Danfoss MBS 4201, MBS 4251, MBS 4701, MBS 4751 Data sheet

Data sheet

Intrinsically safe pressure transmitter
MBS 4201, MBS 4251, MBS 4701 and MBS 4751

The intrinsically safe pressure transmitter
program is designed for use in hazardous
environments and oers a reliable pressure
measurement, even in harsh applications with
severe medium inuences like cavitation, liquid
hammer or pressure peaks.

The MBS 4201 and MBS 4251 are Ex ia IIC T6...T4
explosion protected according to the ATEX
directive 94/9/EC whereas the MBS 4701 and
MBS 4751 are Ex ia IIC T4 explosion protected.
Both series come with 4 – 20 mA output signal,
absolute or gauge (relative) versions, measuring
ranges from 0 – 1 to 0 – 600 bar, zero point and
span adjustment, plug connection and a wide
range of pressure connections.

Excellent vibration stability, robust construction,
and a high degree of EMC/EMI protection equip
the pressure transmitter to meet the most
stringent industrial requirements.

Features y In compliance with ATEX directive 94/9/EC:

- Ex ia IIC T6...T4 (MBS 42xx series)

- Ex ia IIC T4 (MBS 47xx series)

y Applicable in potentially explosive

atmosphere:
Zone 0, Zone 1, Zone 2 (gases and vapour)

y Enslosure and wetted parts of acid-resistant

stainless steel (AISI 316L)

y Pressure ranges in relative (gauge) or absolute

from 0 up to 600 bar

y Output signal: 4 – 20 mA

Approvals

MBS 4201 and MBS 4251:

y Bureau Veritas, BV
y Det Norske Veritas, DNV

y Marine approved
y A wide range of pressure connections
y Temperature compensated and laser calibrated
y MBS 4251 and MBS 4751 with integrated pulse

snubber for protection against cavitation and
liquid hammering

y MBS 4701 and MBS 4751 zero and span

adjustment

y Lloyds Register of Shipping, LR
y American Bureau of Shipping ABS

(Expired September 2020)

AI244686442908en-000301 | 1© Danfoss | DCS (im) | 2020.10

Data sheet | Intrinsically safe pressure transmitter, MBS 4201, MBS 4251, MBS 4701 and MBS 4751

Application and media
conditions for MBS 4251 and
MBS 4751

Pulse-snubber

Ordering standard versions
MBS 4701

Plug: Pg 9 (EN 175301-803-A)
Output: 4 – 20 mA
Pressure connection: G ½ A (EN 837)

Application

Cavitation, liquid hammer and pressure peaks may
occur in hydraulic systems with changes in ow
velocity, e.g. fast closing of a valve or pump starts
and stops.

The problem may occur on the inlet and outlet
side, even at rather low operating pressures.

Media condition

Clogging of the nozzle may occour in liquids
containing particles. Mounting the transmitter in
an upright position minimizes the risk of clogging,
because the ow in the nozzle is restricted to the
start-up period when the dead volume behind the
nozzle orice is relatively big (0.3 mm). The media
viscosity has only little eect on the response time.
Even at a viscosities up to 100 cSt, the response time
will not exceed 4 ms.

Type no.

MBS 4701-1011-A1AB08 0 – 1 060G4303

MBS 4701-1211-A1AB08 0 – 1.6 060G4300

MBS 4701-1411-A1AB08 0 – 2.5 060G4304

MBS 4701-1611-A1AB08 0 – 4 060G4305

MBS 4701-1811-A1AB08 0 – 6 060G4306

MBS 4701-2011-A1AB08 0 – 10 060G4307

MBS 4701-2211-A1AB08 0 – 16 060G4301

MBS 4701-2411-A1AB08 0 – 25 060G4308

MBS 4701-2611-A1AB08 0 – 40 060G4309

MBS 4701-2811-A1AB08 0 – 60 060G4302

Measuring range

Pe 1) [bar]

Code number

MBS 4751
with pulse snubber

Type no.

MBS 4751-3211-A1AB08 0 – 160 060G4311

MBS 4751-3411-A1AB08 0 – 250 060G4312

MBS 4751-3611-A1AB08 0 – 400 060G4313

MBS 4751-3811-A1AB08 0 – 600 060G4314

1

) Relative / gauge

Measuring range

Pe 1) [bar]

Code number

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Data sheet | Intrinsically safe pressure transmitter, MBS 4201, MBS 4251, MBS 4701 and MBS 4751

Technical data

Performance (EN 60770)

Standard version

MBS type

MBS 4201 MBS 4251 MBS 4701 MBS 4751

–

with pulse

snubber

Accuracy (incl. non-linearity, hysteresis and repeatability) ± 1% FS ± 1% FS ± 0.5% FS ± 0.5% FS

Non-linearity BFSL (conformity) ≤ ± 0.2% FS

Hysteresis and repeatability ≤ ± 0.1% FS

Thermal error band (compensated temperature range) ≤ ± 1% FS

Response time

Liquids with viscosity < 100 cSt < 4 ms < 4 ms < 4 ms < 4 ms

Air and gases < 4 ms < 35 ms < 4 ms < 35 ms

Overload pressure (static) 6 × FS (max. 1500 bar)

