Technical Specifications

• Part Number: 51304640‑125 (51304640125)

• Alternative ID: MU‑GDID12, 32‑Ch DI FTA, GI, 24VDC, Galvanic Isolator, CE

• Module Type: Field Termination Assembly (FTA), Digital Input Isolation (GI)

• System Compatibility: Honeywell UCN, TDC3000, TPS, C300 Controller, Experion PKS

• Input Channels: 32 isolated channels (24 VDC, sink/source configurable, dry contact or wet 24 VDC)

• Isolation Rating: 1500 VAC (channel‑to‑backplane), optical isolation per channel

• Input Voltage: 24 VDC ±10% (field side); 5 VDC (backplane logic)

• Input Current: 10 mA nominal per channel (on‑state)

• Response Time: <10 ms per channel (typical)

• Diagnostics: Channel‑level status LEDs; remote fault logging via UCN/C300

• Power: 24 VDC ±10%, 200 mA (external or backplane‑fed)

• Operating Temperature: 0°C to +60°C (industrial standard, GI‑rated)

• Storage Temperature: ‑40°C to +85°C

• Humidity: 5%–95% RH, non‑condensing

• Dimensions (H×W×D): 152 × 178 × 25 mm (7‑inch FTA, high‑density)

• Weight: ~0.45 kg

• Coating: Standard (non‑conformal)

• Certifications: CE, RoHS, UL 508 compliant

• Revisions: Common Rev B/C (hardware/firmware, CE‑enhanced)

• Status: Active (new surplus/repair available; backward compatible with 51304640‑175/225/325/375)

Interface & Communication Configuration

• Host Interface: UCN/TDC3000/C300 backplane (proprietary, 1 Mbps I/O Link)

• Field Interface: 32 × screw terminals (GI‑rated, isolated per channel, 24 VDC common)

• Protocol Support: UCN digital input protocol; compatible with all Honeywell UCN/C300 digital controllers

• Diagnostics: 32 channel LEDs (On/Off); 2 global LEDs (Power, Fault); remote alarm via UCN/C300

• Hot Swap: Yes (replace without system shutdown; auto‑reconnect in <5 seconds)

• Compatibility: Drop‑in replacement for 51304640‑175/225/325/375; works with MU‑GAOX12, MC‑TAIH15, and other UCN FTAs; non‑redundant design

Core Functions

1. High‑Density Input: 32‑channel digital input (vs 16‑channel standard) saves cabinet space for large I/O systems.

2. 24 VDC Galvanic Isolation: Optical isolation protects system from field noise and voltage spikes.

3. GI‑Rated Operation: Designed for non‑hazardous industrial environments (general interface).

4. Wide Signal Compatibility: Accepts dry contact closures or wet 24 VDC signals from switches, pushbuttons, and sensors。

5. Channel‑Level Diagnostics: Individual LEDs enable quick fault isolation; remote monitoring enhances maintainability.

Application Scenarios

• General Industrial Process Control: Manufacturing, food & beverage, water treatment, and power facilities (non‑hazardous areas).

• High‑I/O Density Monitoring: Large‑scale discrete signal monitoring (limit switches, level sensors, pushbuttons).

• 24 VDC Signal Systems: Facilities using standard 24 VDC field devices for digital input.

• Legacy System Upgrades: Expanding TDC3000/TPS/C300 systems with high‑density, CE‑compliant digital I/O.

Compatibility Note

• System Compatibility: Honeywell UCN, TDC3000, TPS, C300 Controller, Experion PKS (requires UCN/C300 digital controller card)

• Replacement Cross‑Reference:

  • 51304640‑125: 32‑ch, GI, 0–60°C, screw terminals, CE, non‑CC

  • 51304640‑175: 32‑ch, GI/IS, 0–60°C, screw terminals, CE, CC

  • 51304640‑225: 16‑ch, GI, 0–60°C, screw terminals, CE, non‑CC

  • 51304640‑325: 32‑ch, GI/IS, 0–60°C, crimp terminals, CE, non‑CC

  • 51304640‑375: 32‑ch, GI/IS, 0–60°C, crimp terminals, CE, CC

• Key Difference (125 vs others): The 125 is the base 32‑ch GI model (non‑IS, non‑CC, screw terminals) for cost‑effective general industrial use.