Siemens SITRANS LVL200E - Connecting to Power Supply; Preparing the Electrical Connection; Voltage Supply Requirements; Connection Cable Specifications

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MAN-100411
SITRANS LVL200E - Operating Instructions
55328-EN-170712
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.
•
Alwaysswitchopowersupply,beforeconnectingordisconnect-
ing the instrument.
Inhazardousareasyoumusttakenoteoftherespectiveregulations,
conformityandtypeapprovalcerticatesofthesensorsandpower
supply units.
Connect the voltage supply according to the following diagrams. Take
note of the general installation regulations. As a rule, connect SI-
TRANS LVL200E 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oelectrostaticcharges.InExapplications,theinstal-
lationregulationsforhazardousareasmustbegivenpriority.
Thedataforpowersupplyarespeciedinchapter"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.
Make sure that the cable used has the required temperature resist-
anceandresafetyformax.occurringambienttemperature
Use cable with round cross-section. A cable outer diameter of
5…9mm(0.2…0.35in)ensuresthesealeectofthecablegland.
Ifyouareusingcablewithadierentdiameterorcross-section,
exchange the seal or use a suitable cable gland.
Inhazardousareas,useonlyapprovedcableconnectionsforSI-
TRANS LVL200E.
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
Note safety instructions
Take note of safety
instructions for Ex
applications
Voltage supply
Connection cable
Connection cable
for Ex applications