Model Explanation

51401201-100: Honeywell part number (written as 51401201100)

51401201 = UCN 24VDC DI FTA series

100 = Standard version, Rev A hardware, 32 channels, 24VDC input

Component Type: FTA (Field Termination Assembly) Field Terminal Board

Compatible Systems: TDC 3000, TPS (UCN network)

Alternative Model: No direct alternative, UCN-specific 24VDC DI terminal board Technical Specifications

Channel count: 32 digital inputs (DI)

Input signal: 24VDC (±10%), dry contact / wet contact compatible

Input type: sink/source selectable (board jumper)

Isolation: Channel - backplane 1500VAC, channel-to-channel 500VAC (optical isolation)

Response time: ≤ 8ms / channel

Backplane interface: UCN dedicated I/O bus, 5Mbps

Power supply: 24VDC (backplane, ±10%), power consumption ≤ 7W

Operating temperature: 0°C ~ +60°C

Storage temperature: -40°C ~ +85°C

Humidity: 5% ~ 95% RH (no condensation)

Size: Standard 19-inch card (3U), UCN I/O slot

Weight: Approximately 0.5kg

Certifications: CE, UL, CSA, FM

Interface and Configuration

External interface: 32 screw terminals (2 pins per channel), status LED (CH1~CH32)

Backplane interface: UCN cabinet gold finger, dedicated high-speed data bus

Configuration method: Board jumper (channel enable, sink/source, termination resistor) + system software configuration

Redundancy: Supports 1:1 hot redundancy with UCN DI module, automatic fault switching

Compatibility: Compatible with TDC 3000 UCN full version, compatible with MU-TDID11 series modules Core function

32-channel 24VDC digital input acquisition: Directly connect to on-site 24VDC switches, relay contacts, limit switches, proximity switches, etc. Filtering and anti-jamming, level conversion, ensuring stable signals.

Optical isolation anti-interference: High-voltage optical isolation, suppressing on-site EMI/RFI interference, surges, protecting the DCS backplane and modules.

Channel status monitoring: Each channel has an LED indicator, intuitively displaying on/off/fault status, facilitating inspection and maintenance.

UCN network data interaction: The acquired signals are transmitted to the controller via the UCN bus, supporting real-time monitoring, alarms, and interlocks.

Fault self-diagnosis: Built-in open circuit / short circuit / overpressure diagnosis, real-time reporting of faults, quickly locating the channel. Applicable scenarios

System: Honeywell TDC 3000, TPS (UCN network)

Equipment: UCN cabinet, UCN DI module, 24VDC field sensors / switches

Industry: Petrochemicals, thermal power, metallurgy, water treatment, oil and gas, pharmaceuticals

Application: On-site switch status monitoring, equipment start-stop interlock, safety circuit monitoring, instrument contact point collection