Foxboro DM400YT (FBM17) – Contact/DC Input/Output Module Product Overview Model: DM400YT (FBM17) Type: 16-channel isolated contact/DC digital input/output expansion module System: Foxboro I/A Series DCS (expansion for FBM09) Core Specifications Input Type: Dry contact / 5–30VDC (sink/source) Output Type: Dry contact relay, 30VDC / 250VAC, 2A per channel Channel Count: 16 (8 input / 8 output, isolated) Isolation: 250VACrms (channel-to-channel, channel-to-ground) Response Time: ≤8ms (input); ≤10ms (output relay) Backplane Power: 24VDC ±10% Power Consumption: ≤3.8W Operating Temp: 0°C to +55°C (32°F to 131°F) Storage Temp: -40°C to +85°C (-40°F to 185°F) Humidity: 5%–95% RH, non-condensing Dimensions (D×W×H): 18.0" × 6.25" × 1.5" Weight: ~0.9 kg (2.0 lbs) Hot Swap: Supported (online replacement) Diagnostics: Open/short detection, channel LED, relay coil monitoring Installation & Wiring Mounting: Single-slot vertical install in I/A 100-series chassis; ≥50mm top/bottom clearance for airflow. Cable: Shielded twisted pair (18–22 AWG); max length 250m (I/O). Shielding: Shield grounded at control room end only; avoid ground loops. Separation: Keep DC I/O ≥30cm from AC/high-voltage cables. Terminals: Torque to 0.8–1.0 N·m; use ferrules on stranded wire. ESD: Anti-static wristband required; do not touch gold edge connectors. Output Load: Max 2A/channel; use freewheeling diodes for inductive loads. Operation & Maintenance LED Indicators: PWR: Green = Backplane power good RUN: Green blink = Normal communication FAULT: Red = Channel fault, relay overload, or comm error Redundancy: Supports dual-module redundant pairing; switchover <50ms. Maintenance: Inspect/retorque terminals annually. Clean chassis/module dust every 6–12 months. End-of-life: Discontinued; no field repair – replace with spare. Compatibility Direct Replacement: FBM17, DM400YT-0C System Compatibility: I/A Series 100-series; works with CP10/30/60 controllers. Mate Module: FBM09 (CM400YK) – main 8DI/8DO module. Upgrade Alternative: FBM247 (I/A 200-series, Ethernet-based 16-channel DC I/O). Spare Notes: Only refurbished/used units available; DM400YT is the expansion counterpart to CM400YK (FBM09).