Product Description

The X20BB37 is a robust B&R Industrial Automation bus base module that serves as a backbone for other unit modules. Its main function is to hold X20 Fieldbus CPUs, power modules, or interface modules. Unlike other basic bus base modules, the X20BB37 provides two interfaces for serial communication. These two interfaces are dedicated to establishing RS232 and CAN bus communication. The CAN bus interface for this bus base module also integrates a terminating resistor. Terminating resistors are crucial for CAN serial communication because they prevent signals from reflecting back to the source. Aside from its interfaces, it also comes with the rudimentary accessories, X20AC0SL1 and X20AC0SR1, which are the left and right cover plates.

The X20BB37's I/O supply requires a terminal potential difference of 24 volts while allowing only a contact load of up to 10 amps. During rated operation, this module's bus draws 0.56 watts to carry out its intended function. No other actuators or components contribute to the total power consumption of the X20BB37. Although it provides interfaces for RS232 and CAN bus communication, isolation between these interfaces and the main bus is not supported. The terminating resistor provided for the CAN bus may be toggled using a mechanical switch. For this bus base module, the recommended spacing is 62.5 millimeters.

To prolong the X20BB37's lifespan, it is recommended to adhere to the specified temperature ranges, whether during operation, transport, or storage. Specifically, the recommended temperature range for this bus base module during operation is between -25 and 60 degrees Celsius. To safely store and transport this base module, the environmental temperature at any time must be within -40 to 80 degrees Celsius.