X20BB47 B & R Automation
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The X20BB47 is a fieldbus I/O module from the X20 Fieldbus Input Output Modules series by B & R Automation, featuring one CAN bus port with an integrated terminating resistor and one RS232 port. It allows horizontal or vertical mounting and operates at a nominal voltage of 24 VDC. The module offers a bus power consumption of 0.56 W, has a permissible contact load of 10 A, and is rated IP20 for protection.
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Product Description:
The X20BB47 is a backplane bus module produced by B&R Automation for the X20 Fieldbus Input Output Modules series. Installed at the edge of an X20 slice, it links powered terminal blocks to field controllers and distributes supply and communication lines to subsequent I/O modules, allowing mixed signal groups on the same DIN rail. In industrial automation systems it forms the electrical and mechanical backbone that ties digital or analog nodes to the higher-level PLC over fieldbus networks.
This module is energized from a control cabinet source rated at 24 VDC, and its internal electronics draw only 0.56 W, minimizing heat accumulation in densely packed racks. Two mezzanine connectors provide 2 interface slots so that neighboring I/O slices can pass both power and data without extra wiring. For distributed motion or sensor clusters the board exposes 1 CAN bus port; an integrated resistor terminates the segment when the unit is at the physical end of the trunk. Legacy serial diagnostics are supported by 1 RS232 port, giving installers a direct channel for firmware or parameter access without occupying the fieldbus.
The environmental profile aligns with control cabinet deployment. Its housing carries an ingress protection of IP20, signifying finger-safe touch protection yet requiring enclosure mounting for dust or splash areas. Operation is specified up to 2000 m elevation with no output reduction; beyond this point thermal margins lower by 0.5 °C/100 m. The backplane conductors and spring terminals accept loads up to 10 A, enabling the module to forward auxiliary power to high-current output slices such as relay or valve manifolds while maintaining the mechanical pitch of 87.5 mm and allowing horizontal or vertical rail orientation with left and right end-cover plates in place.
