Electrical connection
55
Network (across several buildings) without CAN bus converter CAN-BC2:
Max. cable length: 1000 m at 50 kbit/s
The screen must be continued at every network node and earthed at a
single
point, as close to the
cable centre as possible. We recommend earthing the screen
indirectly
in the other buildings using a
gas discharge arrester. The screen is
not
connected with the earth (GND) of the devices.
Network (across several buildings) with CAN BUS converter CAN-BC2:
Maximum cable length: subject to the set Baud rate CAN-BC2
The screen of the
disconnected
network is connected at each BUS converter to CAN BUS earth
(GND). This screen must
not
be
directly
earthed.
Without CAN BUS surge arresters
, this version only protects against potential differences
up to
1 kV
, therefore cannot be considered as lightning protection. In this case, the cable screen must be
earthed at a
single
point between the CAN bus converters, as close to the cable centre as possible.
We recommend earthing the screen
indirectly
in the other buildings using a gas discharge arrester.
A CAN bus converter is similar to a repeater. It receives CAN bus signals and passes them on. Each
cable run on either side of the CAN bus converter must therefore be viewed as an independent CAN
bus network.
Indirect earthing
Option-
Option-
Indirect earthing
Optional
Indirect earthing
Indirect earthing
Indirect earthing
optional
