Product Details

Modicon AS-BDAP-208, also known as DAP208, is a reliable 8-point relay output module and discrete control card belonging to the Modicon TSX Compact legacy I/O family under AEG Modicon. This tsx compact output card provides isolated relay contacts to switch external loads, accepting either 24 VDC or up to 230 VAC circuit power, with each channel rated for 2 A continuous current. It receives on / off commands from the host Modicon CPU over the Compact backplane and actuates field devices such as solenoid valves, contactors, indicator lamps and small motor starters. Each relay channel features galvanic isolation between the PLC logic side and the field load side, which effectively protects the controller backplane from surge, short-circuit and inductive kickback generated by switching loads. Front-mounted LED indicators clearly show the status of each output point for fast visual inspection, and the removable screw terminal block simplifies field wiring and module replacement. As a discontinued legacy spare, this relay output module serves as a drop-in replacement to restore discrete load switching capability for ageing Modicon TSX Compact automation racks.

Basic Parameters

Brand: Modicon (AEG / Schneider legacy)

Model: AS-BDAP-208, alias DAP208

Product Type: 8-Point Isolated Relay Discrete Output Module

Compatible Rack: Modicon TSX Compact backplane and 984 series PLC controllers

Output Quantity: 8 isolated relay channels

Rated Current: 2 A per channel

Load Voltage Range: 24 VDC, up to 230 VAC

Isolation: Galvanic isolation per relay channel

Termination: Removable screw terminal block

Indicator: Front LED for each output channel status

Form Factor: Single-slot rack mounting

Product Status: Discontinued, end of original production

Net Weight: Approximately 0.23 kg

Supported Functions

This relay output module executes discrete switching orders transmitted by the PLC processor. The discrete control card can maintain stable on / off control for a wide variety of resistive and inductive field loads. This tsx compact output card supports independent channel control, allowing the program to trigger individual relays for sequence interlock, alarm indication and equipment startup or shutdown. It runs built-in self-diagnostics to detect backplane communication faults, and it will hold outputs at a predefined safe state when communication fails. It can work together with other Compact input, analog and counter modules to build a complete legacy control system for batch and continuous processes.

Core Functions

As a dedicated discrete control card, this relay output module acts as an electrical isolation interface between the low-voltage PLC logic and high-energy field loads. Its relay contacts provide flexible voltage switching without strict polarity limits, which greatly improves adaptability for mixed AC and DC field devices. This tsx compact output card works as a direct spare to rebuild reliable 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: Compact industrial plastic single-slot module

Protection: Relay surge suppression, backplane watchdog protection

Anti-interference: Galvanic isolation blocks load-side noise and voltage transients

Compatibility: Modicon TSX Compact chassis, Modicon 984 CPUs, Compact 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 TSX Compact backplane compatibility, load voltage, per-channel current and relay contact life before ordering.

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