Fluidcontrol

Level- and temperature

sensor

Nivovent NV 77-XP

DA100203

02/2018

page 1 / 6

Buhler Technologies LLC, 1030 West Hamlin Road, Rochester Hills, MI 48309

Phone: 248.652.1546 / 49 89-0, Fax: 248.652.1598

e-mail: [email protected]

Internet: www.buhlertech.com

The oil tank is the key component of hydraulic and lubrication

systems. The operating oil is removed from the tank and then

returned to it. Depending on what the system is used for, the

levels in the oil tank can fluctuate to varying degrees. In most

applications, the level fluctuations result in an exchange of the

vapour phase above the oil level with the ambient air.

Therefore, virtually all oil tanks are equipped with a so-called air

breather, to prevent contaminants in the ambient air from

entering the system.

To reduce costs and space requirements, a number of other

system-related functions such as liquid level and temperature

monitoring are also combined in the air breather in the

Nivovent series.

NV 77-XP

Connecting flange as per DIN 24557 Part 2

Combined, continuous liquid level and oil temperature

monitoring

6 programmable switching outputs assignable as level or

temperature signal

Alternatively with IO-Link and 1 x programmable switching

output

Alternatively with one analog output each (current/voltage

setting) for level and temperature plus 2 or up to 6 freely

programmable switching outputs

In normal mode the LED display shows the actual

temperature, with status of the switching outputs

Standard menu structure based on VDMAstandard sheet

24574 ff.

Characteristics of switching outputs configurable as window

or hysteresis

Switching output configurable as frequency output

(1-100 Hz)

Min/max memory, logbook function

Proven and tested highly dynamic float system

Immersion tube in matched lengths to max. 1420 mm (55.9 in),

other lengths available upon request

Nivovent NV 77-XP

Technical Data NV 77-XP

Basic unit

Version MS VA

Operating pressure max. 1 bar (14.5 psi) max. 1 bar (14.5 psi)

Operating temperature -20 °C to +80 °C (-4 °F to 176 °F) -20 °C to +80 °C (-4 °F to 176 °F)

Float SK 604 SK 221

Min. fluid density 0.80 kg/dm³ (0,029 lb/in²) 0.85 kg/dm³ (0,029 lb/in²)

Lengths (all versions) 280 (11 in), 370 (14.6 in), 500 (19.7 in), 670 (26.4 in), 820 (32.3 in), 970 (38.2 in), 1120 (44.1

in), 1270 (50 in), and 1420 (55.9 in) mm (other lengths available upon request)

Material/Version

Display housing PA PA

Float rigid PU 1.4571

Immersion tube Brass 1.4571

Flange (DIN 24557) PA PA

Weight at L=280 mm

Each 100 mm add

approx. 850 g (1.873 lb)

approx. 30 g (0.066 lb)

approx. 950 g (2.094 lb)

approx. 50 g (0.110 lb)

Degree of protection IP65 IP65

Options

Stilling tube (SSR) Brass VA

Vent filter All versions HY type Hydac BF 7

Filter fineness 3 µm

Additional equipment Filler cap – n/a with filling adapter

Analysis Display Electronics

Display 4 character 7 segment LED

Operation Via 3 keys

Memory Min. / Max. Data memory

Starting current input approx. 100 mA for 100 ms

Current input during operation approx. 50 mA (without current- and switching outputs)

Supply voltage (U

) 10 – 30 V DC (nominal voltage 24 V DC) / with IO-Link 18 – 30 V DC

Ambient temperature -20 °C to +70°C (-4 °F to 158 °F)

Display units Level Temperature

%, cm, L, i, Gal °C / °F

Display range adjustable -20 °C to +120 °C (-4 °F to 248 °F)

Alarm setting range e.g. 0 – 100 % 0 °C to 100 °C (32 °F to 212 °F)

Display accuracy ± 1 % from end value ± 1 % from end value

Input values Level Temperature

Principle of measurement Reed-contact Pt100 Cl. B, DIN EN 60751

Resolution 5 mm (0.197 in) Tolerance ± 0.8 °C (1.44 °F)

