ABB MPRC086444-005 Measurement‑Processing & Fiber‑Communication Board

Description

Hardware & Electrical Specifications

• Model：MPRC086444‑005
• Part Number：MPRC086444‑005
• Module Type：Measurement‑Processing & Fiber‑Communication Board
• Analog Input：Multi‑channel differential isolated analog inputs for voltage / current measurement
• ADC Resolution：14‑bit high‑precision analog‑to‑digital conversion
• Sampling Rate：High‑speed synchronous sampling for power frequency cycle
• Optical Interface：Dual LC fiber‑optic ports for high‑speed data transmission
• On‑board memory：RAM & Flash for data buffering and fault snapshot storage
• Logic power supply：24 V DC (‑15% ~ +10%)
• Max power consumption：12 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, conformal coating for PCB surface

Environmental Specifications

• Operating temperature：‑10 ℃ ~ +60 ℃
• Storage temperature：‑40 ℃ ~ +85 ℃
• Relative humidity：5%‑95% non‑condensing
• Protection degree：IP20 (installed inside excitation / MV drive 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
• Interfaces：Back‑plane gold‑finger connector, LC fiber‑optic interfaces, analog measurement screw 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：420 mm ×160 mm ×30 mm
• Weight：approx 1.16 kg

Main Functions

1. Multi‑channel high‑speed synchronous analog sampling：Collect generator terminal voltage, excitation voltage, excitation current and other key analog signals; perform hardware filtering to suppress high‑frequency interference inside power cabinet. Convert analog signals into digital sampling data for main controller closed‑loop regulation and protection calculation。
2. On‑board signal pre‑processing：Complete signal scaling, offset compensation and amplitude calculation on‑board, reduce real‑time computation burden of main CPU board.
3. High‑speed fiber‑optic data transmission：Transmit processed sampling data to main control board via optical fiber; optical transmission effectively eliminates strong electromagnetic interference in high‑power cabinet environment.
4. Comprehensive channel‑level self‑diagnosis：Detect analog channel over‑range, signal loss, sampling circuit abnormality, fiber‑link break fault. Upload fault code containing channel number to excitation controller, displayed on local HMI and remote DCS alarm system.
5. Fault‑snapshot local cache：Temporarily store partial fault waveform snapshot data on‑board for post‑fault maintenance analysis.
6. On‑board multi‑LED status indication
   • Green LED：Board 24 V auxiliary power supply normal, back‑plane bus link ok
   • Yellow LED：Fiber‑optic data transmitting / receiving active, sampling running normally
   • Red LED：Sampling‑channel fault / fiber link failure / board hardware error
7. Galvanic isolation function：Realize electrical isolation between field measurement circuit and internal control logic circuit, restrain ground‑loop interference and prevent surge from penetrating into main controller hardware.

Installation & Wiring Requirements

1. Insert board into standard Euro‑card cabinet slot, 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. Ensure 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 cabinet. Separate measuring‑signal wiring from high‑voltage pulse wiring and power busbar, route in different cable ducts to reduce interference coupling.
4. Optical fiber laying must avoid sharp bending; minimum bending radius ≥30 mm; keep fiber cables away from high‑power copper busbars.
5. Cabinet protective grounding must strictly follow system grounding specification to guarantee isolation performance and anti‑interference capability.
6. Verify 24 V DC logic power supply within allowable tolerance; over‑voltage will cause permanent hardware damage.
7. After board replacement, verify firmware compatibility with main CPU board; perform measurement‑channel offset and gain calibration according to project parameters.