Description

Product Overview

The IMDSM04 is an 8-channel high-speed pulse counting slave I/O module for legacy ABB Bailey INFI 90 and Symphony distributed control systems. It captures pulse, frequency and quadrature encoder signals from flow transmitters, speed pickups and incremental encoders, delivering totalized flow, rotational speed and displacement data to master control modules over the module slave bus. Each channel is independently configurable for input level and debounce, with hardware 32‑bit counters for stable high‑speed acquisition. It requires a matched termination unit, NTDI01 or NIDI01, for field wiring. It is widely stocked as a replacement spare for power, pulp & paper, chemical and refinery DCS retrofits.

Technical Specifications

• Brand: ABB Bailey
• Model: IMDSM04
• Warranty: One Year
• Condition: 100% New & Original
• Channels: 8 independent isolated pulse input channels
• Input Signal Levels: 50 mVpp–10 Vpp, 4–6 VDC, 21.6–27 VDC, configurable via jumpers
• Max Input Frequency: Up to 1 MHz per channel
• Counter: 32-bit hardware counter
• Trigger: Rising / falling edge selectable; software configurable for quadrature encoder A/B/Z
• Debounce: Per-channel jumper selectable (no debounce or 8.5 ms)
• Backplane Supply: +5 VDC from IEMMU11 rack backplane
• Operating Temp: -25°C to +60°C
• Isolation: Opto-isolation between field side and backplane
• Matching Termination: NTDI01 / NIDI01
• Mounting: Standard INFI 90 Harmony rack slot
• Hot Swap: Supported
• Diagnostics: Front LED indicators for power, bus and channel faults
• Weight: Approx. 0.48 kg
• Origin: Sweden
• Certifications: CE
• Lifecycle: Obsolete legacy spare; modern equivalent SPDSM04 for Symphony Plus