Technical Specifications Multi‑channel isolated digital input and relay drive output. Auxiliary power supplied by system rack, typical power consumption 6.4 W. Operating temperature ‑10 ℃ to +55 ℃, storage temperature ‑40 ℃ to +85 ℃, non‑condensing relative humidity 5%‑95%. Conformal coated surface, isolation voltage 2000 V AC between field loop and internal logic circuit.
Functional Features Conditions and isolates external status signals transmitted to main control unit. Drives relay output for external device control commands. On‑board LED reflects each channel input‑output status. Built‑in hardware circuit self‑diagnosis function. Conformal coating improves environmental adaptability.
Application Scenarios Internal spare‑part component for excitation system and large‑scale drive equipment. Used for equipment overhaul and spare‑part replacement in power plant and heavy‑industry site.
Performance Parameters Signal response satisfies millisecond‑level control timing requirement. Isolation circuit restrains secondary‑loop electromagnetic interference. Diagnosis function captures board‑level circuit fault rapidly.
Material Composition Multilayer glass‑fiber epoxy printed circuit board. Signal conditioning chip, optocoupler isolation and relay drive components. Conformal protective coating layer. Multi‑pin plug‑in connectors. Screw‑type signal terminals.
Structural Characteristics Flat plug‑in circuit board matched with cabinet internal slot. Board edge equipped with plug‑in connectors and wiring terminals. Mechanical fixing holes. Weight approximately 0.64 kilogram.
Working Principle Control command from main control unit passes through back‑plane connector to this interface board. Signals go through isolation and drive circuit, then output relay control signal to external secondary loop.
Installation Requirements Cut off system rack auxiliary power before replacement. Insert interface board into designated slot and fasten fixing screws. Ensure connectors are fully inserted and locked. Restore power‑supply, check on‑board LED status and complete whole‑equipment function test.
Usage Notes Use anti‑static wrist strap during disassembly‑assembly. Avoid scratching conformal coating surface. Confirm main‑frame power is fully cut off before operation. Inspect connector contact condition during equipment overhaul.
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