Product Description:

The X20BM13 is a bus module manufactured by B&R Automation and belongs to the X20 Fieldbus Input Output Modules series. It couples the fieldbus segment to the local backplane so distributed I/O can exchange data with a central PLC or motion controller. The module also forms the physical starting point of the station, giving neighboring slices a stable interface for shared data and power transfer. Within an automation cabinet, it serves as the electrical and mechanical anchor point on the DIN rail for additional signal and power terminals.

The housing has a single-width design, allowing dense side-by-side stacking without increasing rail length. Electrical draw from the controller side is limited to 0.13 W, which minimizes heat and eases power-supply sizing inside the cabinet. System logic and sensor feeds share a nominal supply of 24 VDC, and that voltage is routed internally so no extra wiring is required between slices. Installation is flexible because the enclosure can be mounted horizontal or vertical while maintaining the required clearances. A backplane pitch of 12.5 +0.2 mm sets the spacing of the card-edge contacts for reliable data exchange between modules. The enclosure has an IP20 rating, which provides finger-safe protection once the unit is locked onto the rail inside a cabinet.

At the power handoff point to downstream modules, the bus contact system tolerates up to 10 A of continuous load. The internal I/O supply is connected through, so the 24 V feed enters on the bus module and exits unchanged to each subsequent terminal without additional jumpers. This uninterrupted supply path supports direct placement of higher-current I/O slices beside the coupler and keeps expansion of the node straightforward. It also helps maintain orderly wiring because the supply passes through the station without separate bridging connections between modules.