Siemens SITRANS L Series Operating Instructions Manual - Page 20

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Connecting

5.1

Safety instructions

Always keep in mind the following safety instructions:

•

Only connect or disconnect in de-energized state.

Voltage supply

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

Note

Power the transmitter via an energy-limited circuit (power max. 100 W) acc. to

IEC 61010-1, e.g.

•

Keep in mind the following additional factors that influence the operating voltage:

•

Connection cable

The transmitter is connected with standard four-wire cable. If electromagnetic

interference is expected which is above the test values of EN 61326-1 for industrial

areas, shielded cable should be used.

SITRANS LCS050

Operating Instructions, 02/2021,

A5E50859888

Carry out electrical connection by trained, qualified personnel authorised by the

plant operator

If overvoltage surges are expected, overvoltage arresters should be installed

WARNING

Class 2 power supply unit (acc. to UL1310)

SELV power supply unit (safety extra-low voltage) with suitable internal or

external limitation of the output current

Lower output voltage of the power supply unit under nominal load

Influence of additional transmitters in the circuit (see load values in chapter "

Technical data")