Technical Specifications

• Part Number: 51304441-275 (51304441275)

• Module Type: MC-TDID52 (Digital Input FTA)

• Channel Configuration: 32 × galvanically isolated digital input channels

• Input Voltage: 24 VDC ±10% (dry contact or wet DC voltage)

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

• Response Time: ≤5 ms per channel (supports SOE recording)

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

• Operating Temperature: -40°C to +75°C (ultra‑extreme harsh rating)

• Storage Temperature: -40°C to +85°C

• Humidity: 5%–95% RH, non‑condensing (corrosion‑resistant coating)

• Dimensions (H×W×D): 270 × 185 × 95 mm (Size C, 18‑inch form factor)

• Weight: ~1.4 kg (compact reinforced housing)

• Certifications: CE‑compliant, UL‑listed, RoHS‑compliant

• Coating: Enhanced+ conformal coating (ultra‑extreme harsh environment protection)

• Terminals: Heavy‑duty screw‑type (12–22 AWG, vibration‑resistant)

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

• Current Draw: ≤4.0 W

• Vibration Resistance: 5g, 10–500 Hz (industrial vibration tolerance)

Interface & Communication Configuration

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

• Field Interface: Heavy‑duty screw terminals (32 channels for 24 VDC inputs)

• Redundancy: Supports redundant IOP (Input/Output Processor) configurations

• Diagnostics: On‑board self‑diagnostics with fault reporting via UCN; LED status for quick troubleshooting

• Wiring: Accepts 12–22 AWG stranded copper wire (heavy‑gauge compatibility)

• Connector: UCN 96‑pin edge connector (gold‑plated contacts for reliability)

Core Functions

1. 24 VDC Digital Input Monitoring: Captures low‑voltage discrete signals from switches, relays, and sensors (32‑channel high density for ultra‑extreme environments).

2. Galvanic Isolation: 1500 VAC isolation protects DCS from electrical noise, ground loops, and voltage spikes in harsh plants.

3. Fast Response: 5 ms response time enables accurate sequence‑of‑events (SOE) logging for critical process troubleshooting.

4. Enhanced+ Conformal Coating: Provides superior protection against moisture, dust, corrosive gases, and chemical vapors (ideal for chemical/petrochemical/offshore zones).

5. CE/UL/RoHS Compliance: Meets global safety and environmental standards for international deployments.

6. Heavy‑Duty Termination: Vibration‑resistant screw terminals for high‑vibration areas (e.g., power plants, heavy machinery zones).

7. Ultra‑Extended Temperature Range: Operates reliably at up to +75°C and down to -40°C for the most extreme industrial environments.

Application Scenarios

• Process Industries: Chemical, petrochemical, power generation, pulp & paper, offshore oil & gas (ultra‑extreme harsh environments requiring CE/UL/RoHS).

• Harsh Environment Monitoring: Outdoor installations, high‑humidity areas, corrosive industrial zones, high‑vibration facilities, and extreme‑temperature zones.

• Low‑Voltage Device Monitoring: 24 VDC limit switches, proximity sensors, relay contacts, and panel status lights in ultra‑harsh conditions.

• Legacy DCS Systems: Replacement/expansion for Honeywell TDC3000/TPS installations in harsh plant areas.

• Global Deployments: Facilities requiring CE, UL, and RoHS markings for compliance.

• Ultra‑Extreme Temperature Zones: Industrial areas with ambient temperatures ranging from -40°C to +75°C.

Key Differences: 51304441 Series Variants

Compatibility Note

• Form‑factor compatible with other 51304441 series (Size C, UCN connector).

• Functionally compatible with 51304439 series (32‑channel isolated input, UCN protocol, different voltage).

• Recommended for legacy TDC3000/TPS systems needing 24 VDC inputs in ultra‑extreme+ harsh environments with CE/UL/RoHS compliance.