

For MODBUS Master, configure external device addresses, exchange types and CPU memory locations; up to 64 exchanges can be defined.

Runtime data path: status and control data follows the CPU I/O scan. Serial communication data is transferred separately and is not synchronized with that scan, allowing the module to continue its configured serial exchanges while the controller manages port commands and status.
05

Technical Questions

Can IC695CMM002 run DNP3 on one port and MODBUS on the other?

No. If either IC695CMM002 port is configured as DNP3 Master or DNP3 Slave, the other port must also use a DNP3 role. Mixed non-DNP3 roles can be selected where the configuration permits them.

Does IC695CMM002 require COMMREQ logic for configured MODBUS exchanges?

No. IC695CMM002 handles configured MODBUS Master or Slave communication through its hardware configuration, status/control references and mapped exchange data rather than application-level COMMREQ commands.

What changes when IC695CMM002 is installed in a PNS or CEP remote location?

The available protocol set is reduced to MODBUS Master or MODBUS Slave. A PNS-managed remote rack supports up to four serial modules, while a CEP-managed remote node supports one.

Which cabling checks matter when connecting IC695CMM002 to a MODBUS device?

Match the cable to the selected RS-232 or RS-485/422 mode and verify the IC695CMM002 RJ-45 pin assignment rather than assuming a generic MODBUS pinout. Use shielded cable where CE emission and immunity compliance is required.

How can an application monitor and recover an IC695CMM002 port?

Use the configured port status and control references. They expose communication state to application logic and provide control actions used to start or stop communication, clear errors and reset the port.

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