Michell Instruments Promet I.S., Руководство пользователя

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Promet I.S. User’s Manual
Michell Instruments 29
INSTALLATION
– 4-20mA lead
+ 4-20mA lead
4-20 mA
Supply
1
2
3
Figure 21 Pressure Transmitter Wiring Diagram
CAUTION: Always connect the 4-20 mA return signal to a
suitable load (in this case, back into the control unit) before the
power is applied. Without this connection, the transmitter may
be damaged if allowed to operate for prolonged periods.
CAUTION: When the crimps/wire ferrules are installed into the
connector terminal block ensure they are completely inserted.
When all wire connections are made, ensure that there is a
minimum clearance distance of 2mm between each terminal.
g. Press the terminal block (6) back into the outer housing (5) fi rmly (Figure
20), until a ‘click’ sound is heard.
h. Tighten the cable gland (2)
(Figure 19) around the cable. Ensure that the
sealing is not damaged and that the cable gland and seals are assembled
correctly in order to ensure ingress protection.
i. Slide the terminal block (6) onto the connection pins on the transmitter.
NOTE: There is only one orientation by which the terminal block
can be plugged onto the transmitter.