NNR Series

NNR Series
CONTROLS
CONTROLS
NNR
SERIES
LIQUID LEVEL CONTROL
PUMP UP OR DOWN
SWITCH SELECTABLE
UL listed
•
•
•
•
CSA recognized
10 Amp SPDT Rated
Sensitivity Adjustment 4.7 kΩ to 47 kΩ
One, Two or Three Probe Operation
24 VAC to 220 VAC Voltages
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.
S
Max
min
LEVEL
R
S
LEVEL
R
0
t
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
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 107 operations
Electrical life of relay . . . . . . . . . 2 x 105 at 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)
WIRING DIAGRAM:
AC
s
Pump Down (2)
Pump Up (1)
AC
DIMENSIONS:
3.62
(92)
Note: For best results use shielded cable with the probes and do not run probe
cables with other wires.
1.5
(38.1)
2.16
(55)
3
(76.2)
ORDERING INFORMATION:
MOUNTING
N = Open PC Board
Common
Max Min
N
NR
220A
MOUNTING
SERIES
INPUT POWER
SERIES
NR
Products and specifications subject to change without notice.
INPUT POWER
24A = 24 VAC
48A = 48 VAC
110A = 110 VAC
220A = 220 VAC
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
5-6
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