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5 Mounting
Maschinenfabrik Reinhausen 2014
38
222/08 EN
TAPCON® 240
Figure 24: Ground strap connection
Information about shielding the CAN bus
In order for the CAN bus to operate faultlessly, you have to connect the
shielding using one of the following variants. If you are not able to use any of
the variants detailed below, we recommend using fiber optic cables. Fiber
optic cables decouple the voltage regulators and are not sensitive to electro-
magnetic interferences (surge and burst).
NOTICE
Damage to the device
If you connect the CAN bus cable to devices with different potential, current
may flow over the shielding. This current may damage the device.
► Connect the devices to a potential compensation rail to compensate for
potential.
► If both devices have different potentials, only connect the CAN bus ca-
ble's shielding to one device.
Variant 1: The connected devices share the same potential
If the devices to be connected share the same potential, proceed as follows:
1.
Connect all devices to a potential compensation rail to compensate for
the potential.
2.
Connect CAN bus cable's shielding to all connected devices.
5.3.3.4