Description
Overview
The IC200CMM020 is a VersaMax serial communication interface module developed by GE Fanuc Emerson, designed to extend system connectivity by enabling Modbus RTU master functionality within a VersaMax I/O station.
It allows a single VersaMax rack to communicate directly with external Modbus slave devices such as variable frequency drives, instrumentation panels, barcode scanners, and third-party controllers. Communication is routed through a Genius LAN structure, allowing integration with both Genius-based and PROFINET-capable NIU systems.
Communication Architecture
This module operates as a Modbus RTU master node and manages serial polling and command execution for connected field devices.
-
Supports Modbus RTU master mode operation
-
Communication through Genius LAN backplane
-
Compatible with Genius NIU and PROFINET NIU systems
-
Supports up to 2 serial modules per NIU station
-
Data exchange handled via COMMREQ instructions from controller logic
Serial Interface Specifications
-
Communication standard: RS-485 (2-wire or 4-wire selectable)
-
Physical connector: 15-pin D-sub interface
-
Supported baud rates: 1200, 2400, 4800, 9600, 19200 bps
-
Duplex modes: half-duplex and full-duplex operation
-
RS-232 compatibility: available via external adapter (IC690ACC901)
Device Capacity and Protocol Support
-
Modbus RTU slave addressing: 1 to 247 devices per network
-
Maximum serial modules per NIU station: 2
-
Supports cyclic polling and command-based communication
-
Suitable for mixed vendor Modbus device integration
Electrical Characteristics
-
5 VDC backplane current consumption: approx. 460 mA
-
3.3 VDC consumption: approx. 5 mA
-
Auxiliary 5 V output available for external serial devices (100–200 mA depending on load)
-
Designed for low-voltage logic-level communication stability
Functional Operation
The module executes Modbus communication tasks through controller-issued COMMREQ instructions, supporting:
-
Master port initialization
-
Read/write register operations
-
Force and preset commands
-
Diagnostic query handling
This structure enables deterministic control of third-party Modbus RTU devices within a VersaMax system architecture.
Mechanical and Installation Details
-
Requires IC200CHS006 communication carrier for mounting
-
Compatible with any slot position in VersaMax I/O rack
-
Supports daisy-chained RS-485 field wiring for network expansion
-
Compact module footprint designed for dense cabinet layouts
Weight: 0.18 lbs
Environmental Ratings
-
Operating temperature range: 0°C to 40°C
-
Certifications: CE, cULus
-
Designed for controlled industrial cabinet environments
Applications
-
Integration of Modbus RTU field devices into VersaMax systems
-
Drive and motor control communication interfaces
-
Third-party instrumentation data acquisition
-
Multi-vendor device networking
-
Machine-level serial communication expansion
FAQ
Q1: Does this module operate as a Modbus slave?
No, it functions exclusively as a Modbus RTU master device.
Q2: How many devices can it control?
Up to 247 Modbus RTU slave devices per serial channel.
Q3: What carrier is required for installation?
It requires the IC200CHS006 communication carrier for proper mounting and backplane connection.
