Technical Specifications

• Part Number: 51304439-275 (51304439275)

• Module Type: MC-TDIA52 (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 +65°C (extended high‑temp rating)

• Storage Temperature: -40°C to +85°C

• Humidity: 5%–95% RH, non‑condensing

• Dimensions (H×W×D): 270 × 185 × 95 mm (Size C, same as -200/-225)

• Weight: ~2.4 kg

• Certifications: CE‑compliant, UL‑listed (third‑party safety approval)

• Coating: Conformal coated (protection against dust, moisture, and mild corrosion)

• Terminals: Screw‑type (14–22 AWG, field‑friendly wiring)

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

• Current Draw: ≤3.5 W

Interface & Communication Configuration

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

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

• Redundancy: Supports redundant IOP configurations (high‑availability setups)

• 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 (32‑channel high density).

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

3. Conformal Coating Protection: Enhances reliability in humid, dusty, or mildly corrosive environments (vs. uncoated -200).

4. Screw‑Termination Field Wiring: Simplifies field installation and maintenance compared to compression terminals.

5. UL/CE Compliance: Meets global safety standards for use in regulated industrial environments.

6. Enhanced Thermal Performance: Operates reliably at ambient temperatures up to +65°C.

Application Scenarios

• Process Industries: Chemical, petrochemical, power generation, pulp & paper (harsh areas requiring UL/CE compliance).

• AC Device Monitoring: 120 VAC limit switches, motor starters, relay contacts, and panel status lights (high‑density I/O needs).

• Harsh Environments: High humidity, dust, or mild chemical exposure (non‑ATEX, UL‑required sites).

• Regulated Installations: Facilities needing both CE and UL certification for global compliance.

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

Key Differences: 51304439 Series Variants

Compatibility Note

• Form‑factor compatible with 51304439-200/-225 (same Size C, UCN connector).

• Functionally compatible with all 51304439 series (32‑channel 120 VAC input, UCN protocol).

• Recommended for new installations requiring screw terminals, conformal coating, and dual UL/CE compliance for harsh environments.