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4.5.6 Potential equalisation
Rittal recommends connecting a conductor with a
nominal cross-section of at least 6 mm
tial equalisation connection point in wall-mounted
cooling units, and incorporating it into the existing
potential equalisation system.
According to the standard, the PE conductor in the
mains connection cable is not classified as an equi-
potential bonding conductor.
4.6 Carrying out the electrical installation
4.6.1 Bus connection
(only in conjunction with several units with
a Comfort controller)
When using several cooling units, the serial device
interface can be used to connect up to 10 cooling
units with the bus cable (Model No. SK 3124.100).
Rittal cooling unit assembly instructions
4 Assembly and connection
2
to the poten-
When interconnecting, please note the following:
– De-energise the cooling units to be connected.
– Ensure proper electrical insulation.
– Make sure the cables are not laid in parallel to
power lines.
– Make sure that the lines are short.
Note:
The electrical signals at the X2 interface are
extra-low voltages (not safety extra-low
voltages to EN 60 335-1).
GB
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