GE Fanuc IC693CMM311L Communications Control Module

Configured for serial message processing and protocol management in Series 90-30 automation networks, the GE Fanuc IC693CMM311L (IC693CMM311 Communications Control Module) provides direct physical/electrical execution. Operating with a 16-bit processor and 64 KB RAM buffer, the unit handles serial data transmission across RS-232 and RS-485 physical interfaces to interface PLCs with external field equipment without introducing main CPU sweep overhead.

Hardware Specifications

Backplane Bus Communication Velocity & Firmware Flash Compatibility

The IC693CMM311L offloads serial protocol translation and buffer management to preserve backplane bus communication velocity across Series 90-30 baseplate configurations. Dual internal circuit boards isolate power regulation and memory management from physical line driver circuits, while 1000 VDC optical isolation prevents field ground loops and voltage spikes from propagating to internal backplane logic bus lines. Onboard buffer memory retains transient datagrams during baud rate mismatches or line noise events, ensuring firmware flash compatibility and uninterrupted data exchange across multi-drop networks with up to 31 connected nodes.

Frequently Asked Questions

Q: What physical communication ports are integrated on the IC693CMM311L module?

A: The module features two independent serial ports: one RS-232 port for local programming and point-to-point connections, and one RS-485 port for multi-drop networks supporting up to 31 devices.

Q: What optical isolation level does the IC693CMM311L provide between field wiring and internal logic?

A: The module incorporates 1000 VDC optical isolation on communication channels to separate field signal lines from the internal backplane logic circuitry.

Q: Can the RS-232 and RS-485 ports operate at different communication speeds simultaneously?

A: Yes. Each port features individually selectable baud rates ranging from 300 bps to 115200 bps to match specific field device transmission capabilities.

Field Installation Guidelines

1. De-energize primary supply power to the Series 90-30 rack chassis and external communication drops before inserting or removing the module.
2. Align the top rear hook of the module housing with the mounting notch of the selected baseplate slot.
3. Pivot the module downward and press firmly until the backplane bus connector completely locks into the rack socket.
4. Secure shielded RS-232 and RS-485 communication cables, grounding the cable shield braid at a single earth reference point to prevent noise coupling.
5. Terminate the RS-485 multi-drop network trunk line at both physical ends using appropriate line termination resistors.