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Important Notes
Danger
The terminal strip of the NRS 2-4 is live during operation.
This presents the danger of electric shock!
Cut off power supply before inserting or removing the 19" slide-in unit and before carrying
out any installation or maintenance work.
Usage for the intended purpose
The level switch NRS 2-4 is used in conjunction with level electrode NRG 211 and signals a maximum
admissible liquid level.
Safety note
The level switch is a safety device and must only be installed, wired and commissioned by qualified and
competent staff.
Retrofitting and maintenance work must only be performed by qualified staff who – through adequate
training – have achieved a recognised level of competence.
Attention
The name plate specifies the technical features of the equipment. Note that any piece of
equipment without its specific name plate must neither be commissioned nor operated.
LV (Low Voltage) Directive and EMC (Electromagnetic Compatibility)
The level switch NRS 2-4 meets the requirements of the Low Voltage Directive 2014/35/EC and the
EMC Directive 2014/30/EC.
ATEX (Atmosphère Explosible)
According to the European Directive 2014/34/EC the level switch NRS 2-4 must not be used in
potentially explosive areas.
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