Vega VEGABAR 81 4 … 20 mA_HART - Operating Instructions Bedienungsanleitung PDF herunterladen (Seite 22)

5 Connecting to power supply

VEGABAR 81 • 4 … 20 mA/HART

45018-EN-131010

In electroplating and CCP systems (cathodic corrosion protection) it

mustbetakenintoaccountthatsignicantpotentialdierencesexist.

This can lead to unacceptably high shield currents if the cable shield

is grounded at both ends.

Information:

Themetallicpartsoftheinstrument(processtting,transmitter,con-

centric tube, etc.) are conductively connected with the inner and outer

ground terminal on the housing. This connection exists either directly

via connecting metallic parts or, in case of instruments with external

electronics, via the screen of the special connection cable.

Youcanndspecicationsonthepotentialconnectionsinsidethe

instrument in chapter "Technical data".

5.2 Connecting

The voltage supply and signal output are connected via the spring-

loaded terminals in the housing.

The connection to the display and adjustment module or to the inter-

face adapter is carried out via contact pins in the housing.

Information:

The terminal block is pluggable and can be removed from the

electronics. To do this, lift the terminal block with a small screwdriver

and pull it out. When reinserting the terminal block, you should hear it

snap in.

Proceed as follows:

1. Unscrew the housing cover

2. If a display and adjustment module is installed, remove it by turn-

ing it slightly to the left.

3. Loosen compression nut of the cable entry

4. Remove approx. 10 cm (4 in) of the cable mantle, strip approx.

1 cm (0.4 in) of insulation from the ends of the individual wires

5. Insert the cable into the sensor through the cable entry

Fig. 15: Connection steps 5 and 6 - Single chamber housing

Connection technology

Connection procedure

1 2 ... 17 18 19 20 21 22 23 24 25 26 27 ... 83 84

Keine Kommentare

Vega VEGABAR 81 4 … 20 mA_HART - Operating Instructions Bedienungsanleitung Seite 22