2 Buhler Technologies LLC We reserve the right to amend specification. DA100203 ◦ 02/2018

Nivovent NV 77-XP

Optional switching outputs

1D1S 4S 6S

Plug (base) 1 x M12 – 4-pin 2 x M12 – 4-pin 1 x M12 – 8-pin

Switching outputs

IO-Link and 1 x freely program-

mable with level or tempera-

ture assignment options

4 x freely programmable with as-

signment options, e.g. 2xlevel/

2xtemperature*

6 x freely programmable with as-

signment options, e.g. 4 x level/ 2

x temperature*

Alarm memory with 1 x assignable to alarm

logbook

with 1 x assignable to alarm

logbook

with 1 x assignable to alarm

logbook

max. switching current** 0.5 A per output

continuous short-circuit

protected

0.5 A per output

continuous short-circuit

protected

0.5 A per output

continuous short-circuit

protected

Contact load max. 1 A total max. 1 A total max. 1 A total

*also programmable as frequency output

**Output 1 max. 0.2 A.

2S-KN-KT 4S-KN-KT 6S-KN-KT

Plug (base) 2 x M12 – 4-pin 1 x M12 – 8-pin 2 x M12 – 4-pin / 8-pin

Switching outputs

2 x freely programmable with

level or temperature assign-

ment options

4 x freely programmable with

level or temperature assignment

options

6 x freely programmable with

level or temperature assignment

options

Alarm memory with 1 x assignable to alarm

logbook

with 1 x assignable to alarm

logbook

with 1 x assignable to alarm

logbook

max. switching current* 0.5 A per output

continuous short-circuit

protected

0.5 A per output

continuous short-circuit

protected

0.5 A per output

continuous short-circuit

protected

Contact load max. 1 A total max. 1 A total max. 1 A total

Analogue outputs

1x level

1x temperature

1x level

1x temperature

1x level

1x temperature

Programmable as 4 – 20 mA,

2 - 10 V, 0 - 10 V, 0 - 5 V

4 – 20 mA,

2 - 10 V, 0 - 10 V, 0 - 5 V

4 – 20 mA,

2 - 10 V, 0 - 10 V, 0 - 5 V

Max. burden Ω as current

output

– 8 V) / 0.02 A (U

– 8 V) / 0.02 A

Min. input load as voltage

output

10 kΩ 10 kΩ 10 kΩ

**Output 1 max. 0.2 A.

Other output cards available upon request.

3Buhler Technologies LLCWe reserve the right to amend specification.DA100203 ◦ 02/2018

Nivovent NV 77-XP

Dimensions NV 77-XP

Basic version With options

Rubberised cork seal

NBR

seal

81 (3.2")65 (2.6")

30 (1.2")

L1 = min. 25 (1")

L2 = L - x

Analogue max.

Analogue min.

3.5 (0.1")

Display and

control unit

4 (0.2")

Ø90 (3.5")

Contamination indicator

BFA

Filling adapter

SSR

Stilling tube with

centring disc and

filling adapter

GI cork seal

Analogue max.

Analogue min.

21 (0.8")

35 (1.4")

23 (0.9")

50 (2")

65 (2.6")

NBR

seal

4 (0.2")

3.5 (0.1")

5 (0.2")

L2 = L - x

L1 = min. 50 (2")

NBR

seal

Flange drawing SK 604 float for

NV 77-XP-MS

SK 221 float for

NV 77-XP-VA

Ø61 (2.4")

6x Ø6 (0.2")

Ø73 (2.9")

Ø90 (3.5")

Analogue min.

L2 = L - x

x = 35 (1.4")

Ø44 (1.7")

Analogue min.

L2 = L - x

x = 55 (2.2")

Ø51 (2")

4 Buhler Technologies LLC We reserve the right to amend specification. DA100203 ◦ 02/2018

Nivovent NV 77-XP

Ordering Instructions NV 77-XP

Options / Accessories

Visual air breather

clogging indicator

: Analogue underpressure indicator, display range 0.35 bar (5.1 psi).

BFA* Filling adapter

incl. ribbed flange ribbed flange with sieve insert: This option allows adding small oil quantities via

the air breather housing. The corresponding housing is therefore equipped with that version.

SSR* Stilling tube

with support ring and filling adapter: This includes the optional stilling tube as well as the same filling

option as the BFA. The stilling tube is made of the same material as the requested immersion tube (MS/VS).

For integration in

Multiterminal

: The basic unit will be mounted to the Multiterminal (MT). For specification please

refer to the Multiterminal data sheet.

MTS

For integration in

Multiterminal including stilling tube

: In addition to the basic unit, a stilling tube with centring

rod is installed in the Multiterminal.

FCT Fluid control terminal

: Here the fluid control terminal (FCT) mounts directly onto the basic version. For details please

refer to the fluid control terminal data sheet.

* not available in conjunction with FCT and MT/MTS option.

