Level limit switch
Series VN 1000 / 2000 / 5000 / 6000
Technical information / Instruction manual
page
Electrical installation
General Safety Instructions
Handling
In case of inexpert handling or handling malpractice, the electric safety of the device cannot be
guaranteed.
Installation regulations
The local regulations or VDE 0100 (Regulations of German Electrotechnical Engineers) must be
observed.
With use of 24 V supply voltage, an approved power supply with reinforced insulation to mains is
required.
Fuse
Use a fuse as stated in the connection diagrams (page 22 and 23).
RCCB protection
In the case of a defect, the distribution voltage must automatically be cut off by a RCCB protection
switch to protect the user of the device from indirect contact with dangerous electric tensions.
Power supply switch
A voltage-disconnecting switch must be provided near the device.
Wiring diagram
The electrical connections are made in accordance with the wiring diagram.
Supply voltage
Compare the supply voltage applied with the specifications given on the electronic module and name
plate before switching the device on.
Cable gland
Make sure that the screwed cable gland safely seals the cable and that it is tight (danger of water
intrusion).
Cable glands that are not used have to be locked with a closing element.
Conduit system
In case of using a conduit system (with NPT thread) instead of a cable gland the regulations of the
country, where the unit is installed, must be observed. The conduit must have a tapered thread either
NPT 1/2“ or NPT 3/4” in accordance with the unit and ANSI B 1.20.1. Not used inlets must be closed tight
with a metal closing element.
Field wiring cables
• The diameter has to match to the clamping range of the used cable gland.
• The cross section has to match with the clamping range of the connection terminals and consider
the max. current.
• All field wirings must have insulation suitable for at least 250V AC.
• The temperature rating must be at least 90°C (194°F).
• If higher immunity interferences as specified in the stated EMC standards are present (see chapter
approval), a shielded cable is required, otherwise an unshielded instrumentation cable is satisfactory.
Connecting the terminals
Make sure that max. 8 mm (0.31“) of the pigtails are bared (danger of contact with live parts).
Guiding the cables in the
terminal box
Cut the field wiring cables to appropriate length to fit properly into the terminal box.
Relay and transistor
protection
Provide protection for relay contacts and output transistors to protect the device against inductive load
surges.
Protection against static
charging
The housing of the unit (and for the version with separate housing also the vibrating fork part) must
be grounded to avoid static charging of the unit. This is particularly important for applications with
pneumatic conveying and non-metallic containers .
Vibranivo
®
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VN 1000 / 2000 / 5000 / 6000 g
gi180713
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