Model Explanation

51401220-100: Honeywell part number (written as 51401220100)

51401220 = UCN 24VDC DO FTA series

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

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

Compatible Systems: TDC 3000, TPS (UCN network)

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

Channel count: 32 digital outputs (DO), each channel is independently isolated

Output signal: 24VDC (±10%), source type output (sourcing)

Load capacity: Maximum 500mA per channel, total load ≤ 8A

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

Response time: ≤ 5ms / channel

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

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

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 0.55kg

Certifications: CE, UL, CSA, FM

Interface and Configuration

External interfaces: 32 screw terminals (each channel 2 cores: +/−), status LED (CH1~CH32)

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

Configuration method: Built-in jumpers (channel enable, fault alarm, termination resistor) + system software configuration

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

Compatibility: Compatible with TDC 3000 UCN full version, compatible with UCN DO series modules Core function

32-channel 24VDC digital signal output: Receives controller instructions and outputs 24VDC level signals, directly driving relays, solenoid valves, contactors, indicator lights and other on-site actuators.

Photoelectric isolation anti-interference: High-voltage photoelectric isolation, suppressing backplane interference and surge voltage, protecting on-site equipment and the DCS system.

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

UCN network data interaction: Receives controller output instructions, supporting interlock control, equipment start/stop, alarm output and other functions.

Fault self-diagnosis: Built-in open circuit/short circuit/overload diagnosis, reporting faults in real time, quickly locating faulty channels. Applicable scenarios

System: Honeywell TDC 3000, TPS (UCN network)

Equipment: UCN cabinet, UCN DO module, 24VDC relay / solenoid valve / indicator light

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

Application: Equipment start-stop control, valve opening interlock, alarm light driving, motor control loop