Description
Hardware & Electrical Specifications
- Model：UCD224A103
- Part Number：3BHE023681R0103
- Module Type：High‑Reliability 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 1.28 kg
- Dimension：Standard Euro‑card form‑factor for UNITROL6000 rack
Main Functions
- Excitation sequence‑logic execution: Receives logic commands from main processor, implements generator excitation startup, shutdown, field‑breaker switching and auxiliary‑equipment linkage sequence.
- Relay‑contact binary‑output driving: Provides dry‑contact relay outputs for excitation breaker control, system trip output, fault‑alarm indication and external interlock‑signal output.
- Field binary‑status acquisition: Collects cabinet auxiliary dry‑contact signals, converts field contact status into digital logic for interlock‑protection condition judgment.
- Redundant‑oriented interlock‑condition monitoring: Monitors multiple critical interlock‑signal status, triggers excitation‑blocking logic under abnormal‑condition, uploads interlock‑event codes to main processor, adapts to dual‑channel redundant cabinet configuration.
- Channel‑level fault diagnosis: Detects binary‑input signal loss, relay‑output abnormal and channel fault status, reports detailed fault codes to UNITROL6000 system.
- Board‑level comprehensive self‑diagnosis: Monitors on‑board power‑supply and hardware‑logic running status; uploads hardware‑fault‑alarm information to main processor.
- 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
- Cut off cabinet total power before disassembly and assembly. Insert UCD224A103 into designated rack slot and fasten fixing screws firmly. Hot‑swap is strictly forbidden.
- 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.
- Cabinet protective grounding must comply with ABB AC800‑PEC / UNITROL6000 system grounding specification.
- 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.
- Replacement note: Cannot run independently; must match corresponding main‑processor hardware and full‑system firmware version.
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