Model Number Explanation

51402625-175

5140: Honeywell DCS Core Hardware Series

26: UCN I/O Subseries

25: Digital Input (DI) Module

175: Wide-temperature version (-20°C to +60°C), 32-channel, SOE-enabled

Technical Specifications

Function: 32-channel Digital Input + SOE (Sequence of Events)

Channels: 32 DI channels, group-isolated

Input Type: Dry contact / Wet contact (24VDC / 125VDC selectable)

SOE Accuracy: 1ms time stamp, 1000-event buffer

Input Voltage: 24VDC (default), 125VDC optional

Input Current: ~10mA per channel

Isolation: 1500VAC (field-to-backplane), optical isolation

Processor: Local 32-bit MCU, HDW Rev F, FW Rev G

Communication: UCN, 5Mbps, redundant A/B network

Power: 5VDC backplane, ≤6W

Dimensions (mm): 220 × 120 × 30 (standard card size)

Weight: Approx. 0.62 kg

Operating Temperature: -20°C ~ +60°C (wide-range)

Compatibility: TDC3000 R500–R610, TPS R100–R120, Experion PKS C300

Interfaces & Configuration

Field Interface: 32-channel DI terminal block (group-isolated)

Backplane Interface: UCN chassis dedicated slot, hot-swappable

Front Panel LEDs: PWR, RUN, COM, FAULT, 32-channel status

Configuration: TPS/Experion software; adjustable debounce, SOE triggers, input type

Key Features

32-channel High-speed DI Acquisition: For relays, limit switches, pushbuttons, sensors

Precision SOE Logging: 1ms time stamps for accurate event sequencing and fault tracing

Signal Debounce & Filtering: Hardware/software filtering for noise immunity

Redundant Communication: UCN dual-network redundancy for data reliability

Self-diagnostics & Alarms: Real-time monitoring of channel, short, open, and communication faults

Applications

Systems: Honeywell TDC3000, TPS, Experion PKS (UCN architecture)

Typical Setup: UCN chassis + 51402625-175 + HPM Controller + Operator Stations

Industries: Oil & gas, power, petrochemical, metallurgy, water treatment

Use Case: Critical equipment status monitoring, interlock sequence analysis, safety system event recording

Compatibility & Replacement

Related Modules: UCN cables, DNCF chassis, HPM controllers, SOE history stations

Replacement Model:

51402625-125: Standard temperature (0°C to +50°C) version