Flowserve NRS1-9 - Manual (Page 9)

9
Technical Data
Type approval no.
TÜV · WR/WB · 99-370
Input
8 connections for one level electrode NRG 16-36, PN 40
Output contacts
For level limiter part:
Two volt-free relay contacts
For level controller part:
One volt-free working contact for feedwater on-off control.
One volt-free relay contact for high level alarm.
Contact material silver, hard gold plated.
Max. contact rating with switching voltages of 24 V, 115 V and 230 V a.c.:
4 A resistive, 0.75 A inductive at cos
ϕ
0.5
Max. contact rating with switching voltage of 24 V d.c.: 4 A
Delay of response
The low water level alarm signal is factory set to react after a time delay of
1 or 3 seconds (up to 25 sec. delay is possible).
The controller as well as the high water level alarm signal is factory set to react after
a time delay of 2 seconds.
Sensitivity
Range 1: 10
µ
S/cm at 25 °C
Range 2: 0.5
µ
S/cm at 25 °C
The selection of the above range is done via a code switch.
Indicators and adjustors
One green LED “Power”, two LEDs “Low level alarm”, one test button “TEST 1”, one
toggle switch “TEST 2/INSPECTION”, one LED “Feedwater control on”, one LED
“High level alarm” and one four-pole code switch.
Mains supply
230 V +/– 10 %, 50/60 Hz (please state voltage when ordering)
Special voltage: 115 V +/– 10 %, 50/60 Hz or 24 V +/– 10 %, 50/60 Hz;
24 V d. c. supply is also possible with the inverter type URN-1.
Protection
IP 20 in accordance with DIN 40050
Admissible ambient temperature
0 to 55 °C
Case materials
Base: ABS plastic, black. Cover: polystyrene, highly shock resistant, stone grey.
Weight
0.6 kg
Explanatory Notes
– continued –
Design
NRS 1-9 b:
Plug-in unit in plastic case for snapping onto a 35 mm rail (TS 35 x 15 according to
DIN EN 50022-35) or for installation in control