Technical Specifications

• Part Number: 51304439-175 (51304439175)

• Module Type: MC-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 (rated; can extend to -40°C to +70°C for limited use)

• 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, UL, ATEX (harsh area compliant)

• Coating: Conformal coated (protection against dust, moisture, chemicals)

• 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/Experion PKS compatible)

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

• Redundancy: Supports redundant IOP configurations (high‑reliability systems)

• 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, contactors, and limit switches.

2. Galvanic Isolation: 1500 VAC isolation protects DCS from high‑voltage transients, ground loops, and electrical noise.

3. Harsh Environment Protection: Conformal coating and full agency certifications ensure reliability in corrosive, humid, or explosive atmospheres。

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

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

Application Scenarios

• Process Industries: Oil & gas, chemical, petrochemical, power generation, pulp & paper (harsh/explosive areas)。

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

• Harsh Industrial Environments: High humidity, dust, chemical exposure, or temperature extremes.

• Certified Installations: Sites requiring CE/UL/ATEX compliance (e.g., offshore, hazardous zones)。

• Legacy & Modern DCS: Replacement/expansion for TDC3000/TPS and integration with Experion PKS C300 controllers。

Key Differences: 51304439 Series Variants

Compatibility Note

• Pin‑compatible with 51304439-100 and -125; direct replacement in TDC3000/TPS UCN racks.

• Recommended for critical/harsh‑environment installations requiring full agency certifications and conformal coating。