Product Description:

The X20DO2623 alternating-current digital output module is produced by B&R Automation for the X20 Fieldbus Input Output Modules series. It provides two solid-state relay channels so a controller can energize or de-energize external actuators on 80–264 VAC mains without mechanical contacts. Within an automation node, the module occupies a single X20 slot and communicates through the system backplane, supplying deterministic on/off commands for motors, valves, or indicator circuits in distributed control architectures.

Each channel is implemented with an SSR output type and follows an L-switching circuit topology. The design supports a minimum output voltage of 80 VAC and a maximum output voltage of 264 VAC, allowing operation on 120 V or 230 V networks. Nominal load current per channel is 1 A, while the internal on-state drop is limited to 1.5 V, keeping dissipation low. Switch devices are synchronized to the mains waveform by zero-crossing detection, and full-wave control with an integrated snubber network helps suppress voltage transients. The housing carries an IP20 rating and is keyed for 240 V to prevent misplacement. Field wiring uses a 3-wire connection that brings the switched line, neutral, and protective earth directly to the terminal.

The module’s logic section draws only 0.35 W from the backplane and needs an additional 0.38 W from the external I/O supply, so cabinet thermal load is minor. Galvanic separation between field and logic domains is verified for up to 2500 VAC insulation voltage, maintaining controller integrity when switching inductive or capacitive loads. The module has 2 individually isolated outputs that benefit from the integrated snubber, full-wave control, and zero-crossing switching to reduce electromagnetic emission and inrush stress. The L-switching arrangement directs current toward the load, and the 240 V keying helps prevent accidental insertion into mismatched voltage segments during installation.