Device Net - Trunk cable vs Drop cable

[programist]

Hello,

Speaking of Device Net system, I wonder how to quickly identify whether the cable is a Trunk cable or a Drop cable?


Thank you,

 

[Ken Roach]

In general, trunk cables are thicker than drop cables.

But the actual difference is in how it's connected relative to the termination resistors.

If the cable is in a direct path between the termination resistors, it's considered the "trunk". If it connects to the trunk and goes off to a device, then it's a "drop" cable.

The cables are electrically identical except for the conductor size. Many small or low-power DeviceNet networks use thin cable everywhere, and some DeviceNets use thick or flat cable everywhere.