B&R AUTOMATION X20-BM31 BUS MODULE,
The B&R AUTOMATION X20-BM31 is a high-performance, double-width bus module designed for the modular X20 System PLC and I/O platform. This module acts as the mechanical and electrical foundation (backplane) for double-width X20 electronic modules. It establishes seamless data bus connections and distributes the internal I/O supply voltage across the rail. Its pre-wiring design allows for “Hot-Pluggable” servicing, meaning electronic modules can be replaced without disconnecting your field wiring or interrupting the rest of the PLC rack.
| Specifications | |
| Product Make | B&R AUTOMATION |
| Nominal I/O Supply Voltage | 24 VAC |
| Permissible Contact Load (Max Current) | 10 A continuous pass-through |
| Bus Power Consumption | 0.13 W |
| Internal I/O Power Supply | Continuously connected / looped through adjacent units |
| Mechanical Coding | 24 VDC keyed to prevent mismatching electronic module types |
| B&R ID Code | 0xE55A |
| Module Type | Bus Module (Base) |
| Design Type | X20 double-width |
| Current Capacity | Supports internal I/O power routing up to 10 A |
| Condition | GOOD |
| Warranty | 3 Months |
| Country of Origin | Austria |
| Protection Degree | IP20 |
| Length | 77 mm |
| Width | 25 mm |
| Height | 99 mm |
| Weight | 54g |








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