Technical Specifications Input Signal Type: 4‑20 mA standard analog current signal Channel Quantity: multi‑channel isolated analog input Galvanic Isolation: channel‑to‑bus galvanic isolation Backplane Bus: AC800M internal control bus Power Supply: supplied by DCS rack backplane Operating Temperature: 0 ℃ to +60 ℃ Mounting: plug‑in installation for standard DCS rack
Functional Features Multi‑channel acquisition for 4‑20 mA field transmitter analog signal. Galvanic isolation between field side and DCS system bus restrains interference. Signal over‑range detection and module hardware self‑diagnosis. Plug‑in modular structure supports hot‑swap operation under compatible rack.
Application Scenarios Process parameter signal collection for petrochemical DCS control cabinet. Temperature, pressure and flow analog input for power plant automation system. Field transmitter signal acquisition for water‑treatment process control system.
Performance Parameters Analog‑to‑digital conversion accuracy satisfies industrial process control requirement. Channel‑bus isolation suppresses ground loop interference introduced by field cable. Self‑diagnosis function detects channel open‑circuit and module hardware fault.
Material Composition Industrial multilayer printed circuit board. Analog‑digital conversion chip and isolation components. Gold‑plated backplane connector. Flame‑retardant plastic module housing.
Structural Features Standard DCS rack plug‑in module form factor. Front‑panel status LED indicators for channel and module status. Front‑side plug‑gable terminal block for field signal wiring. Back‑end gold‑plated connector connects with rack backplane bus.
Working Principle Field 4‑20 mA analog signal enters module via front‑side terminal block. Internal circuit completes signal conditioning and analog‑digital conversion. Digital measurement value transmits to DCS controller through rack backplane bus. Diagnosis circuit monitors channel and module hardware working status.
Installation Requirements Insert module into corresponding slot of AC800M DCS rack. Lock module mechanical buckle to guarantee backplane connector engagement. Connect field transmitter signal cable to front‑side plug‑in terminal block.
Usage Notes Confirm field signal type matches module input specification before wiring. Follow DCS system procedure when performing module hot‑swap. Check terminal wiring tightness during regular system maintenance.
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