© Brüel & Kjær Vibro
● C107758.002 / V04
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Brüel & Kjær Vibro
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Installation instruction VCM-3 / VCM-3 Ex
Power connections
EN
UNRESTRICTED DOCUMENT
IMPORTANT NOTE!
A surge pro24 V (nominal) SELV DC power supply must be used as supply for
the VCM-3 / VCM-3 Ex. (SELV
– Safety Extra Low Voltage).
The power supply must have an output voltage from +18 V to +26 V and a current
capacity of minimum 1,6 A and max. 30 W.
The output from the power supply should be ‘floating’ (above ground) and should not
supply other equipment. This will ensure that noise is avoided in the system.
The power supply must be insulated and limited energy in accordance with UL61010-1
or UL60950-1 or Class 2 in accordance with NEC.
The power supply must be connected through a circuit breaker that complies with IEC
60947-1 and IEC 60947-3.
If several VCM-
3’s is mounted in the same enclosure, one common power supply can
be used.
6.2
Power connection
– External sensor power
The external sensor power SP terminal is connected internally to the SP terminal on channel
1-10 and 13-16 on the VCM-3. The most common application of this additional supply is -24 V supply
voltage for displacement sensors. However, sensors requiring positive supply voltage can also be
supplied through this terminal. Use the free terminals in the power connection terminal block for
connecting the sensor power.
Max. wire size 2,5 mm
2
with ferrule and plastic sleeve.
