CONTROLS CONTROLS
2
NNR SERIES
LIQUID LEVEL CONTROL
PUMP UP OR DOWN
SWITCH SELECTABLE
UL listed CSA recognized
•10 Amp SPDT Rated
•Sensitivity Adjustment 4.7 kΩto 47 kΩ
•One, Two or Three Probe Operation
•24 VAC to 220 VAC Voltages
SPECIFICATIONS:
Input . . . . . . . . . . . . . . . . . . . . . . 24, 48, 110, 220 VAC
±15% (50/60 Hz)
Maximum power consumption . . 24 VAC: 1.5 VA
48 VAC: 1.7 VA
110 VAC: 2 VA
220 VAC: 2 VA
Output . . . . . . . . . . . . . . . . . . . . . SPDT relay
Contact material . . . . . . . . . . . . . AgCdO (90/10)
Maximum loading . . . . . . . . . . . . 10 A AC resistive 1A DC inductive
Maximum switching voltage . . . . 250 VAC 30 VDC
Relay maximum power rating . . . 2500 VA 30 VDC
Mechanical life of relay . . . . . . . . 3 x 107operations
Electrical life of relay . . . . . . . . . 2 x 105at 2200 VA resistive load
Probe isolation . . . . . . . . . . . . . . . Switching contact: 2000 VA
Electrodes: 2000 VAC
Probe sensitivity . . . . . . . . . . . . . 4.7 K ohm to 47 K ohm
Probe voltage . . . . . . . . . . . . . . . 24 VAC, 60 Hz
Probe current . . . . . . . . . . . . . . . 2 mA max.
Operating temperature . . . . . . . . +14°F to 140°F -10°C to +60°C
Weight . . . . . . . . . . . . . . . . . . . . . 4.6 oz. (130g)
Note: For best results use shielded cable with the probes and do not run probe
cables with other wires.
WIRING DIAGRAM:
A- Pump down function: the output relay energizes when the liquid level
reaches the high or max. probe. It remains energized until the level is
below the low or min probe. The relay will remain de-energized until the
high level is again reached. This control may also be used with only two
probes by connecting the maximum and common terminals together.
The output is energized when the low probe is in contact with the liquid.
B - Pump up function: when power is supplied to the unit, the output
relay is energized. When the level reaches the high probe the relay is
de-energized. The relay is energized again when the level falls below
the lob probe. The control may also be used with only two probes by
connecting the maximum and common terminals together. The output is
de-energized when the level reaches the low probe.
In both functions, If the container is conductive, It may be used as the
common probe in some applications
Pump Down (2)
Pump Up (1)
s
AC
AC
MinMax Common
DIMENSIONS:
3
(76.2)
3.62
(92)
1.5
(38.1)
2.16
(55)
R
S
LEVEL
Max
min
R
S
LEVEL
t0
MOUNTING
N= Open PC Board
SERIES
NR
N
MOUNTING
NR
SERIES
220A
INPUT POWER
INPUT POWER
24A = 24 VAC
48A = 48 VAC
110A = 110 VAC
220A = 220 VAC
ORDERING INFORMATION:
Products and specifications subject to change without notice.
Order/Technical Support – Tel: (800) 677-5311 / FAX: (800) 677-3865 / www.crouzet-usa.com
2/73
CONTROLS CONTROLS
Products and specifications subject to change without notice.
Order/Technical Support – Tel: (800) 677-5311 / FAX: (800) 677-3865 / www.crouzet-usa.com
2/74
NRU SERIES
LIQUID LEVEL CONTROL
PUMP UP
UL listed CSA recognized
•LED Relay Indicator
•Three Styles
•Pump Up Control
•4.7 kΩto 100 kΩSensitivity
•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 80 VDC
Maximum power rating . . . . . .2500 VA 80 W
Electrical life . . . . . . . . . . . . . .2 x 105at 2200 VA resistive load
Mechanical life . . . . . . . . . . . . .3 x 107operations
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
567
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
CONTROLS CONTROLS
Products and specifications subject to change without notice.
