Crouzet 84870700, 84870710 Data Sheet

Level control

HNM HNE

Part numbers

Product adaptations

Accessories

General characteristics

➜ Level control relay - 35 mm

■ Control of one or two levels

■ Filling or emptying function

■ HNM: Control by a resistive level probe

■ HNE: Control by a discrete sensor

Sensing By resistive probes By discrete sensors
Nominal voltage (V)

Part numbers 84870700 84870710

HNM HNE

➞ 240 V

z

24 ➞ 240 V

24

z

■ Customisable colours and labels

■ Fixed or adjustable time delay

Adaptation dedicated to HNM:

■ Fixed threshold in the generic measurement range

Description Code

Removable sealable cover for 35 mm casing 84800001

HNM HNE

Supply

Power consumption at Un
Immunity from micro power cuts (ms)

Output

Type of output 1 double changeover

Timing

Maximum reset time 4 s 1.7 s

Inputs and measuring cicuit

Measurement range 250 Ω ➞ 1 MΩ -
Low sensitivity adjustment gamme LS 250 Ω
Standard sensitivity adjustment gamme St 5 kΩ
High sensitivity adjustment gamme HS 50 kΩ
Adjustment of sensitivity 5

Display precision ± 10% of full scale for LS

Measuring error with temperature drift 0.5% / °C in standard

Measuring error with voltage drift 0%/V across the whole

Max. voltage at probe terminals 5 V / 500 Hz ± 10% 12 V
Max. current via probes < 1 mA 40 mA
Max. length of probe cables 100 m ­Max. capacity of probe cable (nF) 1 nF for HS range

Input circuit 3-wire sensors No

General characteristics

Weight 115 g 110 g

a

5 VA in
90 max. in

max. en

relay

➞ 100% of the selected

range

and St ranges

-40% / +10% of full scale
for HS ran ge

sensitivity

range

2.2 nF for St range

4.7 nF for LS range

/1.5 W in

a

c

➞ 5 kΩ -

➞ 100 kΩ -

➞ 1 MΩ -

c

et 100

5 VA in a/2.7 W in
50

1 single pole changeover
relay

-

±10% of full scale

0.5% / °C in standard
sensitivity

0%/V across the whole
range

✓

c

50

www.crouzet.com

General characteristics

HNM / HNE

Supply

Supply voltage Un

24 V
Voltage supply tolerance -15% / +10%
Operating range

20.4

Polarity with DC voltage No

a

supply voltage frequency

Galvanic isolation of power supply/measurement

50/60 Hz ± 10%

✓

Timing

Delay on threshold crossing 0.1

➞ 5 s (0, + 10%)

Repetition accuracy with constant parameters ± 2%
Delay on pick-up 600 ms

Output

Type of contacts No cadmium
Maximum breaking voltage

Max. breaking current
Min. breaking current
Electrical life (number of operations)
Breaking capacity (resistive)

250 V

z

5 A

10 mA / 5 V

1 x 10

1 250 VA
Maximum rate 360 operations/hour at full load
Operating categories acc. to IEC 60947-5-1 AC12, AC 13, AC 14, AC 15, DC 12, DC 13
Mechanical life (operations)

30 x 10

Insulation

Nominal insulation voltage IEC 60664-1 250 V
Insulation coordination (IEC 60664-1 / 60255-5) Overvoltage category III: degree of pollution 3
Rated impulse withstand voltage IEC 60664-1/60255-5 4 KV (1.2 / 50 µs)
Dielectric strength IEC 60664-1/60255-5 2 KV AC 50 Hz 1 min.
Insulation resistance IEC 60664-1 / 60255-5

> 500 MΩ / 500 V

General characteristics

Display power supply Green LED
Display relay Yellow LED
Delay Yellow LED
Casing 35 mm
Mounting On 35 mm symmetrical DIN rail, IEC/EN 60715
Mounting position All positions
Material: enclosure plastic type VO to UL94 standard Incandescent wire test according to IEC 60695-2-11 & NF EN 60695-2-11
Protection (IEC 60529) Terminal block: IP20

Connecting capacity IEC 60947-1

Max. tightening torques IEC 60947-1 0.6
Operating temperature IEC 60068-2 -20
Storage temperature IEC 60068-2 -40

