Routing guildelines
- Ground and UEBUS power supply can be routed to partial surfaces within a plane.
- The differential E-bus signals have to be routed on internal layers.
- On the E-bus TX and RX routing layer free space between the signals shall be filled with copper connected to GND.
12-mm modules E-bus routing
24-mm modules E-bus routing (e.g. EJ7342)
24-mm modules, where the E-bus has to be connected to the left or right connector either (e.g. EJ7342), shall be routed in a way shown in the following Figure.
In the area of the module connectors, the trace width and spacing may be reduced, if necessary (see following fig. (A)).
If available in the design software the option Unused Pad Suppression may be helpful to generate more routing space between the connector pins.
Signal ground routing
The shield ground pins may be connected and routed on the top layer of the PCB (see fig. Top layer).
Ensure proper connection of the SGND signal with the mounting plate and the control cabinet!
Further Information