Model key

NV 77-XP-HY-5-

= 5 mm (0.2")

Resolution

2M12 - 4-pin

M12 - 8-pin

2M12 - 1 x 4-pin, 1 x 8-pin

Brass

float and VA immersion tube

Version

280 (11")

370 (14.6")

500 (19.7")

670 (26.4")

820 (32.3")

970 (38.2")

1120 (44.1")

1270 (50")

1420 (55.9")

4 x PNP switching output

Output card

2S-KN-KT

2 x PNP switching output

1 x analogue level output

1 x analogue temperature output

6 x PNP switching output

1 x analogue level output

1 x analogue temperature output

6S-KN-KT

Options

Contamination indicator

BFA

SSR

FCT

MTS

Filling adapter

Stilling tube with

filling adapter

Fluidcontrolterminal

for multiterminal

for multitermminal incl.

stilling tube

Not in conjunction with FCT option

4S-KN-KT version only

6S-KN-KT version only

Not in conjunction with FCT, MT or MTS option

Type designation with display,

control unit, HY filter

Plug connection*

Length (max. 1420 mm/55.9")

4 x PNP switching output

1 x analogue level output

1 x analogue temperature output

4S-KN-KT

6 x PNP switching output

* Other plug connections available upon request

- - -

1 x IO-Link

1 x PNP switching output

1D1S

Accessories

Item no. 4-pin Item no. 8-pin Description

9144 05 0010 9144 05 0048 Connecting cable M12x1, 1.5 m (4,92 ft), angular coupling and straight plug

9144 05 0046 9144 05 0049 Connecting cable M12x1, 3.0 m (9,84 ft), angular coupling and straight plug

9144 05 0047 9144 05 0033 Connecting cable M12x1, 5.0 m (16,40 ft), angular coupling and strands

Ordering example

You require: Level and temperature measurement with 5 mm (0.2") resolution, MS version, 2xM12 connector, L=670 mm

(26.4"), clogging indicator, display and control unit with 2 PNP switching points and analogue output for level

and temperature.

Order: NV 77-XP-HY-5-MS-2M12 / 670-2S-KN-KT-VS

5Buhler Technologies LLCWe reserve the right to amend specification.DA100203 ◦ 02/2018

Nivovent NV 77-XP

Standard pin assignment NV 77-XP

Plug connection

S6 M12 (EBS) 2 x M12 (EBS)

(galvanically isolated)

Dimensions

83 (3.2")

47 (1.9")

(3")

51 (2")

70 (2.8")

Number of pins 6-pin + PE 8-pin 4-pin / 4-pin

4-pin / 8-pin

DIN EN 175201-804 61076-2-101 61076-2-101

Voltage max. 30 V AC / V DC 30 V DC 30 V DC

Contact load max. 0.5 A per output 0.5 A per output 0.5 A per output

total max. 1 A 1 A 1 A

Cable fitting M20x1.5

Version 1D1S 4S 6S 2S-KN-KT 4S-KN-KT 6S-KN-KT

Plug M12 4-pin 2x M12 4-pin M12 8-pin 2xM12 4-pin M12 8-pin 2x M12 4-pin/8-pin

Connection

schematic

Plug A Plug B Plug A Plug B Plug A Plug B

1 +24 V DC +24 V DC +24 V DC +24 V DC +24 V DC +24 V DC +24 V DC +24 V DC +24 V DC

2 S2 (PNP) S2 (PNP) S4 (PNP) S2 (PNP)

Temp

(analogue)

S2 (PNP) S2 (PNP)

Temp

(analogue)

S2 (PNP)

3 GND GND GND GND GND GND GND GND GND

C/Q

(IO-Link)

S1 (PNP) S3 (PNP) S1 (PNP)

Level

(analogue)

S1 (PNP) S1 (PNP)

Level

(analogue)

S1 (PNP)

5 S3 (PNP) S3 (PNP) S3 (PNP)

6 S4 (PNP) S4 (PNP) S4 (PNP)

7 S5 (PNP) Level

(analogue)

S5 (PNP)

8 S6 (PNP)

Temp

(analogue)

S6 (PNP)

Plug S6 S6

Connection schematic

1 +24 V DC +24 V DC

2 GND GND

3 S1 (PNP) Level (analogue)

4 S2 (PNP) Temp (analogue)

5 S3 (PNP) S1 (PNP)

6 S4 (PNP) S2 (PNP)

6 Buhler Technologies LLC We reserve the right to amend specification. DA100203 ◦ 02/2018