Product Overview
The Schneider PC-L984-785 Compact CPU is a core component of the Modicon product line, designed for reliable industrial control. This module delivers 24k of logic memory and 42k total memory, enabling efficient handling of complex automation tasks. Its compact design fits seamlessly into existing control cabinets, making it a suitable upgrade for aging PLC systems.
Technical Specifications
| Parameter |
Value |
| Manufacturer |
Schneider Electric |
| Product Type |
Compact CPU |
| Product Line |
Modicon |
| Part Number |
PC-L984-785 |
| Weight |
5.00 lbs (2.27 kg) |
| Logic Memory |
24k |
| Registers |
1920 |
| Total Memory |
42k |
| Scan Time |
2.5 ms/k |
| Communication Ports |
1 Modbus, 1 Modbus+ |
| Local I/O |
256 |
| Total I/O |
512/512 |
| I/O Drops |
1 |
| Maximum Racks |
4 |
With a scan time of 2.5 ms per kilobyte, the PC-L984-785 ensures rapid response for time-critical processes. The integrated 1920 registers provide ample data storage for intermediate calculations.
Industry Applications
The PC-L984-785 Schneider CPU excels in discrete manufacturing, material handling, and process control. For example, in a packaging line, the 256 local I/O points handle sensor and actuator signals directly, while the total I/O capacity of 512/512 supports larger distributed systems. Its Modbus and Modbus+ ports enable easy integration with existing supervisory systems.
Compatibility and Integration
This Compact CPU is part of the Modicon family, ensuring backward compatibility with legacy Modicon I/O modules and racks. The PC-L984-785 supports up to four racks and one I/O drop, allowing scalable system architectures. Communication via Modbus and Modbus+ facilitates connection to HMIs, drives, and other industrial devices without additional protocol converters.
Selection Guide
When purchasing the PC-L984-785, verify that your existing backplane and power supply match the Modicon 984 series requirements. This module is a drop-in replacement for earlier CPUs, offering enhanced memory and faster scan times. For reliable sourcing, trust PLC Source PRO (available at ubest101.myshopify.com) to supply genuine Schneider modules with verified specifications.