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- IC693PCM331
- Programmable Coprocessor Module
- USA
- 140 x 140 x 35 mm
- 0.476 kg
- Xiamen, China
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Product Overview
The GE IC693PCM331 Programmable Coprocessor Module is an advanced auxiliary processing unit designed for the GE Series 90-30 PLC system. It operates as a secondary processor that works in parallel with the main PLC CPU to handle complex computation tasks, communication processing, and custom industrial control programs.
It is commonly used in applications requiring high-speed data handling, multi-protocol communication, and advanced programmable logic execution beyond standard PLC capabilities.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | GE (GE Fanuc / Emerson) |
| Model | IC693PCM331 |
| Product Type | Programmable Coprocessor Module |
| System Compatibility | GE Series 90-30 PLC |
| Processor Architecture | 32-bit RISC |
| Total Memory | 1 MB (typical PCM331 configuration) |
| User Program Memory | ~300 KB (MegaBasic / C programs) |
| Programming Languages | C, MegaBasic |
| Communication Ports | Dual serial ports (RS-232 / RS-485 capable) |
| Supported Protocols | Modbus RTU, GE CCM, ASCII |
| Operating Mode | Parallel processing with PLC CPU |
| Data Handling | High-speed buffered I/O communication |
| Battery Backup | Lithium battery for RAM retention |
| Backplane Power | ~400–500 mA @ 5 VDC |
| Slot Requirement | 1 slot |
| Mounting Type | Rack-mounted |
| Material | Industrial-grade electronic module |
| Dimensions | 140 × 140 × 35 mm |
| Weight | 0.476 kg |
| Operating Temperature | 0°C to 60°C |
Function and Working Principle
The IC693PCM331 operates as a high-performance coprocessor, extending PLC functionality.
Its working principle includes:
- Receiving real-time data from the PLC CPU via backplane communication
- Executing independent control or computation programs
- Handling communication-intensive tasks (Modbus, ASCII, GE CCM)
- Managing external serial devices such as HMIs, barcode scanners, and printers
- Running parallel processing tasks without affecting PLC scan cycle performance
This significantly improves system efficiency in communication-heavy automation environments.
Role in Industrial Control Systems
The IC693PCM331 plays a key role in advanced GE PLC architectures:
- Acts as an independent auxiliary processor
- Handles complex industrial communication tasks
- Executes custom algorithms beyond ladder logic
- Integrates legacy serial devices into modern systems
- Reduces processing load on the main PLC CPU
- Supports real-time multi-tasking operations
Industrial Applications
The GE IC693PCM331 is widely used in:
- Industrial automation systems
- SCADA communication systems
- Barcode and tracking systems
- Weighing and batching systems
- Process control applications
- Serial device integration (printers, RTUs, scanners)
- Data acquisition and logging systems
Installation and System Integration
Recommended installation practices include:
- Installing in GE Series 90-30 PLC rack (single slot)
- Ensuring compatibility with main CPU firmware version
- Connecting serial ports to external industrial devices
- Installing lithium backup battery for memory retention
- Configuring communication parameters via GE software tools
Proper configuration ensures stable and synchronized operation with the PLC CPU.
Compatible System Components
The IC693PCM331 typically works with:
- GE Series 90-30 CPU modules (IC693CPU series)
- Serial communication devices (RS-232 / RS-485 systems)
- SCADA and HMI systems
- Barcode scanners and industrial printers
- Modbus RTU and GE CCM networks
- Legacy industrial automation equipment
Recommended Alternative Models
| Model | Type | Key Feature | Application |
|---|---|---|---|
| IC693PCM331 | Coprocessor Module | High-memory advanced PCM | Complex automation systems |
| IC693PCM311 | Coprocessor Module | Mid-range memory version | Standard advanced processing |
| IC693PCM300 | Coprocessor Module | Basic PCM module | Simple communication tasks |
| IC693CMM321 | Communication Module | Ethernet/serial communication | Network integration |
| IC693CPU364 | CPU Module | Main PLC processor | Primary control system |
Key Advantages
- High-performance auxiliary processing capability
- Supports C and MegaBasic programming
- Dual serial communication interfaces
- Efficient handling of communication-heavy tasks
- Strong support for legacy industrial systems
- Reliable industrial-grade design for continuous operation
Technical FAQs
What is the main function of IC693PCM331?
It acts as a coprocessor for advanced computation and communication tasks.
Does it replace the PLC CPU?
No, it works alongside the CPU as an auxiliary processor.
What programming languages does it support?
C language and MegaBasic programming.
What devices can it connect to?
HMIs, barcode scanners, printers, RTUs, and serial industrial equipment.
Conclusion
The GE IC693PCM331 Programmable Coprocessor Module is a high-performance auxiliary processor designed for GE Series 90-30 PLC systems. With expanded memory, dual serial communication, and advanced programming capabilities, it is ideal for complex industrial automation environments requiring high-speed processing and multi-device integration.