ABB IMDSI22 Bailey INFI 90 Digital Input Module

Description

The ABB IMDSI22 is a digital input module designed for use within the ABB Symphony Harmony and INFI 90 Distributed Control Systems (DCS). It functions as an interface between field digital sensing devices and the Harmony Control Unit (HCU). The IMDSI22 accepts up to 16 digital input signals from field contact closures or voltage sources, processing these signals for real-time monitoring, event sequence recording, and process control logic execution.

Features

• Accepts up to 16 discrete digital input channels
• Interfaces field contact closures directly to the Symphony Harmony system bus
• Optically isolates field signals from internal system logic to prevent ground loops and surge damage
• Provides onboard status LED indicators for module health and individual channel input activity
• Supports high-speed event detection and field state monitoring
• Designed for hot-swappable installation within standard Harmony module mounting units

Applications

• Power generation process monitoring and interlocking
• Oil and gas pipeline discrete state acquisition
• Chemical processing plant alarm and trip monitoring
• Industrial motor control center contact feedback integration
• General factory automation discrete signal sensing

Technical Specifications

Installation Guidelines

• Ensure the Module Mounting Unit (MMU) slot address and keying match the designated layout for the digital input module.
• Insert the module firmly into the chassis guide rails until the backplane connectors seat completely.
• Verify field wiring connections on the corresponding termination unit prior to applying power to field contacts.
• Connect cable shielding directly to the system cabinet earth ground point to mitigate electromagnetic interference.
• Avoid routing field input signal cables parallel to high-voltage power lines or heavy motor drives.