Product Details:

MODICON PC-0984-485 belongs to the classic Gould AEG Modicon 984-48x family programmable controller, designed for medium-scale industrial automation with both local and remote I/O expansion capability. This CPU executes LL984 ladder logic, supporting discrete interlock, analog PID closed-loop control, arithmetic operation and sequential control for production machinery and process lines. It carries built-in S908 remote I/O communication interface, which can run up to six remote I/O drops together with two local I/O racks, greatly expanding the control points for distributed field equipment. It integrates Modbus serial communication ports to connect programming terminal, local HMI and SCADA host, and supports peer data exchange and parameter upload/download. The front panel is equipped with LED status indicators and operation switches to display run mode, communication activity and hardware fault for fast on-site inspection and troubleshooting. It adopts battery backup to preserve user ladder logic and runtime register data when power is lost, and Modsoft or ProWORX32 is the matched programming software. Industrial-grade circuit design with built-in EMC filtering and surge suppression guarantees stable continuous operation under heavy electromagnetic interference caused by inverters, contactors and other power devices on factory floors. As an obsolete original spare part, it is widely used for maintenance and retrofit of aging Modicon 984 automation systems. Direct drop-in replacement keeps the existing control program, remote I/O layout and serial communication configuration unchanged, avoids large-scale system reconstruction and cuts production downtime.

Basic Parameters

Product type: Modicon 984 series programmable CPU controller

Part number: PC-0984-485

Series: 984-48x

Remote I/O: built-in S908, support up to six remote drops

Local rack: two local I/O racks

Communication: Modbus serial port, S908 remote I/O bus

Programming software: Modsoft, ProWORX32

Installation: rack mount for Modicon 984 dedicated backplane

Operating temperature: 0°C ~ +60°C

Protection grade: IP20

Supported Functions

LL984 ladder logic scanning and execution

Local and S908 remote I/O signal acquisition and output

Modbus RTU master and slave communication

PID closed-loop regulation and mathematical calculation

Program upload, download and online monitoring

Battery-backed retention of program and register data

Core Functions

Real-time logic solving and process sequence control

Onboard multi-status LED for run, comm and fault indication

Communication port transient surge and noise suppression

S908 bus polling for distributed remote I/O drops

Data frame verification and automatic retransmission

Diagnostic flag storage for processor and bus failures

Hardware Specifications & Environmental Features

Built-in noise filtering and surge protection circuit

Storage temperature: -25°C ~ +70°C

Relative humidity: 5% to 95% non-condensing

Status: Obsolete original part, available for spare replacement

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

Note:Confirm backplane compatibility, backup battery condition and S908 remote drop address before ordering.

This is from our current stock.

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