Mounting Instructions; Connecting To Power Supply; Preparing The Connection; Wiring Plan - SICK LFV 200 Manuel De Mise En Service

Handling
Do not hold LFV 200 on the tuning fork. Bending the
vibrating element will destroy the instrument.

3.2 Mounting instructions

Welded socket
For threaded versions of LFV 200 in combination
with a mounting boss with O-ring in front and
welding marking.
LFV 200 with thread sizes ¾" and 1" have a dened
thread runout. This means that every LFV 200 is in
the same position after being screwed in. Remove
therefore the supplied at seal from the thread of
LFV 200. This at seal is not required when using a
welded socket with front-ush seal.
Before welding, unscrew LFV 200 and remove the
rubber ring from the welded socket.
The welded socket is provided with a marking
(notch). For horizontal mounting, weld the socket
with the notch facing upward or downward; in
pipelines (DN 25 to DN 50) aligned with the direction
of ow.
Fig. 15: Marking on the welded socket
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Marking
Adhesive products
In case of horizontal mounting in adhesive and
viscous products, the surfaces of the tuning fork
should be vertical. The position of the tuning fork is
indicated by a marking on the hexagon of LFV 200.
With this, you can check the position of the tuning
fork when mounting it.
In case of horizontal mounting in adhesive and
viscous products, the tuning fork should protrude
into the vessel to avoid buildup on the tuning fork.
LFV 200
Flows
To make sure the tuning fork of LFV 200 generates
as little resistance as possible to product ow,
mount the sensor so that the surfaces are parallel to
the product movement.

4 Connecting to power supply

4.1 Preparing the connection

Note safety instructions
Always keep in mind the following safety instru-
ctions:
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4.2 Wiring plan

Contactless electronic switch
The instrument is used for direct control of relays,
contactors, magnet valves, warning lights, horns etc.
It must not be operated without intermediately
connected load, because the electronic would be
destroyed if connected directly to mains. It is not
suitable for connection to low voltage PLC inputs.
Domestic current is temporarily lowered below 1 mA
after switching off the load so that contactors,
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whose holding current is lower than the constant
domestic current of the electronics (3 mA), are
reliably switched off.
Examples for typical applications:
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For the plug version valve plug ISO 4400, standard
cable with round wire cross-section can be used.
Cable diameter 4.5 ... 7 mm, protection IP 65.
Subject to change without notice
Connecting to power supply
Connect only in the complete absence of line
voltage
Load resistance at 24 V DC: 88 ... 1800 Ω
Rated power, relay 253 V AC: > 2.5 VA
Rated power, relay 24 V AC: > 0.5 VA
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