ABB UCD208A101 3BHE020018R0101 Sequence Control & Binary Logic Board

Description

Hardware & Electrical Specifications

• Model：UCD208A101
• Part Number：3BHE020018R0101
• Module Type：Sequence Control & Binary Logic Board
• Bus Interface：Internal high‑speed back‑plane connector for data exchange with main processor
• Binary Input：Multi‑channel isolated dry‑contact binary input channels
• Binary Output：Multi‑channel on‑board relay contact output channels
• Power supply：24 V DC cabinet internal power supply
• Max power consumption：13 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‑fault monitoring circuit, conformal coated PCB
• Compatibility note：Must match UNITROL6000 full‑system firmware; 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 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 1.22 kg
• Dimension：Standard Euro‑card form‑factor for UNITROL6000 rack

Main Functions

1. Excitation sequence logic processing: Receives logic commands from main processor, executes generator excitation start‑up, shutdown sequence and auxiliary‑equipment linkage logic.
2. Relay‑type binary output driving: On‑board relay contact outputs for excitation breaker control, system alarm indication, external interlock signal output.
3. Binary dry‑contact signal acquisition: Collects cabinet auxiliary contact status, converts field contact signals into digital logic for interlock‑protection condition judgment.
4. Interlock‑condition monitoring: Monitors critical interlock‑signal status, triggers blocking logic when abnormal‑condition detected, reports interlock‑event codes to main processor.
5. Relay‑channel fault diagnosis: Detects relay‑output abnormal, input‑signal loss and channel fault status, uploads detailed fault information to UNITROL6000 system.
6. Board‑level comprehensive self‑diagnosis: Monitors on‑board power supply and hardware‑logic running status; reports hardware‑fault alarm 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 UCD208A101 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.