6
Supply voltage
230 V +/– 10%, 50/60 Hz
115 V +/– 10%, 50/60 Hz
24 V +/– 10%, 50/60 Hz (optional)
Power consumption
5 VA
Fuse
external 63 mA , slow-blow, at 230 V and 115 V,
external 150 mA slow-blow at 24 V.
internal thermal fuse T
max
= 102 °C
Response sensitivity
(electrical conductivity of water at 25 °C)
>0.5 ...< 1000 µS/cm or >10 ...< 10 000 µS/cm (switch-selectable)
Electrode voltage
10 V
ss
Output
2 volt-free relay contacts, 8 A 250 V AC / 30 V DC cos
f
= 1
De-energizing delay: 3 sec. (MIN alarm)
1 volt-free relay contact, 8 A 250 V AC / 30 V DC cos
ϕ
= 1
(e. g. feedwater pump ON).
Provide inductive loads with RC combinations according to manufacturer’s specification to ensure
interference suppression.
Indicators and adjustors
2 red LEDs for signalling “Low water level”, 1 green LED for “Pump ON”.
1 four-pole code switch for selecting the response sensitivity.
1 push button for testing the MIN (low-level) alarm.
1 Push button “Reset”
Cable entry
Cable gland with integral cable clamp
M 16 (PG 9), M 20 (PG 16)
Protection
IP 65 to DIN EN 60529
Weight
Approx. 0.8 kg
Ambient temperature
when system is switched on: 0 ° ... 70 °C, during operation: -10 ... 70 °C
Transport temperature
–20 ... +80 °C (<100 hours), defrosting time of the de-energized equipment before it can be put into
operation: 24 hours.
Storage temperature
–20 ... +70 °C, defrosting time of the de-energized equipment before it can be put into operation:
24 hours.
Relative humidity
max. 95 %, no moisture condensation
NRGS 11-2, NRGS 16-2
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Technical Data
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