Trunk Line and Drop Line

Trunk line is a backbone cable of DeviceNet network with terminating resistors on the both ends.

Drop line is a branch of the trunk line.

For DeviceNet, 5-wire cables are used for trunk lines and drop lines. Commercially available DeviceNet cables can be used. There are two types of DeviceNet cables: Thick cable and Thin cable. Environment-resistant cable and flexible cable are available.

For details, see the website of ODVA.
https://www.odva.org/ (opens new window)

• Thick Cable

  

  Symbol	Description
  a	11.2 mm to 12.1 mm outside diameter
  b	Shield Wire
  c	Power Wire (Red/Black)
  d	Signal Wire (Blue/White)
  e	Braid Shield

• Thin Cable

  

  Symbol	Description
  a	6.9 mm outside diameter
  b	Shield Wire
  c	Power Wire (Red/Black)
  d	Signal Wire (Blue/White)
  e	Braid Shield

Communications Cable Signal

Wire Type	Color	Details of Signal		Wire Identity
Signal wire	Blue	Signal	Low	CAN L
	White	Signal	High	CAN H
Power wire	Red	Communications power supply	+ Positive	V+
	Black	Communications Power Supply	− Negative	V−
Shield Wire	-	Shield		S