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Note safety instructions

Take note of safety

instructions for Ex

applications

Voltage supply

Connection cable

for Ex applications

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 off power supply, before connecting or disconnect-

ing the instrument.

In hazardous areas you must take note of the respective regulations,

conformity and type approval certificates 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 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

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 ... 9 mm (0.2 ... 0.35 in) ensures the seal effect of the cable gland.

If you are using cable with a different 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

2. Loosen compression nut of the cable entry gland

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

SITRANS LVL200E - Operating Instructions

*7ML19985KY01*