Product Details

Modicon PC-E984-265 is a high-performance compact 984 plc cpu and reliable modbus plus controller belonging to the Modicon TSX Compact 984 processor family. This tsx compact processor runs at 25 MHz, equipped with 8K words of user logic memory, 16K words state RAM and 1 MB Flash for system firmware, supporting LL984 ladder logic programmed by Concept software. It integrates two Modbus serial ports and one Modbus Plus peer-to-peer network port, supporting up to 256 words of total I/O capacity for mixed discrete and analog expansion modules. Built-in lithium battery backup preserves programs, registers and runtime data through power failure, and front-mounted rotary switches and DIP switches allow fast configuration of network node addresses and communication parameters. Six LED indicators clearly display run status, network activity and fault alarms for quick field diagnosis. As a discontinued legacy spare, this compact 984 plc cpu serves as a drop-in replacement to restore distributed process control capability for ageing Modicon TSX Compact racks.

Basic Parameters

Brand: Modicon (Schneider legacy)

Model: PC-E984-265

Product Type: TSX Compact 984 CPU Processor Module

Compatible Rack: Modicon TSX Compact backplane and I/O modules

Clock Speed: 25 MHz

User Logic Memory: 8K words

State RAM: 16K words

System Firmware: 1 MB Flash RAM

Max I/O Capacity: 256 words

Communication: Dual Modbus ports, one Modbus Plus port

Power Supply: 24 VDC

Programming Software: Concept

Indicator: Six front LEDs for power, run, fault and bus status

Configuration: Rotary address switches, DIP parameter switches

Product Status: Discontinued, end of service

Net Weight: Approximately 0.82 kg

Supported Functions

This compact 984 plc cpu supports ladder logic upload, download and online monitoring, cyclic scanning of local and remote expansion I/O, and battery-backed data retention. The modbus plus controller executes PID closed-loop regulation, timer/counter sequencing, recipe storage and alarm logging. This tsx compact processor can operate as Modbus master or slave and exchange peer data over Modbus Plus with other Modicon controllers, HMI and SCADA hosts. It runs comprehensive self-diagnostics to detect memory corruption, low battery, backplane failure and communication timeout, and locks unsafe outputs once critical faults are triggered. It supports hot swap of compatible I/O modules under proper power management to reduce plant downtime during maintenance.

Core Functions

As the central tsx compact processor, this compact 984 plc cpu interprets and executes all user automation logic, converts sensor input signals into drive commands for field actuators, and maintains stable scan cycles for the whole rack. Its native Modbus Plus interface builds a peer distributed control network to synchronise multiple control nodes and remote I/O racks. This modbus plus controller acts as a direct spare to rebuild reliable distributed process control for ageing Modicon automation racks.

Hardware Specifications & Environmental Features

Operating Temperature: 0°C ~ +60°C

Storage Temperature: -20°C ~ +70°C

Relative Humidity: 5%–95%, non-condensing

Housing: Compact industrial plastic module, IP20

Protection: Watchdog timer, lithium battery data backup, transient surge suppression

Anti-interference: Isolated communication ports and EMI filtering for industrial power environments

Compatibility: Modicon TSX Compact I/O modules, Concept programming software, Modbus Plus compatible devices

Industry Applications: Applied in legacy petrochemical distributed control, old paper making production automation, material handling conveyor lines, packaging and textile machinery, water treatment remote signal collection and large conveyor remote I/O control racks.

Note: Confirm backplane compatibility, battery health, Modbus Plus node address and program version before ordering.

This is from our current stock.

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