Technical Specifications Expanded multi‑channel isolated digital input and relay drive output. Auxiliary power supplied by system rack, typical power consumption 7.0 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.
Functional Features Supports multi‑channel external status signal collection and isolation. Multi‑group relay drive output for field device control. On‑board LED indicators display each channel status. Hardware self‑diagnosis detects on‑board circuit fault. Conformal coating improves environmental adaptability for industrial cabinet.
Application Scenarios Applied for excitation system and large‑capacity drive equipment requiring more I/O channels. Used as spare‑part for equipment overhaul and replacement in power plant and heavy‑industry site.
Performance Parameters All channels maintain stable signal transmission performance. Galvanic isolation restrains external electromagnetic interference. Self‑diagnosis function rapidly locates board‑level hardware abnormality.
Material Composition Multilayer glass‑fiber epoxy printed circuit board. Multi‑group signal conditioning and optocoupler isolation components, relay drive units. Conformal protective coating. Multi‑pin back‑plane plug‑in connectors. Screw‑type signal terminals.
Structural Characteristics Standard plug‑in circuit board for cabinet slot installation. Board edge equipped with back‑plane connector and multi‑channel signal terminals. Mechanical fixing holes for fastening. Weight approximately 0.69 kilogram.
Working Principle Control instructions from main control unit are transmitted through back‑plane connector. After isolation and drive processing, relay outputs control signals to multiple field secondary loops. External device status signals access terminals, pass conditioning‑isolation circuit and feed back to main control unit.
Installation Requirements Fully cut off rack auxiliary power before replacement. Insert board into designated slot and tighten fixing screws. Confirm connectors are fully engaged and locked. Restore power‑supply, check LED channel status and complete whole‑system function test.
Usage Notes Adopt anti‑static protection during disassembly‑assembly. Avoid scratching conformal coating. Hot‑plug is strictly prohibited. Inspect terminal tightening and connector contact condition during equipment maintenance.
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