Siemens SITRANS LVS100 Operating Instructions Manual page 18

Wiring
WARNINGS:
• 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.
Notes:
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
installated), 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 coutnry where the unit is installed must be observed. The
conduit must have a tapered thread either ½" NPT or ¾" 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 facotry 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.
• Conduit systems for FM and CSA (Dust and Gas Hazardous Locations):
General requirements: In addition the regulations of the country must be observed. The
used flameproof seals and blanking elements must have an adequate type approval and
a temperature range of at least -40 to 80 °C (-40 to 176 °F). In addition, they shall be
suitable for the conditions and correctly installed. Where available, the provided original
parts of the manfacturer must be used.
Page EN-16 SITRANS LVS100/200 – INSTRUCTION MANUAL 7ML19985FT63