Description
The GE Fanuc IC693CMM301 is a high-performance Communication and Memory Module designed for the GE Fanuc Series 90-30 Programmable Logic Controller system. This versatile module serves dual critical functions, providing both expanded memory capacity and enhanced communication capabilities to the PLC platform. As a memory module, it significantly extends the data storage capacity of the CPU, enabling the handling of more complex control programs and larger data sets. As a communication module, the GE Fanuc IC693CMM301 facilitates data exchange between the Series 90-30 PLC and various external devices, including programming terminals, human-machine interfaces, and higher-level supervisory systems. The module is engineered to enhance the overall capability and flexibility of the Series 90-30 system, making it suitable for more sophisticated automation applications that require extensive data processing and multi-point communication.

IC693CMM301 GE
Technical Specifications
| Parameter Name | Parameter Value |
| Product Model | IC693CMM301 |
| Manufacturer | GE Fanuc (now part of Emerson) |
| Product Type | Communication and Memory Module |
| Compatibility | GE Series 90-30 PLC Systems |
| Memory Type | Battery-backed RAM |
| Memory Capacity | 256K bytes (expandable) |
| Communication Ports | 1 RS-232 port, 1 RS-485 port |
| Protocol Support | SNP, SNPX, Modbus RTU |
| Baud Rate | 300 to 19.2K baud (configurable) |
| Isolation | 1500V RMS optical isolation on RS-485 port |
| Power Requirements | 5V DC from backplane (120mA typical) |
| Battery Backup | Lithium battery for memory retention |
| Battery Life | Approximately 5 years |
| Operating Temperature | 0 to 60°C (32 to 140°F) |
| Storage Temperature | -40 to 85°C (-40 to 185°F) |
| Relative Humidity | 5% to 95% non-condensing |
| Dimensions | 3.94 x 5.12 x 1.57 inches (100 x 130 x 40 mm) |
Main Features and Advantages
The GE Fanuc IC693CMM301 offers significant advantages through its dual-function design. Enhanced memory capacity: The module provides substantial additional memory storage, allowing for more complex ladder logic programs, larger data tables, and extended register capacity, which is particularly valuable for applications requiring extensive data logging or complex control algorithms. Dual communication ports: Featuring both RS-232 and RS-485 serial ports, the GE Fanuc IC693CMM301 provides flexible connectivity options for various devices and networks, enabling simultaneous communication with multiple systems.
Protocol versatility: The module supports GE Fanuc’s SNP and SNPX protocols for programming and diagnostics, plus Modbus RTU protocol for integration with a wide range of third-party devices including HMIs, SCADA systems, and other PLCs. Optical isolation on the RS-485 port provides protection against ground loops and electrical noise, ensuring reliable communication in harsh industrial environments. The battery backup system maintains memory contents during power outages, preserving critical program data and system parameters. The GE Fanuc IC693CMM301 is designed for easy installation and configuration, with DIP switch settings for communication parameters and LED indicators for status monitoring.
Application Field
The GE Fanuc IC693CMM301 finds extensive application in industrial automation systems where enhanced memory and communication capabilities are required. In manufacturing environments, this module is deployed in automotive production lines, packaging machinery, and material handling systems where it enables complex sequencing operations and facilitates data exchange between multiple control devices. The GE Fanuc IC693CMM301 is particularly valuable in process control applications such as chemical processing, water treatment plants, and food production facilities, where its expanded memory capacity supports data logging of process variables and its communication ports enable integration with supervisory control systems.
In building automation, the GE Fanuc IC693CMM301 is used for HVAC control, energy management systems, and security systems, providing the necessary communication interfaces to connect with various building management components. The module’s Modbus RTU capability makes it ideal for integration projects where Series 90-30 PLCs need to communicate with existing Modbus-based systems in industries such as power generation, oil and gas, and infrastructure monitoring. The GE Fanuc IC693CMM301 also serves educational and research institutions where its dual functionality supports both teaching applications and experimental automation setups requiring flexible communication options.

IC693CMM301 GE
Related Products
IC693CPU350: Series 90-30 CPU module compatible with the CMM301
IC693CMM302: Enhanced communication module with additional features
IC693ACC300: Standard power supply for Series 90-30 systems
IC693MDL645: 16-point digital output module
IC693ALG220: Analog input module for process applications
IC690CBL500: RS-232 programming cable for communication setup
IC694ACC300: Alternative power supply unit
IC693BEM331: Genius Bus Controller for network communication






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