Burkert Type 8112 Manual do Utilizador descarregar pdf (Página 17)

5 Connecting to power supply

5.1 Preparing the connection

Always keep in mind the following safety instructions:

l Connect only in the complete absence of line voltage

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 operating voltage according to the connection diagrams.

The electronics module with relay output is designed in protection

class I. To maintain this protection class, it is absolutely necessary that

the earth conductor is connected to the inner earth conductor terminal.

Keep the general installation regulations in mind. Take note of the

corresponding installation regulations for hazardous areas with Ex

applications.

The data for power supply are speciﬁed in chapter "Technical data".

The instrument is connected with standard three-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, only use approved cable connections for LEVEL

SWITCH 8112.

Take note of the corresponding installation regulations for Ex

applications.

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 cover

2 Loosen compression nut of the cable entry

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

Note

safety instructions

ke note of the

safety instruc-

tions for Ex ap-

plications

Volta

ge supply

Conne

ction cable

Conne

ction ca-

ble for Ex appli-

cations

LEVEL SWITCH 8112 • - Relay (DPDT) 17

5 Connecting to power supply

32050-EN-120418

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