Casing: IP30

Rigid: 1 x 4

1 x 11 AWG - 2 x 14 AWG

Flexible with ferrules: 1 x 2.5

1 x 14 AWG - 2 x 16 AWG

➞ 1 Nm / 5.3 ➞ 8.8 Lbf.In
➞ +50°C
➞ +70°C

Humidity IEC 60068-2-30 2 x 24 hr cycle 95% RH max. without condensation 55°C
Vibrations according to IEC/EN60068-2-6 10

➞ 150 Hz, A = 0.035 mm

Shocks IEC 60068-2-6 5 g

Standards

Marking CE (LVD) 73/23/EEC - EMC 89/336/EEC
Product standard NF EN 60255-6 / IEC 60255-6 / UL 508 / CSA C22.2 N°14
Electromagnetic compatibility Immunity EN 61000-6-2/IEC 61000-6-2

Certifications UL, CSA, GL

Emission EN 61000-6-4 2002/EN 61000-6-3

IEC 61000-6-4/IEC 61000-6-3

Emission EN 55022 class A

pending
Conformity with environmental directives RoHS, WEEE

➞ 240 V

➞ 264 V

z

5

a

6

2

z

z

c

c

- 2 x 2.52 mm2

2

- 2 x 1.52 mm

2

51

HNM-HNE

Level control

Principles

U

1

2

3

4

Overview

HNM and HNE control relays are designed to monitor the levels of:

- Conductive liquid (HNM)

- Any other product (HNE)
The HNM relay takes its measurements by means of resistive probes.
The HNE relay takes its measurements by means of discrete sensors.
Both these products actuate their output relay during emptying or filling of a tank.

General principle:

HNM relays control levels of conductive liquids. The principle is based on measuring the apparent resistance of the liquid between two submerged
probes. When this value is below the preset threshold displayed on the front face of the unit, the relay changes state. To avoid electrolytic phenomena, an
AC current runs across the probes. A rotary switch on the front face can be used to select the desired function and sensitivity range.

HNE relays control levels of products which may or may not be conductive. High and low-level data is produced by 3-wire output discrete sensors.

A green LED indicates the presence of the supply voltage.
A yellow LED indicates the status of the output relay.
A yellow LED flashes during the time delay.

Parameter setting:

A rotary switch on the front face can be used to select the sensitivity range, and the emptying or filling function.
A second switch can be used to select the number of levels (1 or 2), as well as the type of time delay in the case of 1-level mode.
The configuration of these switches is taken into account on energisation.
If the switch is set to a non-conforming position on energisation, the product goes into fault mode, the output relay stays open and the LEDs flash to signal
the position error.
If the switch position changes while the unit is operating, all the LEDs flash but the product continues to work normally with the function selected on
energisation prior to the change of position.
The LEDs return to their normal state if the switch is reset to its initial position defined before the last energisation.

HNM-HNE - Emptying/filling function - two levels

Control of two levels, emptying function

(Level: 2, LS emptying function (Low sensitivity: 250Ω to 5 kΩ ), St emptying (Standard
sensitivity: 5 kΩ to 100 kΩ ), HS emptying (High sensitivity: 50 kΩ to 1 MΩ ).
As long as the liquid level has not reached the probe maximum, the output relay stays open.
Once the max. level is reached, the contact closes, thus allowing the tank to empty (valve opens,
pump starts, etc). When the level drops below the min. level, the contact opens to interrupt the
emptying process.

NB: In two-level control mode the time delay for preventing wave effect is not active.

Control of two levels, filling function

Maximum level

B

Minimum level

C

Output relay R filling function "Up"

D

Output relay R emptying function "Down"

E

(Level: 2, LS filling function (Low sensitivity: 250Ω to 5 kΩ ), St filling (Standard sensitivity: 5 kΩ
to 100 kΩ ), HS filling (High sensitivity: 50 kΩ to 1 MΩ ).
As long as the liquid level has not reached the probe maximum, the output relay stays closed.
Once the max. level is reached, the contact opens and pumping stops. When the level drops
below the min. level, the contact closes again and pumping restarts so as to make the liquid level
rise again.

