Electrical Connection; Wiring Details - WIKA F-20 Betriebsanleitung

7. Starting, operation

Electrical connection

Connect the instrument to earth via the pressure connection and/or connection
„
terminal 5.
Operate the pressure transmitter with a shielded cable and earth the shield at least on
„
one side of the cable, if the cable is longer than 30m (2-wire) or 3m (3- or 4-wire), or if
it is run outside of the building.
Ingress protection per IEC 60529 (The ingress protection classes specified only apply
„
while the pressure transmitter is connected with female connectors that provide the
corresponding ingress protection).
Ensure that the cable diameter you select fits to the cable gland of the connector.
„
Ensure that the cable gland of the mounted connector is positioned correctly and
that the sealings are available and undamaged. Tighten the threaded connection and
check the correct position of the sealings in order to ensure the ingress protection.
„ Please make sure that the ends of cables with flying leads do not allow any ingress of
moisture.
8 WIKA Operating instructions / Betriebsanleitung
GB
F-20, F-21
7. Starting, operation

Wiring details

Field case (with internal spring clip terminals)
2-wire U+ = 1
3-wire U+ = 1
Wire gauge 7-13 mm
Ingress protection per
IP 67
IEC 60 529
The ingress protection classes specified only apply while the pressure transmitter is
connected with female connectors that provide the corresponding ingress protection.
Cable connection in the spring clip terminal
„ Cover the stripped wire ends with end splices.
„ Unscrew the case cover.
Loosen the cable gland using an open-end wrench, wrench size 24.
„
Lead the cable through the cable gland into the opened case head.
„
Press the corresponding plastic lever at the spring clip terminal down using a screw driver,
„
so that the clamped contact will be released.
Lead the prepared flying lead into the opening and let go of the plastic lever, so that the
„
flying lead will be squeezed inside the spring clip terminal.
After connecting the individual wires, tighten the cable gland and screw down the case
„
over.
Function of the test circuit for 2-wire
By means of the test circuit the current can be metered during normal operation without
having to disconnect the instrument. For that purpose you have to connect an ammeter
(internal resistance < 15 Ohm) to the test +/- terminals.
WIKA Operating instructions / Betriebsanleitung
U- = 2 Test+ = 3 Test- = 4
U- = 2 S+ = 3 screen = 5
F-20, F-21
GB
screen = 5
9