MODICON PC-E984-255 PLC Processor Module

Technical SpecificationsModel:PC-E984-255 Brand:MODICON Product Type:Compact 984 Series PLC Central Processor Logic Memory:16K words Data Memory:24K words I/O Capacity:256 local I/O points Scan Time:2.5ms per 1K logic Communication:1 × Modbus serial port Backplane Bus:Modicon 984 backplane Mounting:Backplane rack slot mount Operating temperature:0℃ ~ +60℃ Storage temperature:-20℃ ~ +70℃ Relative humidity:5%~95%, non-condensing Weight:1.6kg Dimension:260mm140mm30mm Protection:IP20

System compatibilityPC-E984-255 belongs to MODICON Compact 984 series CPU processor. Compatible with MODICON 984 backplane,800 series digital/analog I/O modules and communication cards. It supports local rack I/O and remote I/O expansion. Suitable for chemical plant,water treatment,packaging machinery,conveyor line legacy PLC system renovation and replacement as industrial spare part.

FunctionPC-E984-255 Compact 984 CPU module. It executes ladder logic program,cyclically scans I/O signals,performs logic and arithmetic calculations. It manages program memory,data memory and Modbus serial communication. It exchanges data with HMI and SCADA systems,controls field I/O modules. Built-in hardware self-diagnosis,run status monitoring and fault alarm function. Battery backup retains program and data during power loss. Widely used as core controller for legacy MODICON 984 automation system, serving as reliable CPU spare part.

InstallationCut off rack power before installation. Insert PC-E984-255 CPU module into MODICON backplane slot and lock the card. Check gold finger contact condition. Connect Modbus serial communication cable. Download PLC program,configure I/O address and communication parameters,complete online running test before formal operation.

InterfaceBackplane bus connector,Modbus serial port,run/fault/battery status LED indicators for PC-E984-255 MODICON PLC CPU module.

FeatureMODICON PC-E984-255 Compact 984 CPU,16K logic memory,Modbus communication,classic modular rack design,battery memory backup,hardware self-diagnosis,standard single slot rack structure,industrial anti-interference design. This discontinued legacy industrial spare part used for old MODICON Compact 984 PLC system main control maintenance and replacement.

DiagnosticModule not recognized: check rack power supply,backplane contact and module insertion for PC-E984-255. PLC fault alarm: check program error,memory failure and low backup battery voltage. Modbus communication failure: inspect serial cable,baud rate and shielding grounding. Program lost after power off: verify backup battery aging and battery replacement. Intermittent offline: check backplane power stability and electromagnetic interference.

Product BriefPC-E984-255 is MODICON Compact 984 series PLC CPU processor. It executes user control logic,manages I/O scanning and Modbus communication for MODICON legacy automation system,classic spare part for legacy MODICON industrial automation equipment overhaul.

Disclaimer: All parameters are for reference only and shall not be used as the basis for quotation. Goods are scarce, overseas delivery lead time is 3-7 working days. It is only used for equipment maintenance and renovation.