Vega VEGAVIB 61 Operating instructions manual - page 15
15
5 Connecting to power supply
VEGAVIB 63 • NAMUR
31217-EN-170315
5 Connecting to power supply
5.1 Preparing the connection
Always keep in mind the following safety instructions:
Warning:
Connect only in the complete absence of line voltage.
•
The electrical connection must only be carried out by trained
personnel authorised by the plant operator.
•
Alwaysswitchoffpowersupply,beforeconnectingordisconnect-
ing the instrument.
Inhazardousareasyoumusttakenoteoftherespectiveregulations,
conformityandtypeapprovalcertificatesofthesensorsandpower
supply units.
Connect the voltage supply according to the following diagrams. Take
note of the general installation regulations. As a rule, connect VE-
GAVIB 63 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
todrainoffelectrostaticcharges.InExapplications,theinstallation
regulationsforhazardousareasmustbegivenpriority.
Thedataforpowersupplyarespecifiedinchapter"Technical data".
The instrument is connected with standard two-wire cable without
screen. If electromagnetic interference is expected which is above the
test values of EN 61326 for industrial areas, screened cable should
be used.
Use cable with round cross-section. A cable outer diameter of
5…9mm(0.2…0.35in)ensuresthesealeffectofthecablegland.
Ifyouareusingcablewithadifferentdiameterorcross-section,
exchange the seal or use a suitable cable gland.
Inhazardousareas,useonlyapprovedcableconnectionsforVE-
GAVIB 63.
Take note of the corresponding installation regulations for Ex applica-
tions.
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
Note safety instructions
Take note of safety
instructions for Ex
applications
Voltage supply
Connection cable
Connection cable
for Ex applications