Product Details

Modicon AS-B352-001 is a rugged 8 channel 24VDC true-low discrete output module and reliable digital control card belonging to the Modicon 300 series I/O family for Modicon 984 PLC racks. This 24vdc output card receives on/off commands from the host CPU over the backplane and drives field actuators including solenoid valves, contactors, indicator lamps and small DC loads. It adopts true-low output logic and each channel is equipped with built‑in transient suppression to absorb inductive kickback from switching loads, protecting both the module and the PLC backplane. Individual LED indicators on the front panel display the real-time status of every output point for fast visual inspection, and the integrated screw terminal block provides stable wiring connection for field cables. Built with industrial-grade components, this discrete output module can operate continuously under vibration, dust and fluctuating power conditions on production floors. As a discontinued legacy spare, this digital control card serves as a drop-in replacement to restore 24 VDC discrete load switching capability for ageing Modicon 984 automation racks.

Basic Parameters

Brand: Modicon (AEG / Gould legacy)

Model: AS-B352-001

Product Type: 8-Channel 24VDC True-Low Discrete Output Module

Compatible Rack: Modicon 300 series backplane, Modicon 984 series PLC controllers

Output Quantity: 8 discrete output channels

Rated Voltage: 24 VDC, true-low logic

Load Type: Resistive and inductive DC loads

Termination: Integrated screw terminal block

Indicator: Front LED for each channel operating status

Form Factor: Single-slot rack mount

Product Status: Discontinued, end of original production

Net Weight: Approximately 0.85 kg

Supported Functions

This discrete output module executes discrete switching instructions transmitted by the Modicon CPU. The digital control card maintains stable on/off control for connected DC field loads and supports independent point control for sequence interlock, equipment startup and shutdown, and alarm indication. This 24vdc output card runs built-in self-diagnosis to detect backplane communication faults and internal circuit anomalies. When communication with the main CPU is lost, it holds outputs at a predefined safe state to avoid unexpected equipment movement. It can cooperate with other discrete input, analog and communication modules to build a complete legacy control system for continuous and batch processes.

Core Functions

As a dedicated digital control card, this discrete output module converts logic commands from the PLC into physical switching signals for field devices. Its true-low design matches many traditional industrial sensor and actuator wiring schemes, while onboard surge suppression reduces damage risk caused by inductive loads. This 24vdc output card works as a direct spare to rebuild reliable DC discrete load 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 industrial single-slot module

Protection: Channel transient suppression, backplane watchdog monitoring

Anti-interference: Filtered output circuits to suppress switching noise

Compatibility: Modicon 300 series chassis, Modicon 984 CPUs, matching 300 series I/O 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 300 series backplane compatibility, true-low wiring logic, 24VDC load rating and inductive load protection before ordering.

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