Burkert Type 8693 - Manual (Page 199)

199
DeviceNet
41.6. Terminating circuit for devicenet systems
When installing a DeviceNet system, ensure that the terminating circuit of the data lines is correct. The circuit prevents
the occurrence of interference caused by signals reflected onto the data lines. The trunk line must be terminated at
both ends with resistors of 120 Ω→each and 1/4 W power loss.
(see “Figure 123: Network topology, DeviceNet”)
41.7. network topology of a devicenet system
Line with one trunk line and several drop lines.
Trunk lines and drop lines consist of identical material (see diagram).
Trunk line
DeviceNet cable
Terminatin-
gresistor
120 Ω →
¼ W Terminatin-
gresistor
120 Ω →
¼ W
Drop lines
DeviceNet cable,
max. 6 m long
t01 tn
Subscriber 1 (node 1) Subscriber n (node n)
V + 76)
V – 76)
CAN_H
CAN_L
Figure 123: Network topology, DeviceNet
76)
not assigned, as separate supply voltage
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Type 8692, 8693