ABB AO845A Product Introduction and Technical Specifications
Brand: ABB
Model: AO845A, part number 3BSE045584R1
Full Product Name: 8-channel HART Analog Output Module
Series: S800 I/O System
Country of Origin: Sweden
HS Code Reference: 85372090 (For customs reference only; confirm classification with local customs authority before declaration)
Overall dimension: 119 mm × 45 mm × 102 mm
Net weight: Approximately 0.23 kg

Electrical Specifications
Module supply voltage: 24 V DC nominal (18 V DC to 30 V DC operating range)
Standard output signal: 4–20 mA DC current signal
Maximum load resistance for current output: 750 ohms per channel
Output accuracy: ±0.1% of full scale
Power consumption: Max 3.5 W
Operating temperature range: 0 °C to +60 °C
Storage temperature range: -40 °C to +85 °C
Main Characteristics
Supports HART transparent transmission to enable parameter configuration and diagnostics of HART-compatible field devices;
Eight galvanically isolated independent output channels to reduce crosstalk interference;
Supports redundant module pairing for high-reliability process control occasions;
Cyclic self-diagnosis covering module hardware, channel wiring and output circuit anomalies;
Hot-swap capable for replacement without shutting down the whole I/O station;
LED status indicators for module power, operation and channel fault alarm;
Connects with controllers via ModuleBus or PROFIBUS DP communication;
Compliant with industrial electromagnetic compatibility standards;
Suitable for power plants, chemical, petrochemical, water treatment and other continuous process control applications.





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