CAN-Bus: Delay times 217
imc CANSAS Users Manual - Doc. Version 1.9 - 05.12.2014© 2014 imc Meßsysteme GmbH
5.4 Isolation, Grounding and Shielding
5.4.1 Isolation
imc CANSAS-modules consist of 3 components which are all mutually isolated as well as from the
enclosure (CHASSIS):
Analog-inputs
Power supply unit
CAN-bus
5.4.2 Grounding
It is assumed that the module enclosure (CHASSIS) is electrically grounded as part of its installation.
The dark (gray), oxidized aluminum enclosure is, by virtue of the oxidization, non-conducting or very
weakly conducting. Therefore, when grounding, use the attachment nuts on the enclosure faces (beside
the DSUB-sockets).
When the module enclosure is grounded, the guidelines for "Base-isolation" (as per DIN 61010-1,
Contamination Level 1) are valid for the isolation voltages vis-à-vis the enclosure.
For the mutual isolation of the input channels, the valid guidelines are those for "double isolation“ (as per
DIN 61010-1, Contamination Level 1), see technical specification of the modes.
imc CANSAS-SL, imc µ-CANSAS and imc µ-CANSAS-HUB4
With these module types, it is possible to use the cable shielding of the CAN terminals, or the Chassis
contact taking the form of a fastening bolt (only with imc CANSAS-SL, imc µ-CANSAS-HUB4 and the 4-
channel imc µ-CANSAS), to establish the housing voltage level.
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