Description

Product Overview

The IMDSI12 is a 16‑channel universal discrete input slave module for ABB Bailey INFI 90 and Harmony Symphony DCS. It reads dry contact closures and AC/DC level signals from limit switches, relay status, valve feedback and interlock sensors, and transfers status data to MFP multifunction controllers over the I/O slave bus. Voltage range is selected via on‑board jumpers, and a fixed 17 ms hardware debounce suppresses switch bounce. It mates with NTDI01 termination unit and can replace older IMDSI02. It is widely stocked for power, pulp & paper, chemical and refinery interlock and sequence monitoring loops.

Technical Specifications

• Brand: ABB Bailey
• Model: IMDSI12
• Warranty: One Year
• Condition: 100% New & Original
• Channels: 16 optically isolated digital input channels
• Supported Signals: Dry contact, 24 VDC, 48 VDC, 125 VDC, 120 VAC (jumper selectable)
• Debounce: Fixed 17 ms
• Isolation: 1500 VDC isolation between field side and backplane logic
• Backplane Supply: +5 VDC from IEMMU rack
• Operating Temp: -25°C to +60°C
• Communication: INFI 90 slave bus to MFP / MFC controllers
• Matching Termination: NTDI01
• Family Differentiation:
  • IMDSI12: multi‑voltage universal DI
  • IMDSI13 / IMDSI14 / IMDSI15: other voltage variants
  • SPDSI14: Symphony Plus successor
• Mounting: Standard Harmony rack single slot
• Hot Swap: Supported
• Diagnostics: Front LED indicators for power, bus and module faults
• Weight: Approx. 0.19 kg
• Origin: Sweden
• Certifications: CE, UL
• Lifecycle: Obsolete legacy spare