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4
ELECTRICAL CONNECTIONS
32
OPTISYS SLM 2100
www.krohne.com 01/2017 - 4002737304 - MA OPTISYS SLM 2100 R04 en
4.7 Connecting the power supply
DANGER!
Never install or operate the device in potentially explosive areas, it might cause an explosion that
can result in fatal injuries!
DANGER!
The device must be grounded in accordance with regulations in order to protect personnel
against electric shocks.
CAUTION!
When connecting the power supply, always note the safety regulations of the current state of the
art. To avoid fatal injuries, destruction or damage of the device or measuring errors, also note
the following items:
•
De-energise the cables of the power supply before you start any installation works!
•
Ground the device (cross section of the wire is 6 mm
2
/ 10 AWG).
•
The device must be led over a ground fault circuit interrupter (GFCI) 0.03 A which has to be
tested every 6 months.
•
Inspect the continuous PE conductor connection to all contactable metal parts by carrying out
a standardised procedure (The maximum allowed resistance is 0.5 Ohm).
•
Assure that there is a fuse protection for the infeed power circuit (I
nom
≤
6 A).
•
Check the nameplate and assure that the power supply meets the voltage and frequency of
the device. The device can be operated with 230 VAC (-15/+10%) at 50 Hz (
±
10%) and max.
150 VA. A power supply outside these specifications may destroy the device!
•
Assure that the protective earth conductor (PE) is approx. 5 mm / 0.20" longer than the L- and
N-conductor.
INFORMATION!
The operator is responsible for providing, securing and the possibility for switching off the supply
voltage.