AFLOWT MFT, Руководство по установке

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protrusion as shown in Fig.C.4, after which the top plate is secured with
screws.
3.4. Wiring the Flowmeter
3.4.1. Power and communication cables are connected to the flowmeter after it
is installed into the pipeline.
Prior to connection, cut isolation from cable ends by 5 mm and after
that, connect them to the terminals on the switching module. Multicore
cables must be tinned.
3.4.2. For the flow meter in a combined version, the power and communication
cables are connected to the electronics block. Opening of back cover
BE
to make by means of a key for oil filters "UNIOR" № 205. Skip the
power cable through one cable gland, interface cable
– through the
other cable gland. Cables are connected to the connectors on the
switching module in accordance with the input and output diagrams
given in the operation manual. To ease wiring, the sticker designating
the switching module connection elements is put on the flowmeter's rear
cover.
3.4.3. The secondary converter flowmeter in the remote version comes with
mounted cables PFC-SC. Therefore, the connection of the free ends of
these cables is performed only to the PFC. For this opening of back
cover of the PFC communication block. Skip the cables through cable
glands. Cables are connected to the connectors on the switching
module (see Fig.D.1).
The maximum cable length is 10 meters. Connection of power and
communication cables to the electronics block is performed in the same
way as for the flow meter in a combined version (
п.3.4.2).
3.4.4. As a 24 V power cable you must use twin core round conductor. The
power cable should be up to 150 m long for the core cross section of
1.5 mm
2
and up to 250 m for the core cross section of 2.5 mm
2
. For the
less core cross section, cable length is reduced proportionally.
Any twin/four core round cable up to 300 m long may be used as a
communication cable for the universal outputs. Twin core shielded
cable up to 1200 m long is used as a serial interface communication
cable.
A cable for the analogue output is selected considering load rating
of the output as well as the parameters of an input connected to receive
the analogue signal.
When several interfaces are used simultaneously, e.g. both
universal outputs of the flowmeter, analogue output (or an external
button), six core cable may be used.
Cable core cross section shall be within 0.2 mm
2
to 2.5 mm
2
range.
3.4.5. The power and communication cables used must comply with the
operating conditions of the flow meter
CAUTION! To ensure the declared level of protection IP67, it is
necessary to execute following operations:
- The sealing ring of the case of the BE should be pure and intact at its
installation on the block case