Product Details

Modicon PC-K084-785 is a reliable compact plc cpu and high-performance programmable controller belonging to the classic Modicon 984 control family. This legacy processor unit serves as the central brain for mid-size industrial automation racks, executing ladder logic, scanning local and remote I/O, and communicating with HMI, supervisory computers and distributed field stations. It features built-in serial communication ports for Modbus links and supports the S908 remote I/O bus to expand distributed signal acquisition. With stable memory retention for user logic and register data, this compact plc cpu can sustain continuous round-the-clock operation for process machinery. As a discontinued legacy spare, this programmable controller is widely stocked as a drop-in replacement, helping ageing Modicon automation racks recover full control capability without system-wide upgrading.

Basic Parameters

Brand: Modicon (AEG legacy)

Model: PC-K084-785

Product Type: Compact PLC CPU / Programmable Controller

Series: Modicon 984

Power Supply: 115 / 230 VAC

Programming Language: Ladder Logic

Communication: Built-in Modbus serial port, compatible with S908 RIO bus

Memory: Large logic memory for complex process programs

Mounting: Standard slot mount for 984 series chassis

Product Status: Discontinued legacy spare

Net Weight: Approximately 2.26 kg

Supported Functions

This compact plc cpu supports ladder logic upload, download and modification, high-speed I/O scanning and real-time register data storage. The programmable controller carries out built-in self-diagnosis to detect backplane faults, communication interruptions and internal hardware failures. This legacy processor unit supports sequential control, interlock logic, mathematical computation and remote I/O expansion, and can transmit alarm information and process variables to upper monitoring systems.

Core Functions

As the core programmable controller, this compact plc cpu interprets and runs all user control logic, converts incoming sensor signals into output commands for field actuators, and maintains consistent scan timing for the whole rack. It manages Modbus and remote I/O bus communication to synchronise distributed automation nodes. This legacy processor unit acts as a direct spare to restore central control for ageing Modicon automation racks.

Hardware Specifications & Environmental Features

Operating Temperature: -10°C ~ +60°C

Storage Temperature: -20°C ~ +70°C

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

Housing: Heavy-duty metal shielded casing

Protection: Internal fuse and transient surge suppression

Anti-interference: EMI filtering for heavy industrial environments

Compatibility: Matches 800 series backplane and compatible peripheral modules

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 800 series backplane compatibility, pulse signal type, counting mode and preset logic before ordering.

This is from our current stock.

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