Wiring Notes
Hardware Manual • Doc.-No.: C.3010.21 / Rev. 1.3
CAN-CBM-Clock
Page 28 of 34
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6.3.2 Device Cabling
NOTICE
If single shielded double twisted pair cables are used, realize the T-connections by
means of connectors that support connection of two CAN cables at one connector
where the cable’s shield is looped through e.g. DSUB9-connector from ERNI (ERBIC
CAN BUS MAX, order no.:154039).
The usage of esd’s T-connector type C.1311.03 is not recommended for single shielded
double twisted pair cables because the shield potential of the conductive DSUB
housing is not looped through this T-connector type.
If a mixed application of single twisted and double twisted cables is unavoidable, take
care that the CAN_GND line is not interrupted!
Fig. 9: Example for proper wiring with single shielded double twisted pair cables
6.3.3 Termination
A termination resistor has to be connected at both ends of the CAN bus. If an integrated CAN
termination resistor which is equipped at the CAN interface at the end of the bus is connected, this
one has to be used for termination instead of an external CAN termination plug.
9-pin DSUB-termination connectors with integrated termination resistor and male and female
contacts are available from esd (order no. C.1303.01).
9-pin DSUB-connectors with integrated switchable termination resistor can be ordered e.g. from
ERNI (ERBIC CAN BUS MAX, female contacts, order no.:154039).