Connecting To Power Supply; Preparing The Connection; Connection Procedure - Vega VEGACAP 65 Operating Instructions Manual

Safety instructions
Voltage supply
Connection cable
VEGACAP 65 • Two-wire
5

Connecting to power supply

5.1

Preparing the connection

Always keep in mind the following safety instructions:
•
Carry out electrical connection by trained, qualified personnel
authorised by the plant operator
Warning:
Only connect or disconnect in de-energized state.
Connect the operating voltage according to the following diagrams.
Take note of the general installation regulations. As a rule, connect
VEGACAP 65 to vessel ground (PA), or in case of plastic vessels,
to the next ground potential. On the side of the instrument housing
there is a ground terminal between the cable entries. This connection
serves to drain off electrostatic charges. In Ex applications, the instal-
lation regulations for hazardous areas must be given priority.
The data for power supply are specified in chapter " Technical data".
The instrument is connected with standard two-wire cable without
shielding. If electromagnetic interference is expected which is above
the test values of EN 61326-1 for industrial areas, shielded cable
should be used.
Make sure that the cable used has the required temperature resist-
ance and fire safety for max. occurring ambient temperature
Use cable with round cross section for instruments with housing and
cable gland. To ensure the seal effect of the cable gland (IP protection
rating), find out which cable outer diameter the cable gland is suitable
for.
Use a cable gland fitting the cable diameter.
Cover all housing openings conforming to standard according to
EN 60079-1.
5.2

Connection procedure

With Ex instruments, the housing cover may only be opened if there is
no explosive atmosphere present.
Proceed as follows:
1. Unscrew the housing lid
2. Loosen compression nut of the cable gland and remove blind
plug
3. 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
4. Insert the cable into the sensor through the cable entry
5. Lift the opening levers of the terminals with a screwdriver (see
following illustration)
5 Connecting to power supply
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