Technical Specifications 8‑channel digital input, input signal type 24 V DC. Back‑plane system bus interface. Auxiliary power supplied from rack back‑plane, typical power consumption 2.6 W. Operating temperature 0 ℃ to +60 ℃, storage temperature ‑40 ℃ to +85 ℃, non‑condensing relative humidity 5%‑95%. Channel‑to‑bus galvanic isolation.
Functional Features Acquires on‑off status of field digital contact signals. Completes signal isolation and level conversion. Transmits channel status data to controller via back‑plane bus. Front‑panel LED indicates real‑time on‑off status of each input channel. Built‑in hardware self‑diagnosis detects internal circuit failure.
Application Scenarios Legacy digital input spare part for ABB early DCS and PLC control rack. Used for maintenance and renovation of old‑site automation control cabinets.
Performance Parameters Reliable digital signal level conversion. Independent channel status indication. Stable back‑plane bus data transmission.
Material Composition Flame‑retardant plastic module housing. Multilayer glass‑fiber epoxy printed circuit board. Signal isolation and level conversion assemblies. Back‑plane plug‑in connector and field signal terminals.
Structural Characteristics Standard rack plug‑in module. Front side equipped with field signal terminals and channel status LED indicators. Rear side fitted with back‑plane bus connector. Weight approximately 0.30 kg.
Working Principle Field 24 V DC digital signals access each channel terminal. Internal isolation circuit completes signal level conversion. Channel on‑off status is encoded into bus data and uploaded to controller. Diagnosis circuit monitors module internal hardware operating condition continuously.
Installation Requirements Disconnect rack auxiliary power before replacement. Insert D0801 into target rack slot and lock fixing latch. Connect field digital signal wiring to front‑end terminals. Confirm back‑plane connector is fully engaged. Restore power supply, verify input status response of each channel.
Usage Notes Keep field signal wiring polarity correct. Prevent over‑voltage signal from accessing input channels. Hot‑plug operation under powered condition is prohibited. Check every channel input function after module replacement.
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