1. General Information

• Part Number: 51304640225 (51304640‑225)

• Model: MU‑GDID12

• Manufacturer: Honeywell

• Product Type: 12‑Channel Isolated Digital Input (DI) Module

• Applicable Systems: TDC3000, TPS, Experion PKS (UCN)

• Status: Discontinued (spare parts only)

• Form Factor: Rack‑mount plug‑in module

• Weight: Approx. 330 g

• Dimensions: ~115 × 75 × 20 mm

2. Features & Functions

• 12 Independent Isolated Input Channels: Reads dry contact or 24 VDC field ON/OFF signals

• Galvanic Isolation: 1500 V AC rms (field‑to‑logic, 1 minute)

• High‑Speed Response: <5 ms per channel

• LED Status Indicators: Per‑channel ON/OFF + Power/Fault LEDs

• Hot‑Swappable: Online replacement without system shutdown

• Conformal Coating: Withstands moisture, dust, chemicals in harsh environments

• Certifications: CE, UL508, CSA compliant

3. Technical Specifications

3.1 Electrical

• Input Signal: 24 VDC nominal (dry contacts, sensors, relays)

• Logic HIGH: 18–30 VDC; Logic LOW: <5 VDC

• Input Current: ~10 mA per channel (@24 VDC)

• Isolation Voltage: 1500 V AC rms (1 minute)

• Response Time: <5 ms

• Power Supply: 24 VDC ±10% (system‑side)

• Power Consumption: ≤4 W

3.2 Environmental

• Operating Temperature: ‑20°C to +70°C

• Storage Temperature: ‑40°C to +85°C

• Relative Humidity: 5%–95%, non‑condensing

• Protection Class: IP20 (front)

3.3 Mechanical

• Mounting: Standard Honeywell I/O rack

• Wiring: Screw terminals (field side) + ribbon cable (system side)

4. Applications

• System Role: Digital signal acquisition in DCS/process control

• Industries: Petrochemical, power generation, water treatment, metallurgy

• Field Devices: Limit switches, pushbuttons, proximity sensors, relay contacts

5. Compatibility & Accessories

• Compatible With: Honeywell TDC3000, TPS, Experion C300 (UCN network)

• Accessories: 24 VDC power supply, I/O rack, shielded twisted‑pair cable