Technical Specifications

• Part Number: 51304439-125 (51304439125)

• Module Type: MU-TDIA12 (Digital Input FTA)

• Channel Configuration: 32 × galvanically isolated digital input channels

• Input Voltage: 120 VAC ±10%, 50/60 Hz

• Input Type: Dry contact or wet AC voltage

• Isolation: 1500 VAC rms (channel‑to‑backplane)

• Response Time: ≤10 ms per channel

• Power Supply: 24 VDC ±10%, 0.5 A (backplane‑powered)

• Operating Temperature: -20°C to +60°C

• Storage Temperature: -40°C to +85°C

• Humidity: 5%–95% RH, non‑condensing

• Dimensions (H×W×D): 307 × 120 × 50 mm (12‑inch size B)

• Weight: ~1.3 kg

• Certifications: CE‑compliant, Non‑UL

• Coating: Non‑conformal coated (standard environment only)

• Terminals: Compression‑type (14–22 AWG)

• Status Indicators: Power/Fault LED, channel status LEDs

• Current Draw: ≤3 W

Interface & Communication Configuration

• DCS Interface: UCN backplane edge connector (1 Mbps, TDC3000/TPS compatible)

• Field Interface: Compression terminals (32 channels for 120 VAC inputs)

• Redundancy: Non‑redundant (single‑controller operation)

• Diagnostics: On‑board self‑diagnostics with fault reporting via UCN

• Wiring: Accepts 14–22 AWG stranded copper wire

• Connector: UCN 96‑pin edge connector

Core Functions

1. AC Digital Input Monitoring: Captures 120 VAC discrete signals from switches, relays, and contactors.

2. Galvanic Isolation: Protects DCS from high‑voltage transients, ground loops, and electrical noise.

3. Field Termination: Centralizes 32‑channel AC digital wiring to DCS IOPs.

4. Status Indication: LED per channel for quick fault/status visualization.

5. Noise Immunity: Designed for industrial AC environments with high electrical interference.

Application Scenarios

• Process Industries: Chemical, petrochemical, power generation, pulp & paper (standard areas, CE‑required).

• AC Device Monitoring: Limit switches, motor starters, relay contacts, and panel status lights (120 VAC).

• General Industrial Environments: Non‑harsh areas with normal humidity, dust, and temperature conditions.

• CE‑Certified Installations: Cost‑effective solutions for sites requiring CE compliance (non‑UL).

• Legacy TDC3000/TPS Systems: Replacement or expansion of existing UCN‑based DCS.

Key Differences: 51304439 Series Variants

Compatibility Note

• Pin‑compatible with 51304439-100 and -175; direct replacement in TDC3000/TPS UCN racks.

• Recommended for new non‑redundant installations in standard environments requiring CE (but not UL) compliance.