TheABB IMDSI12is a versatile 16-channelUniversal Digital Input Slave Module utilized within the Symphony Plus and Harmony (Infi 90) control systems.It is designed to interface field-level discrete signals—such as limit switches, pushbuttons, and relay contacts—with the system's master controllers. Its "universal" designation stems from its ability to process a wide variety of input voltages, making it a flexible solution for diverse industrial environments.
Specifications
Model Number:IMDSI12
Input Channels:16 isolated digital input channels.
Voltage Ranges:Supports 24 VDC, 48 VDC, 125 VDC, and 120 VAC.
Input Current:Typically 2.5 mA to 5 mA depending on the input voltage.
Isolation:1500 V RMS channel-to-channel and channel-to-system isolation.
Power Requirements:Consumes 2.5 Watts (typical) from the +5 VDC system bus.
Response Time:Software-configurable filtering ranging from 1 ms to 20 ms.
Address Range:Configurable slave address via on-board dip switches (0–63).
Features
Universal Input Logic:Capable of sensing both AC and DC voltages, allowing a single module type to be standardized across an entire plant.
High Signal Integrity:Features robust opto-isolation for every channel, protecting the control logic from field-side electrical surges and noise.
Individual Channel LEDs:Front-panel indicators provide real-time status (On/Off) for each of the 16 inputs, simplifying site inspections.
Flexible Filtering:Intelligent onboard processing allows users to adjust digital filter constants to eliminate contact bounce from mechanical switches.
System Redundancy:Fully compatible with redundant Slave Bus architectures, ensuring continuous data flow even if a communication path is compromised.
Easy Maintenance:The module is designed for quick insertion into Harmony rack slots, with configuration settings easily accessible via physical switches.
