Technical Specifications Multi‑channel analog output, supports 4‑20 mA current signal. Back‑plane system bus interface. Auxiliary power 24 V DC, typical power consumption 4.4 W. Operating temperature 0 ℃ to +60 ℃, storage temperature ‑40 ℃ to +85 ℃, non‑condensing relative humidity 5%‑95%. Galvanic isolation between field channels and internal bus.
Functional Features Receives digital control setpoint values from DCS controller via back‑plane bus. Completes digital‑to‑analog conversion and outputs standard analog current signals to field equipment. Front‑panel LED indicates channel output and module fault status. Built‑in hardware self‑diagnosis detects field output loop load and circuit faults.
Application Scenarios DCS analog output spare part for process industry. Applied in power plant, petrochemical and chemical plant regulating control loop maintenance.
Performance Parameters High‑precision digital‑to‑analog conversion performance. Stable analog signal output capability. Effective galvanic isolation restrains industrial site interference.
Material Composition Flame‑retardant plastic module housing. Multilayer glass‑fiber epoxy printed circuit board. Digital‑to‑analog conversion and signal driving assemblies. Back‑plane plug‑in connector and field wiring terminals.
Structural Characteristics Standard S800 rack plug‑in module. Front side equipped with field output wiring terminals and status LED indicators. Rear side fitted with back‑plane bus connector. Weight approximately 0.42 kilogram.
Working Principle Digital control values from DCS controller are received through back‑plane bus. Internal digital‑to‑analog conversion circuit generates analog output signals. Analog signals are transmitted to field actuators via front‑end terminals. Diagnosis circuit continuously monitors each output loop operating condition.
Installation Requirements Insert AO845 into corresponding rack slot and lock fixing latch. Complete field actuator wiring on front‑end terminals. Restore power supply, perform channel output calibration and verify actuator regulation action.
Usage Notes Match field actuator load parameter with module specification. Use shielded twisted‑pair cables for analog output wiring. Separate signal cables from high‑voltage power cables. Hot‑plug under powered state is forbidden.
There are no reviews yet.