PLCs, Power Supplies & Others

Compact Processor for 984 Series PLCs

The Schneider PCE984241 functions as a compact central processing unit within the Modicon 984 series architecture. This module stores user logic and system overhead in battery-backed CMOS RAM for reliable program retention . It solves ladder logic at a speed of 2.5 ms per 1,000 nodes of standard logic . A 16 MHz CPU clock drives the execution of all control tasks and communication handling .

Memory Architecture and Storage

The Schneider PCE984241 provides 8K words of user memory for program storage, along with 2K words of State RAM for real-time data . Extended memory adds 10K words of total capacity, offering ample space for larger applications . The system executive resides in nonvolatile FLASH RAM, whereas the user logic resides in battery-backed CMOS RAM . This dual-memory design ensures data integrity during power cycles.

Communication and Integration

This CPU module features two Modbus communication ports, facilitating seamless connectivity with programming panels, host computers, and diagnostic tools . These ports also support communication with other controllers on a Modbus network. Consequently, the PCE984241 integrates easily into multi-controller networks for distributed control .

Hardware Specifications

The module operates on a 5 V DC supply and weighs approximately 0.6 kg . It supports the low-cost A120 I/O modules for system expansion . Additionally, the processor provides full upward compatibility with other 984 series controllers, simplifying system upgrades.

Technical Specifications

Details