Wika LSO.25 Manuel d'utilisateur télécharger pdf (Page 23)

WIKA operating instructions models LSO.06, LSO.25 23

13334603.01 09/2010 GB/D/F/E

6. Commissioning, operation

The cable must not be shielded, however, should not be laid directly besides strong

electrical interference sources either. Including line resistance, contact resistance goes

the maximum line length and with that by the following table the maximum:

Wire cross section

in mm²

Wiring length

in m

Wiring resistance

in Ω

0.5 175 6.3

0.75 300 7.2

1.0 400 7.2

1.5 600 7.2

A complete resistance of 9 Ω, inclusive of contact resistances, should not be exceeded

since otherwise a failure signal is carried out.

In addition, for the explosion-protected version, a max. inductance of

≤ 0.5 mH and a max. capacitance of C

≤ 3 µF must be observed (incl.

switching amplier values).

Connection diagram transducer and switching amplier

For the explosion-protected version, a light-blue cable or one marked

light-blue must be installed from the switching amplier to the transducer

(intrinsically safe circuit). The switching amplier is located in the

non-hazardous area and the measuring body of the transducer in a Zone 1

area.

Ex zone 0/1 Safe area

Transducer

model LSO.06

Switching amplier model LSO.25

Signal Failure

The instrument can

be connected to

earth.

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Wika LSO.25 Manuel d'utilisateur Page 23