Siemens SITRANS L Series - 5 Connecting

SITRANS LVS100/200
20 Operating Instructions, 01/2019, A5E44839609-AA
Connecting
5
WARNING
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
of the operator.
• 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
(certificate and type of protection).
– The approved temperature range must be from the min. ambient temperature of the
level sensor to the max. ambient temperature of the level sensor increased by 10K.
– The parts must be mounted according to the instructions of the supplier.