Flowserve NRS 1-50 For TWO Electrodes - Manual (Page 8)

8
NRS 1-50
Supply:
Mains voltage
4 VDC +/– 0 %, 0.3 A or 00-40 VAC + 0/– 5 %, 47-63 Hz, 0. A
External fuse
0.5 A (semi-delay)
Power consumption
7 VA
Response sensitivity (Electrical conductivity of water at 5 °C)
> 0.5 ... < 000 µS/cm or
> 0 ... < 000 µS/cm
Inputs:
Electrical connection of level electrode
 inputs for level electrode NRG ...-50, NRG ...-, NRG 6-36, 4 poles, with screen,
Sensitivity 0.5 μS/cm or 0 μS/cm (at 5 °C).
Stand-by input
 volt-free inputs, 4 V DC, for monitoring the purging and bypass time.
Max. bypass time: 5 minutes.
Outputs:
Safety circuit
 volt-free make contacts, 4 V DC - 50 V AC, max. 6 A (resistive/inductive),
Contact material AgNi.
Delay of response: 3 seconds, 5 sec. for marine applications.
Provide inductive loads with RC combinations according to manufacturer's specification to ensure
interference suppression.
Signal output
 volt-free outputs for instantaneous external signalling, 4 – 30 V AC/DC, max. 00 mA.
Indicators and adjustors
 buttons for test and diagnosis,
 red/green LEDs for indicating the operating mode and alarm.
3 red LEDs for diagnosis,
 two-pole code switches for setting the number of electrodes.
Housing
Housing material: base: polycarbonate, black; front: polycarbonate, grey.
Cross section of connection:  x 4.0 mm  solid per wire or
 x .5 mm  per stranded wire with sleeve to DIN 468 or
 x .4 mm  per stranded wire with sleeve to DIN 468; terminal strips can be detached
Fixing of housing: Mounting clip on supporting rail TH 35, EN 6075
Electrical safety
Degree of contamination: , overvoltage category III to EN 600-0.
Protection
Housing:: IP 40 to EN 6059
Terminal strip: IP 0 to EN 6059
Weight
approx. 0.5 kg
Technical Data