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

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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

80 VDC

Maximum power rating

. . . . . .2500 VA

80 W

Electrical life

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

S

S

S

Max C

C

Max

min

Max

˜

˜

min

min

R

S

LEVEL

Max

min

R

S

LEVEL

t

0