Owner manual

53
DeviceNet - Design
Network Topology of a DeviceNet System12.9.
When installing a DeviceNet system, ensure that the terminating circuit of the data lines is correct. The circuit pre-
vents the occurrence of interference caused by signals reflected onto the data lines.
The trunk line must be terminated at both ends with resistors of 120Ω and 1/4 W power loss (see "Fig. 21:
Network topology").
Fig. 21: 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
Network topologyFig. 21:
Configuring the DeviceNet address / baud rate12.10.
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•
Position of the DIP switchesFig. 22:
english
Control Head Type 8681