B&R X20BM11 X20 Bus Module

Description

The B&R X20BM11 is a specialized X20 bus module designed to function as a base for X20 I/O modules, establishing the internal backplane connection and distribution of the internal I/O power supply. This module features a 24 VDC mechanical keying mechanism to prevent incorrect module insertion and ensure hardware compatibility within the system configuration. It provides a continuous internal I/O supply across the backplane, allowing seamless power and data distribution to adjacent modules. The unit is optimized for space-constrained industrial control cabinets, utilizing a compact format to maximize density. It integrates directly into standard B&R X20 control systems, serving high-performance machinery, factory automation, and process engineering setups that demand reliable modular distribution.

Features

• Integrates the standard X20 backplane bus for internal data routing.
• Features a 24 VDC mechanical keying system to safeguard hardware against incorrect module installation.
• Delivers continuous internal I/O supply distribution across the system rail.
• Compact layout with a precise 12.5 mm pitch to support high-density panel builds.
• Low power consumption from the bus to maintain system efficiency.

Applications

• Central and distributed I/O topologies in factory automation.
• Machine control systems requiring modular I/O expansion.
• Process control infrastructure and assembly line sequencing.
• Power distribution and signal isolation within X20 controller racks.

Technical Specifications

Installation Guidelines

DIN Rail Installation

Mount the bus module vertically or horizontally onto a standard 35 mm DIN rail. Ensure the module snaps securely into place on the rail tracking before mounting any electronic I/O modules.

Internal I/O Supply and Keying

Verify that the 24 VDC keying matches the electronic module intended for insertion. The continuous internal supply transfers power across the backplane contacts; inspect alignment pins prior to seating to avoid terminal damage.

Cooling and Ventilation

Maintain the recommended clearances above and below the X20 module rack to allow natural convection cooling. Avoid placing high-dissipation heat sources directly underneath the module array.

FAQ

What is the primary function of this hardware?

It serves as the structural base and electrical backplane connector for the X20 I/O system, enabling data transfer and power routing between modules.

Does this base module isolate the I/O power supply?

No, it provides a continuous internal I/O supply connection across the bus station.

What does the 24 VDC keying specification mean?

It means the module has mechanical coding that only accepts X20 electronic modules designed for 24 VDC operation, preventing voltage mismatches.

What is the maximum contact load capacity for the internal bus?

The permissible contact load is rated at a maximum of 10 A.

How much power does the unit draw from the bus?

The module has an internal bus power consumption of 0.13 W.

What is the exact physical pitch of the unit?

The pitch is 12.5 mm with a tolerance allowance of +0.2 mm.

Can this unit be swapped out while the system is live?

Hot-swapping capabilities depend on the specific configuration of the main X20 controller and the electronic module inserted into it; refer to the system manual before removal.

Does the module require independent software configuration?

No, it acts as a passive physical and electrical backplane link and does not require independent firmware setup.

How is the module secured to the control panel?

It snaps directly onto a standard 35 mm DIN rail and interlocks laterally with adjacent X20 bus modules.

What happens if a module with a different voltage rating is inserted?

The mechanical keying mechanism physically blocks the insertion of modules that do not match the 24 VDC configuration.