ABB UCD224A102 3BHE023681R0102 Enhanced Binary Logic & Sequence Control Board

Description

Hardware & Electrical Specifications

• Model：UCD224A102
• Part Number：3BHE023681R0102
• Module Type：Enhanced Binary Logic & Sequence Control Board
• Bus Interface：Internal high‑speed back‑plane connector for data exchange with main processor
• Binary Input：Multi‑channel galvanic‑isolated dry‑contact binary input channels
• Binary Output：Multi‑channel on‑board relay‑contact binary output channels
• Power supply：24 V DC cabinet internal power supply
• Max power consumption：14 W
• Galvanic isolation：≥2500 V AC between field‑signal side and control‑logic side
• Dielectric strength：2500 V AC 1 minute
• Insulation resistance：＞100 MΩ @ 500 V DC
• On‑board protection：ESD protection, surge suppression for relay contacts, contact‑feedback monitoring circuit, conformal coated PCB
• Compatibility note：Must match UNITROL6000 full‑system firmware version; cannot operate standalone, must cooperate with PPC‑series main‑processor hardware.

Environmental Specifications

• Operating temperature：‑10 ℃ ~ +60 ℃
• Storage temperature：‑40 ℃ ~ +85 ℃
• Relative humidity：5%‑95% non‑condensing
• Protection degree：Installed inside excitation cabinet rack
• EMC compliance：IEC 61000‑6‑2 industrial electromagnetic immunity standard
• Certifications：CE

Mechanical Data

• Installation：Plug‑in rack‑mount board, inserted into designated slot of UNITROL6000 cabinet
• Interfaces：Internal back‑plane connector; external terminal blocks for binary‑input and relay‑output field wiring
• Suitable wire cross‑section：0.75 mm²‑2.5 mm² copper cable for signal terminals
• Terminal tightening torque：0.6‑1.0 N·m
• Weight：approx 1.26 kg
• Dimension：Standard Euro‑card form‑factor for UNITROL6000 rack

Main Functions

1. Excitation sequence‑logic execution: Receives logic commands from main processor, implements generator excitation startup, shutdown, field‑breaker switching and auxiliary‑equipment linkage sequence.
2. Relay‑contact binary‑output driving: On‑board relay dry‑contact outputs for excitation breaker control, system trip output, fault alarm indication and external interlock signal output.
3. Field binary‑status acquisition: Collects cabinet auxiliary dry‑contact signals, converts field contact status to digital logic for interlock‑protection condition judgment.
4. Multi‑source interlock‑condition monitoring: Monitors multiple critical interlock‑signal status, triggers excitation blocking logic under abnormal condition, uploads interlock event codes to main processor.
5. Channel‑level fault diagnosis: Detects binary‑input signal loss, relay‑output abnormal and channel fault, reports detailed fault codes to UNITROL6000 system.
6. Board‑level comprehensive self‑diagnosis: Monitors on‑board power‑supply and hardware‑logic running status; uploads hardware‑fault alarm information to main processor.
7. On‑board multi‑LED status indication
   • Green LED：Board power supply normal, board logic running healthy
   • Yellow LED：Binary‑input / output channel signal active
   • Red LED：Interlock‑fault / relay‑channel fault / board hardware fault alarm

Installation & Wiring Requirements

1. Cut off cabinet total power before disassembly and assembly. Insert UCD224A102 into designated rack slot and fasten fixing screws firmly. Hot‑swap is strictly forbidden.
2. Connect field binary‑input cables and relay‑output control cables to corresponding terminal blocks; strictly follow excitation cabinet wiring specification; separate high‑power cables and weak‑signal cables to reduce electromagnetic interference.
3. Cabinet protective grounding must comply with ABB AC800‑PEC / UNITROL6000 system grounding specification.
4. After replacement, verify full‑system firmware compatibility with main processor board; download matching project parameters; perform binary‑input acquisition test and relay‑output function test before unit commissioning.
5. Replacement note: Cannot run independently; must match corresponding main‑processor hardware and full‑system firmware version.