IFM efector300 VS3000 Operating Instructions Manual page 14

Power supply (Power)
Terminal 1: L (AC unit) / L+ (DC unit).
Terminal 2: N (AC unit) / L- (DC unit).
For DC units the supply voltage must be protected externally (max.
2 A).
The terminals of the DC supply are directly linked with the terminals
of the sensor supply. This is why the SELV criteria must be adhered to
for DC supply (protective low voltage, circuit galvanically separated
from other circuits, not earthed).
If the DC circuit is to be earthed (e.g. because of national regulations),
the PELV criteria have to be adhered to (protective low voltage, circuit
galvanically separated from other circuits).
If the unit is supplied with AC voltage, the low voltage supply for the
sensors meets the SELV criteria.
Connection of sensors
Please also adhere to the SELV criteria for the sensor connection so
that there is no dangerous contact voltage at the sensor which can
enter the unit!
Relay outputs
The voltage between the different output circuits (terminals 4, 5, 6 –
terminals 7, 8, 9 – terminals 10, 11, 12) must not exceed the permis-
sible maximum value of 300 V AC.
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