Description

Product Description

The IC693PCM311 is a high-performance Programmable Coprocessor Module (PCM) for the GE Fanuc Series 90‑30 PLC family. It enhances the main CPU by handling complex logic, serial communications, and specialized data processing, freeing the primary processor for core automation tasks.

Equipped with 640 KB of onboard memory, including 190 KB dedicated to MegaBasic programs, this module also supports C programming for custom applications. Two independent serial ports provide flexible connectivity for Modbus RTU, GE Fanuc CCM, ASCII, and user-defined serial protocols, with port activity indicated via dedicated LEDs. Battery-backed RAM ensures program retention during power interruptions.

Technical Specifications

Memory

• Total Onboard Memory: 640 KB

• MegaBasic Program Memory: 190 KB

• Battery-Backed RAM: Yes (uses IC693ACC301 lithium battery)

Communication Ports

• Two serial ports (RS‑232 / RS‑422/485 via appropriate cable)

• Front-panel access with activity LEDs for Port 1 and Port 2

• Supports baud rates up to 115.2 kbps depending on configuration

• Compatible with Modbus RTU, CCM, ASCII, and custom serial protocols

Programming Support

• MegaBasic

• C Language

• Independent operation from main CPU

• RUN/PROGRAM mode selectable via pushbutton

Power Requirements

• Backplane Power Draw: 400–600 mA @ 5 VDC (depending on configuration)

Installation Requirements

• Mount in CPU baseplate only; slot 1 reserved for CPU

• Not compatible with expansion or remote racks

• Requires IC693CBL305 or equivalent for port breakout

Indicators & Controls

• OK LED for module health

• US1/US2 LEDs for port activity

• Restart pushbutton for RUN/PROGRAM mode selection

Mechanical

• Dimensions: 140 × 140 × 35 mm

• Weight: 0.99 lbs

Environmental Ratings

• Operating Temperature: 0 °C to 60 °C

• Storage Temperature: –40 °C to +85 °C

• Humidity: 5–95% non-condensing

Key Features

• 640 KB onboard memory with 190 KB MegaBasic space

• Dual serial ports with LED activity indicators

• Supports Modbus RTU, GE Fanuc CCM, ASCII, and custom protocols

• C and MegaBasic programming capability

• Battery-backed RAM for program retention

• Ideal for offloading complex logic and serial communication from the main CPU

Applications

Suitable for data acquisition, custom algorithm execution, serial device integration, RTU master applications, and high-level communication tasks in Series 90‑30 PLC systems.

FAQ

Q: Can this module operate in an expansion rack?
A: No, IC693PCM311 must be installed in a CPU baseplate slot (not slot 1).

Q: What serial protocols are supported?
A: Modbus RTU, GE Fanuc CCM, ASCII, and user-defined protocols.

Q: How is program retention handled?
A: Battery-backed RAM (IC693ACC301) ensures memory retention during power loss.

Specifications

• Brand: General Electric

Advantages

• High reliability in industrial environments
• Supports continuous operation
• Compatible with major PLC/DCS systems