Description
‑ Power Supply：Supplied by rack back‑plane 24 VDC；typical power consumption 7.6 W
‑ Mechanical Structure：standard Eurocard plug‑in board, front‑panel locking handle；weight approx 0.83 kg
‑ On‑board Resources：multi‑channel analog input conditioning circuit, analog output driving circuit, signal filtering components, back‑plane bus interface, module self‑diagnosis circuit, conformal‑coating protection
‑ Communication Interface：internal back‑plane bus for data interaction with excitation main‑processor；external analog signal terminal interfaces
‑ Galvanic Isolation：galvanic isolation between field analog‑signal side and excitation internal logic side, isolation rating 2500 VAC
‑ Core Function：excitation system external analog‑signal acquisition, analog set‑point receiving, analog status‑value output to external equipment
‑ Protection：signal‑channel surge‑suppression, over‑voltage input protection
‑ Status LED Indicators：Power indicator, Module Fault indicator, channel status LED
‑ Weight：approx 0.83 kg
‑ Receives external analog given signals from DCS or local control device (4‑20mA, ±10V), after filtering and isolation conversion, transmits set‑point value to O3EEb main‑processor for AVR regulation calculation.
‑ Converts excitation internal real‑time operating data (generator terminal voltage, excitation current, reactive power etc.) into standard analog output signals, sends to external meter, recorder and remote monitoring equipment.
‑ Module self‑diagnosis monitors back‑plane power‑supply and each analog‑channel status; detects signal loss and hardware fault, reports fault word to excitation main‑processor. Conformal‑coating circuit board improves anti‑humidity and anti‑dust performance in cabinet environment.
‑ Cannot run independently; must cooperate with UNITROL excitation rack and O3EEb main‑processor module. P3EA HENF315216R1 is dedicated excitation analog I/O board, cannot be substituted by general‑purpose DCS analog modules.
‑ Continuously monitors power‑supply and analog‑channel working state. Fault will activate fault LED and report alarm signal to main‑processor.
‑ No local historical‑data storage; channel status and fault information are read through excitation commissioning tool.
‑ Module hardware failure will result in loss of external analog given‑input and analog status‑output channels; excitation internal AVR control logic still runs normally, but remote analog set‑point and analog‑meter display function fail.
‑ Back‑plane connector: inserts into UNITROL rack slot, realizes data exchange with excitation main‑processor.
‑ External screw terminals: connect to DCS analog output, local set‑point device, field analog meter and recording‑equipment cables.
‑ Mounting：insert into UNITROL excitation cabinet standard Eurocard rack slot
‑ Operating Temperature：‑10 ℃ ~ +60 ℃
‑ Storage Temperature：‑40 ℃ ~ +70 ℃
‑ Relative Humidity：5‑95 %RH, non‑condensing
‑ Protection Class：IP20, cabinet‑internal installation.
- P3EA excitation analog input‑output interface module（HENF315216R1）
Complementary parts: UNITROL‑series excitation cabinet rack, O3EEb main‑processor module, external analog signal cables, excitation commissioning tool.
‑ Cut off excitation cabinet auxiliary power before inserting or replacing this module. Distinguish analog input and output wiring, prevent over‑voltage signal from damaging board channel.
‑ For spare‑part replacement: verify full model P3EA and part‑number HENF315216R1; after installation check back‑plane power‑supply, verify analog‑input set‑point response and analog‑output signal accuracy. Hardware‑version mismatch will lead to analog‑signal conversion abnormality risk.
‑ Module fault will result in excitation‑system external analog‑given input and analog‑status‑output channel failure.
Thermal‑power and hydro‑power generator static excitation cabinets; ABB UNITROL‑series old excitation‑system maintenance and spare‑part replacement; industrial spare‑part for excitation‑system external analog‑signal interface unit.
- UNITROL excitation dedicated P3EA analog I/O interface module (HENF315216R1), completes external analog set‑point signal acquisition and excitation operating‑parameter analog output function.
- Galvanic‑isolation design for each analog channel, suppresses external circuit interference and protects excitation internal control hardware.
- Conformal‑coating circuit board, adapts to humid and dusty cabinet‑installation environment.
- Standard Eurocard plug‑in structure, convenient cabinet installation and spare‑part swapping.
- Legacy discontinued excitation spare‑part, only applied for old‑generating‑unit maintenance and retrofit projects.
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