ABB HIEE300890R0001 POS.A6092 Measurement Unit Board(MUB)

Description

Hardware & Electrical Specifications

• Model：UAC383AE01
• Part Number：HIEE300890R0001
• Cabinet position：POS.A6092
• Module Type：Measurement Unit Board (MUB)
• Signal Input：Multi‑channel high‑precision analog measurement inputs; multi‑channel binary status input
• On‑board processor：32‑bit RISC processor; Flash & RAM memory for data buffering and fault event storage
• Logic power supply：24 V DC (‑15% ~ +10%)
• Max power consumption：10.8 W
• Galvanic isolation：≥2500 V AC between field measurement side and internal logic side
• Dielectric strength：2500 V AC 1 minute
• Insulation resistance：＞100 MΩ @ 500 V DC
• On‑board protection：Transient surge clamping for analog input channels, EMC filter circuit, reverse‑polarity protection for 24 V power supply

Environmental Specifications

• Operating temperature：‑10 ℃ ~ +60 ℃
• Storage temperature：‑40 ℃ ~ +85 ℃
• Relative humidity：5%‑95% non‑condensing
• Protection degree：IP20 (installed inside excitation cabinet)
• EMC compliance：IEC 61000‑6‑2 industrial electromagnetic immunity standard
• Certifications：CE

Mechanical Data

• Installation：Euro‑card plug‑in board, fixed by front‑panel locking handles, connected via back‑plane gold‑finger connector, installation position POS.A6092 inside excitation cabinet
• Interfaces：Back‑plane gold‑finger connector, analog measurement screw terminals, binary‑signal terminal blocks
• Suitable wire cross‑section：0.75 mm²‑2.5 mm² copper cable for signal terminals
• Terminal tightening torque：0.6‑1.0 N·m
• Dimension：233 mm × 160 mm × 30 mm
• Weight：approx 0.65 kg

Main Functions

1. Multi‑channel high‑precision analog signal sampling & conditioning：Collect generator terminal voltage, excitation voltage, excitation current analog signals; filter high‑frequency interference inside power cabinet, convert analog quantity into digital data and upload to main CPU for AVR closed‑loop regulation and protection logic calculation.
2. Binary status signal acquisition：Collect cabinet breaker auxiliary contacts, excitation‑system interlock contact feedback signals.
3. Local data pre‑processing：Complete signal scaling, offset compensation and fault preliminary judgement on‑board, reduce computation load of main CPU board.
4. Comprehensive channel‑level self‑diagnosis：Detect analog‑channel over‑range, signal loss, hardware circuit abnormality, binary‑input signal failure. Fault code with channel number is uploaded to excitation controller, displayed on local HMI and remote DCS alarm system.
5. On‑board multi‑LED status indication
   • Green LED：Board 24 V auxiliary power supply normal, back‑plane bus communication ok
   • Yellow LED：Signal sampling running normally
   • Red LED：Sampling‑channel fault / board hardware failure
6. Fault event temporary storage：Locally cache partial fault snapshot data for post‑fault maintenance analysis.
7. Galvanic isolation function：Realize electrical isolation between field measurement circuit and internal control logic circuit, restrain ground‑loop interference and prevent surge damage penetrating into CPU unit.

Installation & Wiring Requirements

1. Insert board into cabinet slot of POS.A6092 position, lock front‑panel handles; ensure back‑plane gold‑finger connector fully engaged. Hot‑swap is strictly forbidden; cut off cabinet total power before disassembly and assembly.
2. Guarantee cabinet ventilation and heat dissipation; avoid conductive dust and corrosive gas accumulating on PCB surface.
3. Analog measurement signals must adopt shielded twisted‑pair cable; single‑end shield grounding inside excitation cabinet. Separate measuring signal wiring from high‑voltage pulse wiring and power busbar, run in different cable ducts to reduce interference coupling.
4. Cabinet protective grounding must strictly follow ABB UNITROL excitation‑system grounding specification, guarantee isolation performance and anti‑interference capability.
5. Verify 24 V DC logic power supply within allowable tolerance; over‑voltage will cause permanent hardware damage.
6. After board replacement, verify firmware compatibility with main CPU board; perform measurement‑channel offset and gain calibration according to project parameters.