Product Overview

The ABB UCD224A102 is a high-precision,dual-channel universal analog input module designed for the ABB MasterView™and Advant Controller 400/500 series—legacy yet widely deployed distributed control systems(DCS)in power generation,oil&gas,and heavy industrial facilities.As part of ABB’s UCD(Universal Channel Device)I/O family,the ABB UCD224A102 provides flexible signal conditioning for a broad range of field transmitters,supporting both current(4–20 mA)and voltage(0–10 V,±10 V)inputs with galvanic isolation,high common-mode rejection,and built-in diagnostics.Its dual-channel architecture maximizes I/O density while minimizing chassis slot usage,making it ideal for cost-sensitive expansions or retrofits where panel space is limited.

Engineered for reliability in electrically noisy environments,the ABB UCD224A102 features robust surge protection,thermal stability,and compliance with international standards such as IEC 61000-4 for electromagnetic compatibility.Each channel operates independently,allowing mixed signal types within the same module—a significant advantage in complex process loops involving temperature,pressure,and flow measurements.With its seamless integration into ABB’s System 800xA and legacy Advant engineering tools,the ABB UCD224A102 ensures accurate data acquisition,long-term calibration stability,and simplified maintenance across mission-critical automation infrastructures.

Technical Specifications

Parameter Name Parameter Value

Product Model UCD224A102

Manufacturer ABB

Product Type Dual-Channel Universal Analog Input Module

Compatible Systems ABB Advant Controller 400/500,MasterView DCS

Number of Channels 2(independent,configurable)

Input Signal Types 4–20 mA,0–20 mA,0–10 V,±10 V

Input Impedance>250 kΩ(voltage),250Ω(current)

Resolution 16-bit

Accuracy±0.05%of full scale at 25°C

Galvanic Isolation 500 V DC between channels and backplane

Update Time≤100 ms per channel

Operating Temperature 0°C to+60°C

Power Consumption 2.8 W typical

Mounting DIN rail or system-specific I/O chassis

Main Features and Advantages

Universal Input Flexibility:The ABB UCD224A102 eliminates the need for multiple dedicated input modules by allowing each of its two channels to be individually configured via software for any supported analog signal type.This adaptability simplifies spares management and enables rapid reconfiguration during plant modifications—without rewiring or hardware replacement.

Exceptional Signal Integrity:With 16-bit resolution and±0.05%accuracy,the ABB UCD224A102 captures subtle process variations critical for combustion optimization,turbine control,or emissions monitoring.High common-mode rejection ratio(>120 dB)and differential input design ensure immunity to ground loops and electrical noise prevalent near motors,VFDs,or switchgear.

Advanced Diagnostics and Reliability:The ABB UCD224A102 continuously monitors for open circuits,sensor failures,and out-of-range conditions,reporting faults directly to the controller for operator alerts or automated responses.Its conformal-coated PCB and wide operating temperature range support deployment in harsh environments—from offshore platforms to boiler rooms—while maintaining decades-long service life in nuclear and fossil power applications.

Application Field

The ABB UCD224A102 is extensively used in thermal and nuclear power plants for monitoring critical parameters such as steam pressure,feedwater flow,and generator bearing temperature—where signal fidelity directly impacts safety and efficiency.In oil refineries and petrochemical complexes,it interfaces with smart transmitters in distillation columns,reactor vessels,and flare systems,leveraging its noise immunity in high-EMI zones.Combined-cycle plants utilize the ABB UCD224A102 in HRSG(Heat Recovery Steam Generator)control loops,where mixed current and voltage signals from diverse sensors converge on a single I/O card.

Municipal utilities deploy the module in SCADA RTUs for reservoir level and pump status monitoring,benefiting from its low drift over time.Industrial boiler houses use it for oxygen trim control,integrating zirconia probe voltage signals alongside 4–20 mA fuel valve feedback.Even in modernized legacy DCS upgrades,engineers select the ABB UCD224A102 for its proven interoperability with System 800xA asset management tools.Across these sectors,the ABB UCD224A102 delivers trusted,high-fidelity analog input performance that supports regulatory compliance and operational excellence.

Related Products

UCD224A101:Single-channel version of the same universal input module.

UCD228A102:Quad-channel variant with lower per-channel feature set but higher density.

UCD324A102:Analog output counterpart,providing 4–20 mA or 0–10 V drive capability.

AC800M CI854:Modern PROFIBUS/Modbus serial interface often used alongside UCD modules in hybrid systems.

TK807V001:Terminal block adapter kit specific to UCD224-series modules.

PM864:AC 800M CPU commonly integrated in upgraded systems retaining legacy UCD I/O.

AI810:Newer 8-channel analog input module for AC 800M,used in greenfield replacements.

Installation and Maintenance

Pre-installation preparation:Before installing the ABB UCD224A102,verify compatibility with the target I/O base(e.g.,TB820 or equivalent terminal block assembly)and confirm that the controller firmware supports the UCD224A102 module type.Configure each channel’s input type using ABB’s Composer or Advant Engineering Toolset prior to download—this setting determines internal jumper emulation and scaling parameters.Use shielded,twisted-pair cables for all field connections,grounding shields at the cabinet end only to avoid ground loops.

Maintenance recommendations:The ABB UCD224A102 requires no routine calibration but should undergo periodic loop checks using a precision calibrator to validate end-to-end signal accuracy.Monitor diagnostic flags in the control system for open-wire or saturation alarms,which often indicate failing field devices rather than module faults.If replacement is needed,ensure the new ABB UCD224A102 matches the exact revision code(A102 suffix denotes specific firmware/hardware variant).Store spare units in dry,static-safe containers at ambient temperatures to preserve long-term reliability.

Product Guarantee

Every ABB UCD224A102 we supply is either new-in-box from original ABB inventory or fully refurbished to OEM specifications,including functional validation of both channels across all signal types,isolation testing,and communication handshake verification.Each unit is accompanied by a detailed test report and comes with a 12-month warranty against defects in materials and workmanship.Backed by expert ABB-certified technical support,our guarantee ensures your ABB UCD224A102 delivers dependable,high-accuracy analog input performance in even the most demanding industrial control applications—because in process automation,precision isn’t optional,it’s essential.

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