CONTROLS CONTROLS
5
Products and specifications subject to change without notice.
Consult factory for application assistance.
204 Airline Drive, Suite 300, Coppell, Texas 75019 / Tel: (800) 677-5311 / FAX: (800) 677-3865 / www.crouzet-usa.com
5-7
NRU SERIES
LIQUID LEVEL CONTROL
PUMP UP
UL listed CSA recognized
• LED Relay Indicator
• Three Styles
• Pump Up Control
•4.7 kΩ to 100 kΩ Sensitivity
• 10 Amp SPDT Relay
SPECIFICATIONS:
Input Power . . . . . . . . . . . . . . .24, 48, 110, 220 VAC, ±15% (50/60 Hz)
Maximum voltage . . . . . . . . . . .24 VAC: 1.5 VA
48 VAC: 1.7 VA
110 VAC: 2 VA
220 VAC: 2 VA
Output . . . . . . . . . . . . . . . . . . .SPDT Relay
Contact material . . . . . . . . . . .AgCdO
Maximum loading . . . . . . . . . .10A AC resistive 8A DC resistive
Maximum switching voltage . .250 VAC 250 VDC
Maximum power rating . . . . . .2500 VA 80 W
Electrical life . . . . . . . . . . . . . .2 x 10
5
at 2200 VA resistive load
Mechanical life . . . . . . . . . . . . .3 x 10
7
operations
Probe isolation . . . . . . . . . . . . .Electrodes: 2000 VAC
Probe sensitivity . . . . . . . . . . .4.7 K to 100 K ohms
Probe voltage . . . . . . . . . . . . . .24 VAC, 60 Hz
Probe current . . . . . . . . . . . . . .2 mA max.
Operating temperature . . . . . .+14°F to +140°F -10°C to +60°C
Weight . . . . . . . . . . . . . . . . . . .7 oz. (200g)
Note: The cable for probes (max 300ft) should be run in separate conduit. A
shielded cable is recommended.
MOUNTING
D = DIN-rail mounting
L = 11 pin plug-in
P = 8 pin plug-in
SERIES
NRU
P
MOUNTING
NRU
SERIES
220D
INPUT POWER
INPUT POWER
24A = 24VAC
48A = 48VAC
110A = 110VAC
220A = 220VAC
WIRING DIAGRAM:
ORDERING INFORMATION:
Control of conductive liquids (tap water, sea water, sewage,
chemical solutions, coffee, ice cream, etc.)
The relay is energized when the level falls below the low level
probe. It de-energizes when the high level probe is reached.
The NRU will also control a single level. In this case, a single
probe is used and the relay operates when the probe is not
immersed. The Max terminal is connected to common with a
jumper.
In either case, a common electrode is needed if the container
is non-conductive.
11
12 14
C
R
1
2
3
4
5
6
7
8
9
10
11
1
2
3
45
6
7
8
DNRU
PNRU
LNRU
A1
A2
RR
SSS
Max C C Max
min Max
˜
˜
min min
R
S
LEVEL
Max
min
R
S
LEVEL
t0
