Technical Specifications Breakdown
Key parameters for the PC-E984-285 are listed below for quick reference:
| Feature | Specification |
|---|---|
| Manufacturer | Schneider Electric |
| Product Type | CPU |
| Product Line | Modicon |
| Part Number | PC-E984-285 |
| Weight | 3.00 lbs (1.36 kg) |
| Logic Memory | 32k |
| Registers | 1920 |
| Data Memory | 64k |
| Scan Time | 2.5 ms/k |
| Communication Ports | 2 Modbus, 1 Modbus+ |
| Local I/O | 256 |
| Total I/O | 512/512 |
| I/O Drops | 1 |
Industry Applications and Operational ROI
With 32k logic memory and 64k data memory, it handles moderate-sized programs efficiently. The 2.5 ms/k scan time ensures timely responses, minimizing scrap and rework. For plant expansions, the ability to manage up to 512 total I/O points and one I/O drop provides cost-effective scalability without replacing the controller.

Installation and Setup Guidance
Mount the CPU in a clean, dry cabinet away from vibration. Connect power per Schneider guidelines (verify voltage from your system design). Attach Modbus and Modbus+ cables using shielded twisted-pair wiring. Configure the node address via the front-panel switches. Load your logic program using Modsoft or Concept software. After power-up, monitor the run LED and scan time register to confirm normal operation.
Maintenance and Reliability
Inspect the CPU quarterly for dust accumulation on vents and connectors. Ensure ambient temperature stays within the rated range (if specified in your system design). Verify that communication cables are secure and free from corrosion. No user-serviceable internal parts exist; if the unit fails, replace it with a known-good spare to minimize downtime.
Reliable Processing for Demanding Automation
From a maintenance engineer's perspective, the Schneider Modicon PC-E984-285 CPU is designed for consistent performance in industrial environments. Its robust architecture supports complex control tasks with minimal downtime, making it a trusted choice for facilities requiring dependable operation.

Compatibility and Integration
Its two Modbus ports support peer-to-peer or master-slave communication with drives, HMIs, and other controllers. The Modbus+ port enables high-speed data exchange on a token-passing network. This compatibility simplifies retrofits and expansions in existing Schneider environments.
Selection Guide and Purchasing Advice
When selecting a replacement or spare CPU, verify that your program size fits within 32k logic memory and 64k data memory. The PC-E984-285 is available from AutoDCSTech, a trusted supplier of industrial automation parts. Please verify current lifecycle status and availability with AutoDCSTech before ordering.
Availability & Condition at AutoDCSTech
| Part Number | PC-E984-285 |
|---|---|
| Availability | In Stock |
| Condition | New |
| Warranty | One Year |
| Origin | France |
