Burkert Type 8631 - Manual (Page 31)

8631 - 29
D
EVICE
N
ET
english
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).
Terminating
resistor
120 Ohm
¼ W
Participant 1 (Node 1) Participant n (Node n)
Terminating
resistor
120 Ohm
¼ W
Trunk Line
DeviceNet cable
Trunk line
(Drop Lines)
DeviceNet cable,
max. 6 m long
CAN_L
CAN_H
V -
V +
T01 Tn