Order/Technical Support – Tel: (800) 677-5311 / FAX: (800) 677-3865 / www.crouzet-usa.com
2/75
2
NR SERIES
LIQUID LEVEL CONTROL
PUMP DOWN
UL listed CSA recognized
•24 VAC to 220 VAC Operating Voltages
•4.7 kΩto 100 kΩSensitivity
•LED Relay Indicator
•10 Amp SPDT Relay
SPECIFICATIONS:
Input . . . . . . . . . . . . . . . . . . . . . . . . 24, 48, 110, 220 VAC ±15% (50/60 Hz)
Maximum power consumption . . . 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 inductive
Maximum switching voltage . . . . . 250 VAC 250 VDC
Relay maximum power rating . . . . 2500 VA 80 W
Mechanical life of relay . . . . . . . . . 3 x 107operations
Electrical life of relay . . . . . . . . . . . 2 x 105at 2200 VA resistive load
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 . . . . . . . . . . . . . . . . . . . . . . 4.6 oz. (130g)
MOUNTING
D= DIN-rail or panel mounting
L= 11 pin plug-in
P= 8 pin plug-in
SERIES
NR
P
MOUNTING
NR
SERIES
110A
INPUT POWER
INPUT POWER
24A = 24 VAC
48A = 48 VAC
110A = 110 VAC
220A = 220 VAC
WIRING DIAGRAM:
ORDERING INFORMATION:
The output relay energizes when the liquid level reaches the high
probe. The relay de-energizes when the liquid falls below the low
probe. This control can also be used with only two probes by con-
necting the maximum and common terminals together. The output is
energized when the level reaches the low probe. In both functions,
if the container is conductive, it may be used as the common probe
in some applications.
11
12 14
C
R
1
2
3
4
567
8
9
10
11 1
2
3
45
6
7
8
A1
A2
RR
SSS
Max C C Max
min Max
˜
˜
min min
R
S
LEVEL
Max
min
R
S
LEVEL
t0
DNR LNR PNR
CONTROLS CONTROLS
Products and specifications subject to change without notice.
Order/Technical Support – Tel: (800) 677-5311 / FAX: (800) 677-3865 / www.crouzet-usa.com
2/77
2
NRT SERIES
LIQUID LEVEL CONTROL
CONSTANT LEVEL
PUMP UP
UL listed CSA recognized
•100 kΩSensitivity
•10 Amp SPDT Relay
•Maintain Constant Level
•Four Mounting Options
SPECIFICATIONS:
Input . . . . . . . . . . . . . . . . . . . . . . . . 24 VAC, 48 VAC, 110 VAC
220 VAC, ± 15%, 50/60 Hz
Maximum power consumption . . . 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 . . . . . . . . . . . . . 10 A AC resistive 8 A Dc resistive
Maximum switching voltage . . . . . 250 VAC 250 VDC
Relay maximum power rating . . . . 2500 VA 80 W
Mechanical life of relay . . . . . . . . . 3 x 107operations
Electrical life of relay . . . . . . . . . . . 2 x 105at 2200 VA resistive load
Probe isolation . . . . . . . . . . . . . . . Switching contact 2000 VAC
Electrodes: 2000 VAC
Probe sensitivity . . . . . . . . . . . . . . 100 kΩ
Probe voltage . . . . . . . . . . . . . . . . 24 VAC, 60 Hz
Probe current . . . . . . . . . . . . . . . . . 1 mA max.
Operating temperature . . . . . . . . . +14°F to +140°F -10°C to +60°C
Weight . . . . . . . . . . . . . . . . . . . . . . 7 oz. (200g)
Note: The probe cables (max. 300ft) need not be shielded; however, it is
not advisable to run the probe cables with power cables. If shielded cable
is used, the shield and common should be connected.
MOUNTING
D= DIN-rail or panel mounting
L= 11 pin plug-in
P= 8 pin plug-in
N= open PC board
SERIES
NRT = Enclosed
NNRT = Open PC board version mounting
dimensions same as NNR
P
MOUNTING
NRT
SERIES
110A
INPUT POWER
INPUT POWER
24A = 24 VAC
48A = 48 VAC
110A = 110 VAC
220A = 220 VAC
WIRING DIAGRAM:
ORDERING INFORMATION:
The NRT series is applied for maintaining a constant level of
conductive liquid. When the liquid decreases below the probe,
the relay is energized after a 4 second time delay to avoid wave
disturbances. The relay de-energizes when the liquid reaches
the probe. A common electrode is needed if the container is
non-conductive.
s
0 t
R
Level
TT
0.3 s
11
12 14
C
R
1
2
3
4
567
8
9
10
11 1
2
3
45
6
7
8
DNRT PNRTLNRT
A1
A2
RR
SSS
Max C C Max
min
˜
˜
max
Mouser Electronics
Authorized Distributor
Click to View Pricing, Inventory, Delivery & Lifecycle Information:
Crouzet:
LNR110A LNR24A PNR220A DNR220A DNR110A LNRU220A LNRT110A LNR220A DNRT24A DNR24A
PNRT24A LNR2110A DNRU24A PNRT220A LNRT24A PNR24A LNRTA110A LNRT220A LNRTA24A
DNRT220A LNRU24A LNRTA220A PNRTSP115110A
