Product Description:

B&R Automation manufactures the 3AO775.6 analog output module for the System 2005 Controllers series. Designed for DIN-rail assemblies inside a control cabinet, the module converts digital setpoints from the CPU into controlled current loops. By providing deterministic analog drive signals, it supports closed-loop regulation of actuators, variable-speed drives, and other field devices used in assembly cells, process skids, and packaging equipment. Because it integrates directly on the local I/O bus, wiring is reduced and update latency remains predictable.

Separate power pins feed the analog circuitry. The 24 V DC rail draws 4.5 W, while the isolated 5 V DC rail requires 1.0 W, which helps keep heat dissipation moderate on the backplane. Each conversion cycle completes in 250 µs, so the CPU can refresh all outputs at high speed for fast control loops. Signal granularity is 11-bit, which provides 2,048 discrete steps across the full current range, and the basic linearity error remains within ±0.5 % at 20 °C. The backplane provides isolation between the channels and the PLC, but the channels do not have isolation from one another. The housing carries an IP20 rating, indicating finger-safe terminals intended for installation in an enclosure that provides the necessary protection.

The board provides 8 current outputs, and each one sources 0 to 20 mA for standard industrial loop receivers. The output stages are short-circuit proof, so inadvertent wiring faults will not damage the device, and total consumption across both supply rails is 5.5 W. Continuous operation is allowed from 0 to 60 °C ambient with relative humidity from 5 to 95 percent, permitting installation in most climate-controlled panels. Storage temperatures can fall to -25 °C or rise to 70 °C without degrading calibration.