Bộ công tắc báo mức nước Gestra NRS 1-51
Technical Data
Supply voltage
24 VDC +/– 20 %, 0,3 A;
100 – 240 VAC +10/–15 %, 47 – 63 Hz, 0,2 A (optional)External fuse
0.5 A (semi-delay)
Power consumption
7VA
Sensitivity of response
(Electrical conductivity of water at 25 °C):
> 0.5 … < 1000 μS/cm or
> 10 … < 10000 μS/cm
Inputs:
Electrical connection of level electrode
To connect the level electrode please use:
n For level switch NRS 1-51 with response sensitivity 10 μS:
Screened multi-core control cable, min. conductor size 0.5
mm2, e.g. LiYCY 4 x 0.5 mm2, max. length 100 m.
n For level switch NRS 1-51 with response sensitivity 0.5 μS: Double-screened multi-core low-capacitance data cable, min. conductor size 0.5 mm2, Li2YCY PiMF 2 x 2 x 0.5 mm2,
max. length 30 m.
Stand-by input
1 volt-free input, 18 – 36 VDC, for monitoring the purging and bypass time.
Max. bypass time: 5 minutes.
Wiring: control cable 2 x 0.5 mm2.
Outputs:
Control circuit
2 volt-free make contacts,
6 A 250 V AC / 30 V DC cos φ = 1
Delay of response: 3 seconds
Provide inductive loads with RC combinations according to manufacturer’s speci cation to ensure interference sup- pression.
Signal output
1 volt-free output for instantaneous external signalling,
24 V DC, max. 100 mA (semiconductor output).
Wiring: control cable 2 x 0.5 mm2.
Indicators and adjustors
1 button for test and diagnosis,
2 red/green LEDs for indicating the operating mode and alarm.
3 red LEDs for diagnosis.
Housing
Housing material: base: polycarbonate, black; front: polycarbonate, grey. Terminal strips separately detachable Fixing of housing: Mounting clip on supporting rail TH 35, EN 60715.
Electrical safety
Degree of contamination: 2, overvoltage category III to
EN 61010-01.
Protection
Housing: IP 40 to EN 60529
Terminal strip: IP 20 to EN 60529
Weight
approx. 0.5 kg
