Honeywell 51204172125 Product Detailed Description

Product Model: 51204172125 (Standard Number: 51204172-125)

Brand: Honeywell

Product Category: UCN Advanced Analog Output FTA Module (HLAO FTA, Redundant CE Certified Version)

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

I. Product Overview

51204172125 is a dual-channel redundant, CE-certified advanced analog output field termination module (High Level Analog Output Field Termination Assembly) in the 51204172 series of Honeywell UCN systems. It is designed for high-reliability scenarios such as EU export, safety interlock, and continuous control, providing 4–20 mA standard analog signal output, with complete redundancy, complete self-diagnosis, electrical isolation, CE/RoHS compliance, and is the core redundant output module in the 51204172 series for international markets.

II. Core Specification Parameters

1. Signal Specifications

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

Channel Count: 8 independent outputs (redundant architecture, dual-channel redundancy)

Accuracy: ±0.1% Full Scale (FS) @ 25°C

Resolution: 16-bit D/A Conversion

Drive Capacity: Maximum 600 Ω Load (standard 250 Ω)

Isolation: Channel - System Electrical Isolation (≥ 1500 V AC)

Common Mode Suppression Ratio: > 100 dB (50/60 Hz)

Response Time: < 120 ms

Output Protection: Short Circuit Protection, Overcurrent Protection, Reverse Connection Protection

2. Electrical Parameters

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 channels automatically seamless switching (Switching Time < 50 ms)

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

Bus Redundancy: Backplane Redundant Bus, Supports Controller Redundancy

Non-Interfering Switching: Switching Process Output No Fluctuation, No Interruption

2. Complete Diagnosis and Monitoring STI Self-Test: Supports online self-diagnosis of the system (channels, power supply, buses)

Status indicators:

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

REDUNDANT (Ready for redundancy), CHx (Channel status)

Fault alarms: Open circuit, short circuit, over-limit, active reporting of redundant failure

Online calibration: Supports online accuracy calibration, no need to stop the machine

3. Signal Processing and Compatibility

Standard output: 4–20 mA compatible with all industrial actuators (valves, frequency converters)

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 51204172100 (non-CE redundant version)

4. Safety and Compliance

CE Certification: Meets the requirements for EU equipment entry, 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 on-site equipment safety

IV. Comparison of 51204172 Series Models Table

Model Version Retention CE/RoHS Channels Applicable Scenarios

51204172-100 Standard Redundancy Version ✅ Dual Channels ❌ None 8 Channels Global Non-EU Critical Circuits

51204172-125 CE Redundancy Version ✅ Dual Channels ✅ CE/RoHS 8 Channels EU Export, Safety Interlock, Continuous Control

51204172-150 Basic Non-Redundancy Version ❌ None ❌ None 8 Channels Economic Type Regular Output

51204172-175 Enhanced Non-Redundancy Version ❌ None ❌ None 8 Channels Difficult Operating Conditions High Precision Output

V. Typical Applications

EU Export Projects: Chemicals, Oil and Gas, Power DCS Analog Output

Safety Interlock Control: Emergency Stop, Control Valve, Side-Stream Control

Continuous Process Control: Temperature, Pressure, Flow Closed-loop Regulation

Highly Reliable Section: Distillation Tower, Reactor, Compressor Control

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 Polarity Differentiation, Shield Layer Single-ended Grounding

Redundancy Configuration: Main and Standby Channels One-to-One Correspondence, Redundancy Enable Switched On

Calibration: Suggested Precision Calibration Every 1–2 Years

Fault: In Redundant Mode, Fault Channel Automatically Switches, Supports Online Replacement

VII. Product Status

Type: DCS System I/O Output Module (Spares)

Production Status:停产 (legacy spares)

Supply： Original Inventory， Refurbished， Second-hand Spares Predominantly

Replacement： Upgradeable to New Experion PKS C300 Output Module

VIII. Model Code Interpretation (51204172-125)

512： Honeywell DCS Spare Prefix

04172： HLAO Advanced Analog Output FTA Series (Different from 04170 Input Series)

-125： Dual Channel Redundancy + CE/RoHS Certification Version Identifier