GESTRA NRS 1-50, Оригинальная инструкция по установке

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8 NRS 1-50 For TWO Electrodes - Installation Instructions -
818953-08
NRS 1-50
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
7 VA
Response sensitivity (Electrical conductivity of water at 25 °C)
> 0.5 ... < 1000 µS/cm or
> 10 ... < 10000 µS/cm
Electrical connection of level electrode
2 inputs for level electrode NRG 1...-50, NRG 1...-11, NRG 16-36, 4 poles, with screen,
Sensitivity 0.5 μS/cm or 10 μS/cm (at 25 °C).
Stand-by input
2 volt-free inputs, 24 V DC, for monitoring the purging and bypass time.
Max. bypass time: 5 minutes.
Safety circuit
2 volt-free make contacts, 6 A 250 V AC / 30 V DC cos
ϕ
= 1.
Delay of response: 3 seconds, 15 sec. for marine applications.
Provide inductive loads with RC combinations according to manufacturer's specification to ensure
interference suppression.
Signal output
2 volt-free outputs for instantaneous external signalling, 24 VDC, max. 100 mA (semiconductor output).
Indicators and adjustors
2 buttons for test and diagnosis,
2 red/green LEDs for indicating the operating mode and alarm.
3 red LEDs for diagnosis,
2 two-pole code switches for setting the number of electrodes.
Housing
Housing material: base: polycarbonate, black; front: polycarbonate, grey.
Cross section of connection: 1 x 4.0 mm
2
solid per wire or
1 x 2.5 mm
2
per stranded wire with sleeve to DIN 46228 or
2 x 1.4 mm
2
per stranded wire with sleeve to DIN 46228; terminal strips can be detached
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
Technical Data