Technical Specifications Multi‑channel isolated binary input. Rated input voltage 24‑250 V DC. Input loop adopts optocoupler isolation. Auxiliary power supply 24‑250 V DC. Typical power consumption 3.9 W. Operating temperature ‑25 ℃ to +70 ℃, storage temperature ‑40 ℃ to +85 ℃, non‑condensing relative humidity 5%‑95%. Front‑panel IP30, rear connector area IP20. Complies with CE and IEC secondary equipment standards.
Functional Features Collects multi‑group external equipment status and fault binary signals. Realizes electrical isolation between field loop and internal logic circuit. Front‑panel LED indicators display each channel input status. Built‑in power‑supply monitoring function. Transmits collected status signal to rack internal back‑plane bus.
Application Scenarios Mounted in substation protection relay rack. Used for multi‑point status signal collection of traditional protection system. Suitable for old substation reconstruction and spare‑part replacement projects.
Performance Parameters Signal sampling response at millisecond‑level. Isolation performance satisfies secondary circuit anti‑interference requirement. Each channel LED status indication is accurate. Power‑supply fault gives prompt indication.
Installation Requirements Insert module into standard relay rack slot and lock fastening screw. Connect auxiliary power supply within rated voltage range. Complete external binary input wiring according to engineering schematic drawing. Guarantee reliable rack protective grounding. Check each channel LED indication after power‑on.
Usage Notes Take anti‑static protection before contacting module internal components. Hot‑plug operation under powered state is forbidden. Periodically check terminal tightening torque. Prevent dust and corrosive gas erosion. Verify signal collection function in equipment maintenance cycle.
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