Syrelec, Brand of Crouzet Control NRU SERIES Data Sheet

CONTROLS CONTROLS

Products and specifications subject to change without notice.

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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 . . . . . . . . . . . . . .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.

S

Max

min

LEVEL

R

S

LEVEL

R

t0

PNRU

SSS

min min

7

8

9

10

3

2

45

1

8

6

7

˜

˜

DNRU

A1

12 14

LNRU

Max C C Max

min Max

11

C

R

A2

6

5

4

3

RR

2

1

11