Product Overview

• Part No: DSDX453
• Brand: ABB

• Category: Digital I/O Expansion UnitDSDX453 is a digital expansion unit belonging to ABB Advant Master S400 remote I/O series. It provides abundant digital input and relay output channels, used for expanding signal collection and drive capacity of the basic I/O unit. The module collects digital status signals from field equipment and receives control commands from the main controller to drive on-site actuators, realizing signal interaction between the control system and field devices. It is widely deployed as extended I/O equipment in distributed process control cabinets.

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Core Features

• Integrated 20-channel digital input and 12-channel relay output, meeting multi-point signal expansion requirements
• Relay output supports AC and DC loads, suitable for controlling valves, indicators and contactors
• Independent channel status LED indicators, convenient for field inspection and fault diagnosis
• Reliable internal isolation design, effectively resisting electromagnetic interference in industrial cabinets
• Compact unit structure, easy installation and direct replacement for maintenance

• Real-time operating status monitoring, working cooperatively with base I/O unit through dedicated bus

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Technical Specifications

• Digital Input: 20 channels, 48VDC
• Digital Output: 12 channels, relay contact output
• Communication: Dedicated bus connection matched with basic I/O unit
• Operating Temperature: -20°C ~ +60°C

• Protection Class: IP20, indoor cabinet installation

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Compatibility & Application

• Compatible with ABB Advant Master S400 remote I/O system and supporting basic units
• Applied in power plants, pulp and paper industry, chemical, metallurgy and water treatment process control
• Used for equipment status feedback, interlock signal collection and on-site actuator drive control