Connecting - Siemens SITRANS L Series Operating Instructions Manual

Connecting

Wiring safety precautions
• Open SITRANS LVS100/200 only when supply voltage is switched off.
• All field wiring must have insulation suitable for at least 250 V AC.
• A disconnect switch must be in close proximity to the equipment and within easy reach
• Unused cable conduit fittings must be locked with a closing element or plug.
• Observe all pertinent rules and regulations in the country of installation.
European requirements
Cable gland/closing element: The screwed cable gland and closing element must have the
following specifications: Ingress protection IP66, temperature range from -40 to 70 °C (-40 to
158 °F), UL or VDE certified (depending on the country where the unit is installed), pull relief.
● Make sure the screwed cable gland safely seals the cable and that it is tight (danger of
water intrusion). Cable glands that are not used have to be locked with a closing element.
Conduit system: In case of using a conduit system (with NPT thread) instead of a cable
gland, the regulations of the country where the unit is installed must be observed. The
conduit must have a tapered thread either 1/2" NPT or 3/4" NPT in accordance with the unit
and ANSI B 1.20.1. Not used inlets must be closed tight with a metal closing element.
Cable glands and conduit system for ATEX/IECEx (Dust and Gas Hazardous Locations):
Installation according to the regulations of the country where the unit is installed.
● Not used entries have to be closed with blanking elements certified for this purpose.
Where available, the factory provided parts must be used. A strain relief must be provided
for the field wiring cables, when the device is installed with the factory provided cable
glands.
● The diameter of the field wiring cable must match to the clamping range of the cable
clamp.
● If other than the factory provided parts are used, the following must be ensured:
– The parts must have an approval adequate to the approval of the level sensor
– The approved temperature range must be from the min. ambient temperature of the
– The parts must be mounted according to the instructions of the supplier.
20
WARNING
of the operator.
(certificate and type of protection).
level sensor to the max. ambient temperature of the level sensor increased by 10K.
SITRANS LVS100/200
Operating Instructions, 01/2019, A5E44839609-AA
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