X20SO4120 B & R Automation
Wake Industrial LLC is not an authorized distributor of this product.
The X20SO4120 is a Safe Digital Output Module produced by B & R Automation and is part of the X20 Fieldbus Input Output Modules series. It features 4 output channels with a nominal voltage of 24 VDC and supports a maximum output power of 120 W. The module offers current monitoring and a maximum output current of 2 Amps.
Internal Product Review
The X20SO4120 is a B & R Automation safe digital output module with 4 channels and a 24 VDC nominal voltage. Current monitoring supports dependable machine safety integration, and the 2 A output current gives the module solid switching capability. A 500 µs maximum OSSD time stands out as a strong specification for responsive safety control.
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Product Description:
The X20SO4120 is a safe digital output module produced by B&R Automation for the X20 Fieldbus I/O Modules series. It fits onto the system backplane and provides safety-related switching for external actuators in machinery with SIL requirements. The module drives 24 V DC devices such as contactors, lamps, and interposing relays while exchanging diagnostic information over the X20 bus. It adds outputs that the safety controller can shut down without disrupting standard I/O traffic. Its mechanical format matches other X20 modules, allowing it to fit consistently within the fieldbus station and control cabinet.
The module provides four channels, with each channel isolated to support a separate load circuit. It uses a nominal supply of 24 V DC, so connected loads must operate at the same voltage level for reliable switching. The outputs conform to the Safe Type A classification, and each channel is continuously monitored for short circuits and cross faults. A maximum de-energization delay of 500 µs allows the module to remove output power in less than one millisecond when a stop command occurs. Each channel can source up to 2 A, enabling direct control of compatible solenoids, pilot valves, and similar actuators without additional amplifiers.
The logic section draws 0.25 W from the backplane, which limits the power used by the module’s control electronics. During operation, the output stage consumes 1.30 W of internal I/O power. The module can deliver up to 120 W of combined load power across all four outputs when the connected loads use the available capacity. Integrated current monitoring reports overcurrent and wire-break conditions to the safety CPU, making electrical faults easier to identify. These diagnostic reports help the controller distinguish between an interrupted load circuit and excessive current demand. The specified power consumption also helps limit heat generation inside the enclosure during continuous operation.
