IC693CMM311J GE Fanuc Series 90-30 CMM Datasheet Technical Manual

GE Fanuc IC693CMM311J Series 90-30 Communications Control Module

Configured for dedicated communication processing in GE Fanuc Series 90-30 PLC systems, the GE Fanuc IC693CMM311J (IC693CMM311 Communications Coprocessor Module) provides direct physical/electrical execution. The hardware functions as an autonomous interface layer that manages protocol encoding and decoding routines independently from the central processor. By assuming dedicated orchestration of external data requests, the single-slot board maintains deterministic execution cycles across local automation configurations.

Suffix Breakdown & Model Matrix

• IC693CMM311: Base part designation for the Series 90-30 Communications Coprocessor Module (CMM) supporting dual serial ports and standard multi-protocol operations.
• Suffix J: Identifies a specific hardware manufacturing layout revision. The J revision includes component modifications to optimize signal line characteristics on the physical layer transceivers and updates the internal logic substrate for long-term power stabilization.

Hardware Specifications

Profinet / EtherNet/IP Deterministic Networks and I/O Density Scaling

The GE Fanuc IC693CMM311J shifts serial protocol overhead away from the controller core, communicating across the rack assembly using parameters governed under backplane bus communication velocity licenses. This design prevents large serial packets from introducing erratic jitter into localized I/O updates.

When transitioning legacy Series 90-30 automation blocks into modern plant architectures structured around Profinet / EtherNet/IP deterministic networks, this coprocessor manages the legacy serial nodes. The hardware architecture maintains specific register polling maps that match downstream I/O density scaling profiles, ensuring consistent byte synchronization during parallel Modbus or SNP multidrop executions.

Frequently Asked Questions

Q: Does the IC693CMM311J support full Modbus RTU Master configuration capabilities?

A: No. The internal protocol stack firmware limits Modbus RTU and Modbus ASCII operations to Slave mode functionality only. If a configuration requires the Series 90-30 platform to initiate commands as a network Master, an alternative module such as the CMM321 must be utilized.

Q: Can this module be installed into an expansion or remote baseplate rack assembly?

A: No. The IC693CMM311J requires direct physical positioning on the primary CPU baseplate. It cannot function correctly inside expansion or remote chassis configurations because the localized high-speed communication lines are optimized for direct CPU bus connection.

Q: What operational indicator states occur when a serial port interface detects an active configuration link?

A: The module relies on its three front-panel status indicators. The Module OK LED remains lit to confirm healthy internal logic execution, while the dedicated PORT1 and PORT2 (or US1/US2) LEDs illuminate and flash to indicate active data frames crossing the physical line.

Field Installation Guidelines

• Remove all primary power feeds from the target Series 90-30 baseplate prior to sliding the communications module into the chassis frame.
• Insert the single-slot board into any available slot position on the CPU baseplate, making sure to avoid the first slot which is reserved exclusively for the CPU module.
• Firmly seat the rear connectors into the backplane pin layout and tighten the physical retention mechanisms to ensure proper grounding.
• Secure all external serial links using shielded cable variants, such as the pre-assembled IC693CBL305 Wye cable, to suppress ambient high-frequency noise.
• Maintain a physical separation path of at least 30 cm between the serial lines and any adjacent high-current AC cabling or industrial variable speed drive lines.