Overview

The ABB DI840 (3BSE020836R1) is a 16-channel digital input module in the S800 I/O family, designed for reliable signal acquisition from field devices in distributed control systems. It supports 24 VDC inputs, galvanic isolation, channel diagnostics, and LED indicators for robust operation in mission-critical environments.

The module integrates with ABB AC 800M controllers and System 800xA, supporting both redundant and non-redundant configurations. Its compact design and DIN-rail mounting simplify installation and maintenance.

Technical Data

Typical Applications

• Power generation: Monitors turbine sensors, excitation systems, and auxiliary equipment.

• Process industries: Acquires signals from switches, limit sensors, and interlocks in chemical, oil & gas, and pharmaceutical plants.

• Water treatment facilities: Reads pump status, valve positions, and monitoring equipment signals.

• Manufacturing automation: Captures inputs from robotic systems, conveyors, and machine interlocks.

• Infrastructure systems: Used in building automation and utility monitoring networks.

Example:
In a steel plant, the DI840 collects digital signals from limit switches and safety interlocks, ensuring rapid control system response to protect machinery and personnel.

FAQ

Q1: What is the ABB DI840 used for?
It is a digital input module that acquires 24 VDC signals from field devices.

Q2: How many channels does it provide?
16 digital input channels.

Q3: Does it support redundancy?
Yes, it supports redundant configurations with AC 800M controllers.

Q4: What diagnostics are available?
LED indicators and error detection for each channel.

Q5: Which ABB systems are compatible?
System 800xA, AC 800M controllers, and S800 I/O modules.