Product Description:

The X20AO2622 analog output module is produced by B&R Automation and belongs to the X20 Fieldbus Input Output Modules series. Designed for industrial automation systems, the unit converts digital setpoints from the fieldbus into regulated voltage or current levels that drive control valves, speed references, proportional devices, or other analog actuators. It provides dual-channel operation in a compact slice format, allowing integration into distributed I/O stations where precise analog control is needed without dedicated power conditioning.

It has 2 analog outputs, and each is isolated from the backplane by 500 Veff, which helps protect upstream controllers from transient potentials. The module draws only 0.01 W from the X20 bus, so its heat contribution in a densely packed slice remains low. A digital-to-analog conversion cycle completes in 200 µs, and the current path has 12-bit resolution, producing 4096 discrete steps across the 0 to 20 mA range with 4.883 µA per LSB under INT 0x0000–0x7FFF coding. In voltage mode, the module uses the INT 0x8001–0x7FFF scheme with 2.441 mV per step, which allows consistent scaling for voltage-driven devices. During conversion, nonlinearity stays below 0.007%, while gain and offset errors remain limited to ±0.15% and ±0.05%. The slice requires 1.1 W of internal I/O power supplied through the system rail.

After each command, the outputs settle to their final value within 1 ms, which supports fast closed-loop response when paired with the module’s 10 kHz analog filter. The output stages tolerate accidental shorts up to ±40 mA, helping the module withstand brief wiring faults or load disturbances. Stable voltage operation is maintained when the connected load is 1 kΩ or higher. The filter suppresses switching artifacts, and the low nonlinearity with fine step resolution supports accurate actuator positioning across varied process conditions and cable lengths.