BK52x0/BX5200: 5-pin open style connector

The BK52x0/BX5200 (X520) Bus Couplers have a recessed front surface on the left hand side with a five pin connector.
The supplied DeviceNet connecting socket can be inserted here.

The left figure shows the socket in the BK52x0/BX5200 Bus Coupler. Pin 5 is the connection strip's top most pin. Pin 5 is not used. Pin 4 is the CAN high connection, pin 2 is the CAN low connection, and the shield is connected to pin 3 (which is connected to the mounting rail via an R/C network). CAN-GND can optionally be connected to pin 1. If all the CAN ground pins are connected, this provides a common reference potential for the CAN transceivers in the network. It is recommended that the CAN GND be connected to earth at one location, so that the common CAN reference potential is close to the supply potential. Since the CANopen BK52x0/BX5200 Bus Couplers provide full electrical isolation of the bus connection, it may in appropriate cases be possible to omit wiring up the CAN ground.