Honeywell 51204174125 Product Detailed Description

Product Model: 51204174125 (Standard Number: 51204174-125)

Brand: Honeywell

Product Category: UCN Advanced Analog Input FTA Module (HLAI FTA, Redundant CE Certified Version)

Applicable Systems: Honeywell TDC 3000 / TPS / UCN Distributed Control System (DCS)

I. Product Overview

51204174125 is a dual-channel redundant, CE-certified high-precision input module (High Level Analog Input Field Termination Assembly) in the 51204174 series of Honeywell UCN systems. It is designed for high-reliability scenarios such as EU export, safety interlock, and continuous data collection, receiving 4–20 mA standard analog signals, featuring complete redundancy, 16-bit high precision, electrical isolation, CE/RoHS compliance, and is the core redundant input module in the 51204174 series for international markets.

II. Core Specification Parameters

1. Signal Specifications

Input Type: Standard High-Level Analog (4–20 mA DC, two-wire / four-wire compatible)

Channel Count: 8 Independent Input Channels (Redundant Architecture, Dual Channel Redundancy)

Accuracy: ±0.075% Full Scale (FS) @ 25°C

Resolution: 16-bit A/D Conversion

Input Impedance: ≤ 50 Ω (Low Loss, Suitable for Long Distance Transmission)

Electrical Isolation: Channel - System ≥ 1500 V AC

Common Mode Suppression Ratio: > 110 dB (50/60 Hz)

Sampling Rate: 10 times / second / channel

Input Protection: Overcurrent (±30 mA), Overvoltage (±30 V), Reverse Connection, Surge Protection

2. Electrical Parameters

Operating Power Supply: 24 V DC Redundant Input (Backplane Dual Power Supply)

Power Consumption: ≤ 4 W (Redundant Mode)

Power Supply Redundancy: Supports Power Module Redundant Switching

Grounding: Independent Safety Grounding, Compliant with IEC Standards

3. Environmental Parameters

Operating Temperature: -40°C ～ +70°C

Storage Temperature: -55°C ～ +85°C

Humidity: 5% ～ 95% RH (Non-condensing)

Protection Grade: IP20 (Installed in Cabinet)

Vibration / Shock: Compliant with IEC 60068 Industrial Standards

EMC: CE EN 61326, FCC Part 15 Class A

4. Physical Characteristics

Size: Standard UCN Card (300 mm × 100 mm × 20 mm)

Weight: Approximately 0.5 kg

Installation: UCN Rack Slot, Hot Swap

Interface: Front Spring-Type Terminal + Backplane Redundant Bus Interface

5. Certification (Core Features)

CE Certification: Compliant with EU Low Voltage Directive (LVD), Electromagnetic Compatibility (EMC)

RoHS Compliance: Lead-Free Environmentally Friendly, EU Market Access

Others: UL, CSA Industrial Certification

III. Functional Characteristics (Redundancy + CE Core Advantages)

1. Complete Redundancy Architecture (Key Features)

Dual Channel Redundancy: Main / Backup Channel Automatically Seamless Switching (Switching Time < 50 ms)

Power Redundancy: Dual 24 V DC Inputs, One Failure Does Not Affect Acquisition

Bus Redundancy: Backplane Redundant Bus, Supports Controller Redundancy

Non-Interference Switching: Switching Process Input No Fluctuation, No Interruption 2. Complete Diagnosis and Monitoring

STI Self-Test: Supports online self-diagnosis of the system (channels, power supply, bus)

Status Indicators:

PWR (Power), RUN (Operation), FAULT (Fault)

REDUNDANT (Ready for Redundancy), CHx (Channel Status)

Fault Alarm: Open circuit, short circuit, over-limit, redundant failure with active alarm reporting

Online Calibration: Supports online accuracy calibration without downtime

3. Signal Processing and Compatibility

Standard Input: 4–20 mA compatible with all industrial transmitters (pressure, flow, temperature)

Long-distance Transmission: Supports signal transmission over 1km with low attenuation and strong anti-interference

System Compatibility: Fully compatible with TDC 3000 / TPS / UCN

Hardware Interchange: Can directly replace 51204174100 (non-CE redundant version)

4. Safety and Compliance

CE Certification: Meets EU equipment entry requirements, can be directly exported to Europe

RoHS: Environmentally friendly, lead-free, complies with EU environmental directives

Isolation Protection: High isolation voltage, protects the system and field devices from damage

V. Comparison of 51204174 Series Models Table

Model Version Retention CE/RoHS Precision Channels Applicable Scenarios

51204174-100 Standard Redundancy Version ✅ Dual Channels ❌ None ±0.075% FS 8 Channels Global non-EU critical acquisition

51204174-125 CE Redundancy Version ✅ Dual Channels ✅ CE/RoHS ±0.075% FS 8 Channels EU export, safety interlock, continuous acquisition

51204174-150 Basic Non-Redundancy ❌ None ❌ None ±0.1% FS 8 Channels Economic type conventional input

51204174-175 Enhanced Non-Redundancy ❌ None ❌ None ±0.075% FS 8 Channels Difficult working conditions high-precision input

V. Typical Applications

EU export projects: Chemicals, Oil and Gas, Power DCS analog signal acquisition

Safety interlock monitoring: Emergency stop, pressure / level / temperature safety monitoring

Continuous process acquisition: Temperature, pressure, flow, level closed-loop control

High-reliability section: Distillation tower, reactor, compressor status monitoring

Redundant control system: Compatible with redundant controller, redundant power supply

VI. Installation and Maintenance Tips

Installation: Standard 19" cabinet vertical installation, ensure ventilation

Wiring: Signal positive and negative poles distinction, shield layer single-ended grounding

Redundancy configuration: Main and backup channels one-to-one correspondence, redundancy enablement turned on

Calibration: Suggested precision calibration every 1–2 years

Fault: In redundant mode, faulty channels automatically switch, supports online replacement

VII. Product Status

Type: DCS system I/O input module (spare part)

Production status:停产 (legacy spare part)

Supply： Original inventory， refurbished， second-hand spare parts mainly

Replacement： Can be upgraded to the new Experion PKS C300 input module

VIII. Model Code Interpretation (51204174-125)

512： Honeywell DCS spare part prefix

04174： HLAI advanced analog input FTA series (different from 04172 output series)

-125： Dual-channel redundancy + CE/RoHS certification version identifier