Siemens SITRANS LVL100 Manuale di istruzioni per l'uso - Pagina 17

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Contactless electronic

switch

Fig. 9: Connection, valve plug ISO 4400 with IDC crimping technology

Compression nut

Cable

Seal ring

Terminal insert

Plug housing

We recommend connecting SITRANS LVL100 in such a way that the

switching circuit is open when there is a level signal, line break or

failure (safe state).

Warning:

The instrument must not be operated without an intermediately

connected load, because the electronics would be destroyed if con-

nected directly to the mains. It is not suitable for connection to low

voltage PLC inputs.

Examples for typical applications:

•

Load resistance at 24 V DC: 88 ... 1800 Ω

•

Rated power, relay 253 V AC: > 2.5 VA

•

Rated power, relay 24 V AC: > 0.5 VA

For direct control of relays, contactors, magnet valves, warning lights,

horns etc.

Domestic current is temporarily lowered below 1 mA after switching

off the load so that contactors, whose holding current is lower than

the constant domestic current of the electronics (3 mA), are reliably

switched off.

SITRANS LVL100 - Operating Instructions