Communications Card Description ZB4-606-IF1, DeviceNet 6-6
Moeller 07/01 AWB-C2700-1347GB
5 Cable and wiring design
The design of the Bus cable on the DeviceNet is a significant factor for influencing reliable operation as well
as for the electromagnetic compatibility (EMC) of the communication card and the hardware to which it is
connected.
WARNING ! The EMC related values (immunity and emission) stated in the technical data of the
hardware which is to be connected, can only be guaranteed if the following
prescribed cable design features are observed. Failure to comply with the limits
defined for cable length as well as operation without line terminations or with
incorrect line terminations can lead to data transfer errors!
5.1 Cable lengths
The maximum cable length as well as the maximum length of stub lines is dependent on the baud rate.
Baud rate Maximum cable length Maximum stub line length
500 kBit/s 100m 0.8m
250 kBit/s 250m 1.5m
125 kBit/s 500m 3.0m
The maximum cable lengths can be increased when repeaters are used. Exact details can be found in the
documentation of the repeater manufacturer
5.2 Line termination
The CAN line must be provided on both ends with a line termination. The termination can be provided on the
communication card with the jumper J1, refer to section 4.
If none of the connected nodes are active (all nodes tri-state), the line termination provides a defined
quiescent state on the bus.
WARNING ! The bus segment must be terminated at both ends!
More than two terminations per bus segment are not permitted!
Operation without the use of correct terminations can cause data transfer errors.
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