NB: In two-level control mode the time delay for preventing wave effect is not active.

HNM-HNE - One-level filling function/on-delay

U

1

2

Min. probe level

B

R output relay

C

HNM-HNE - One-level filling function/off-delay

U

1

2

Min. probe level sonde Min

B

R output relay

C

52

Tt Tt Tt Tt

Tt

Tt

Tt

One-level control (min. probe), filling function, on-delay

(Level: 1 - on-delay, LS filling function (Low sensitivity: 250Ω to 5 kΩ ), St filling (Standard
sensitivity: 5 kΩ to 100 kΩ ), HS filling (High sensitivity: 50 kΩ to 1 MΩ ).

When the liquid level drops below the probe for a duration longer than the value of time delay Tt
set on the front face, the relay closes and stays closed until the liquid level reaches the probe
again.
If the liquid level rises back above the level set before the end of the time delay, the relay does
not close.

One-level control (min. probe), filling function, off-delay

(Level: 1 - off-delay, LS filling function (Low sensitivity: 250Ω to 5 kΩ ) or St filling (Standard
sensitivity: 5 kΩ to 100 kΩ ) or HS filling (High sensitivity: 50 kΩ to 1 MΩ ).
When the liquid level drops below the probe for a duration longer than the value of time delay Tt
set on the front face, the relay closes instantly and stays closed until the liquid level reaches the
probe again and stays above it for a duration longer than time delay Tt set on the front face.

Tt

If the liquid level drops back below the level set before the end of the time delay, the relay stays
closed.

Principles

HNM-HNE - One-level emptying function/on-delay

U

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One-level control (min. probe), emptying function, on-delay

(Level: 1 - on-delay, LS emptying function (Low sensitivity: 250Ω to 5 kWΩ ), St emptying
(Standard sensitivity: 5 kΩ to 100 kΩ ), HS emptying (High sensitivity: 50 kΩ to 1 MΩ ).

1

Tt Tt Tt Tt

2

Min. probe level

B

R output relay

C

HNM-HNE - One-level emptying function/off-delay

U

1

Tt

Tt

Tt

Tt

2

Min. probe level

B

R output relay

C

Dimensions (mm)

HNM-HNE

60

44

23,2

3,5

When the liquid level rises above the probe for a duration longer than the value of time delay Tt
set on the front face, the relay closes and stays closed until the liquid level drops back below the
probe.
If the liquid level drops back below the level set before the end of the time delay, the relay does
not close.

One-level control (min. probe), emptying function, off-delay

(Level: 1 - off-delay, LS emptying function (Low sensitivity: 250Ω to 5 kΩ ), St emptying
(Standard sensitivity: 5 kΩ to 100 kΩ ), HS emptying (High sensitivity: 50 kΩ to 1 MΩ ).

When the liquid level rises above the probe, the relay closes instantly and stays closed until the
liquid level drops back below the probe for a duration longer than the value of time delay Tt set on
the front face.
If the liquid level rises back above the level set before the end of the time delay, the relay stays
closed.

35

67,5

45

90

2,6

5,5

Connections

HNM HNE

L1

L2

L3

N

S

F1

1

l ≤ 100 m (3937 in)

V1

U1

W1

M1
3

1 A fast-blow fuse or cut-out

B

Common

C

NB:
Probe cable: screened cable recommended, screening and "common"
connected to earth.
The probe cable does not have to be screened, but it is inadvisable to
mount it close to the power cables.
For mono level, use the "com" and "min." electrodes.

A1 A2 CMin Max

11

A1

A2

12

14

1112 14

22 21 24

Max

21

Min

24

22

2

L1

L2

L3

N

A1 A2

A1

A2

l ≤ 100 m (3937 in)

0VMin Max12V 12V

11

12

14

1112 14

Tor

Tor

Max

Min

S

V1

U1

W1

M1
3

1 A fast-blow fuse or cut-out

B

F1

1

NB:
Probe cable: screened cable recommended, screening and "common"
connected to earth.
The probe cable does not have to be screened, but it is inadvisable to
mount it close to the power cables.
For mono level, use the "com" and "min." electrodes.

53