Termination For Devicenet Systems; Network Topology Of A Devicenet System - Burkert TOP Control on/off 8631 Manuel D'utilisation

Termination for DeviceNet systems

On installation of a DeviceNet system, care must be taken to terminate the data lines correctly. The
termination avoids disturbances by signal reflections on the data lines. For this purpose, the trunk line
must be terminated at both ends, as shown, by resistors of 120 Ω and 1/4 W power dissipation.

Network topology of a DeviceNet system

Line with a trunk line and several drop lines.
Trunk and drop lines are made of identical material (see sketch).
V +
V -
CAN_H
CAN_L
Terminating
resistor
120 Ohm
¼ W
Trunk Line
DeviceNet cable
Trunk line
(Drop Lines)
T01
DeviceNet cable,
max. 6 m long
Participant 1 (Node 1)
D N
EVICE
Terminating
resistor
120 Ohm
¼ W
Tn
Participant n (Node n)
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