Burkert 8681, Operating Instructions Manual, Page: 68 / 166

68
DeviceNet - Design
13.9 Network topology of a DeviceNet system
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 and 1/4 W power loss (see “Fig. 30:
Network topology”).
“Fig. 30”
illustrates a line with one trunk line and several drop lines. Trunk lines and drop lines consist of
identical material.
Trunk line
DeviceNet cable
Terminating
resistor
120
Ω
¼ W
Terminating
resistor
120
Ω
¼ W
Drop lines
DeviceNet
cable,
max. 6 m long
T01 Tn
Subscriber 1 (node 1) Subscriber n (node n)
V +
V –
CAN_H
CAN_L
Fig. 30: Network topology
13.10 Configuring the DeviceNet address / baud rate
8 DIP switches are available for configuration:
• • DIP switches 1 to 6 for the DeviceNet address
• • DIP switches 7 to 8 for the baud rate
Fig. 31: Position of the DIP switches for baud rate and addressing
english
Control Head Type 8681