Lenze 8400 - Manual (Page 213)

Electrical installation
Common control terminals
System bus connection (CANopen)
6
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213 EDS84ASC552 EN 9.1
6.6.2 System bus connection (CANopen)
Basic structure of the CAN network
Every segment of the CAN network must be terminated by resistors (120 )) between CAN
Low and CAN High. The 8400 controller has one integrated bus terminating resistor each
which can be activated via DIP switch.
The bus terminations of the system bus (CAN) are labelled by ”R” in every one of the
examples below.
If a CAN network has only one segment, the master (M) with integrated bus termination
marks the start, and the last node (S) marks the bus termination.
M
R
R
S S S
1
E94YCPM012a
Fig. 6-27 Example: CAN network with one segment
A CAN network with multiple segments includes repeaters (X) for coupling the segments.
The repeaters are equipped with integrated bus terminations.
M
R
R
S S S
1
R R R R
2 3
X
S S
X
E94YCPM012b
Fig. 6-28 Example: CAN network with repeater
If no repeater is used at the end of the segment, the bus terminating resistor on the last
node must be activated.