Burst pressure > 6 × FS (max. 2000 bar)

Durability, P: 10 – 90% FS > 3 × 106 cycles

0 – 1 to 0 – 10 bar mearsuring range – – -5 – 20 % FS

Zero point adjustment

0 – 16 to 0 – 40 bar measuring range – – -5 – 10% FS

0 – 60 to 0 – 600 bar measuring range – – -2.5 – 2.5% FS

Span adjustment 0 – 1 to 0 – 600 bar measuring range – – -5 – 5% FS

With zero point and

span adjustment

–

with pulse

snubber

Electrical specications

Nom. output signal (short curcuit protected) 4 – 20 mA

Supply voltage, UB (polarity protected) 10 – 28 V DC

Supply voltage dependency ≤ ± 0.05% FS / 10 V

Current limitation (linear output signal up to 1.5 × rated range) 30 – 35 mA

UB - 10 V

Load [RL] (load connected to 0 V)

RL ≤

0.02 A

[Ω]

Environmental conditions

Sensor temperature range See page 6

Media temperature range

Ambient temperature range (depending on electrical connection) See page 6

Compensated temperature range 0 – 100 °C

Transport temperature range Plug version / cable version -50 – 100 °C / -30 – 80 °C

EMC - Emission EN 61000-6-3

Air mode 8 kV EN 61000-6-2

Contact mode 4 kV EN 61000-6-2

Field 10 V/m, 26 MHz – 1 GHz EN 61000-6-2

Conducted 10 V

, 150 kHz – 30 MHz EN 61000-6-2 1)

rms

Burst 4 kV (CM), Clamp EN 61000-6-2

Surge 1 kV (CM, DM) Rg = 42 Ω EN 61000-6-2

EMC Immunity

Electrostatic discharge

RF

Transient

Insulation resistance > 100 MΩ at 100 V

Vibration stability

Shock resistance

Sinusoidal 20 g, 25 Hz – 2 kHz IEC 60068-2-6

Random 7.5 g

, 5 Hz – 1 kHz IEC 60068-2-64

rms

Shock 500 g / 1ms IEC 60068-2-27

Free fall 1 m IEC 60068-2-32

Enclosure (depending on electrical connection) See page 6

1

) In the frequency range of 150 kHz – 3 MHz the error is > 1% FS

115 - (0.35 x ambient
temp.)

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Data sheet | Intrinsically safe pressure transmitter, MBS 4201, MBS 4251, MBS 4701 and MBS 4751

Technical data

(continued)

Mechanical characteristics

Materials

Net weight (depending on pressure connection) 0.2 – 0.3 kg

Wetted parts EN 10088-1; 1.4404 (AISI 316 L)

Enclosure EN 10088-1; 1.4404 (AISI 316 L)

Ordering special versions

Non-standard build-up
combinations may be selected.
However, minimum order
quantities may apply.

Please contact your local Danfoss
oce for further information.

MBS 4201
MBS 4251
MBS 4701
MBS 4751

Measuring range Pressure connection

0 – 1.0 bar
0 – 1.6 bar
0 – 2.5 bar
0 – 4.0 bar
0 – 6.0 bar
0 – 10 bar
0 – 16 bar
0 – 25 bar
0 – 40 bar
0 – 60 bar
0 – 100 bar
0 – 160 bar
0 – 250 bar
0 – 400 bar
0 – 600 bar

Pressure reference

Gauge (relative)
Absolute

1

) MBS 4201 and MBS 4251 only

1 0 A B 0 8
1 2 A C 0 4 ¼ – 18 NPT
1 4 A C 0 8 ½ – 18 NPT
1 6 G B 0 4 DIN 3852-E-G ¼; Gasket: DIN 3869-14 NBR
1 8 F A 0 8 ISO 6149-2, M14 × 1.5 – 6 g, O-ring NBR
2 0
2 2
2 4
2 6 A1
2 8 A3
3 0 C8
3 2
3 4
3 6
3 8 1

1 –

Electrical connection

Figures refer to plug and standard PIN conguration - see page 6

Plug Pg 9 (EN175301-803-A)
Screened cable, 2 m 1)
ISO 15170-A1-3.2-Sn, male 1)(Bayonet plug)

Output signal

4 – 20 mA

1
2

–

Gasket material

0

No gasket

1

Gasket, Viton -20 – 125°C

G ½ A (EN 837)

Prefered version

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Data sheet | Intrinsically safe pressure transmitter, MBS 4201, MBS 4251, MBS 4701 and MBS 4751

3

4

39.5

34

39.5

Dimensions/Combinations

Type code A1 A3 C8 A1

EN175301-803-A,

Pg 9

Non adjustable versions

MBS 4201, MBS 4251

2 m cable

ISO 15170-A1-3.2-Sn

(Bajonet plug)

Adjustable versions

MBS 4701, MBS 4751

EN175301-803-A,

Pg 9

DIN 3852-E-G ¼

Gasket:

DIN 3869-14-NBR

G ½ A

(EN 837)

¼ – 18 NPT ½ – 14 NPT

ISO 6149-2

M14 x 1.5 - 6g

Incl. O-ring NBR

Type code GB04 AB08 AC04 AC08 FA08

Recommended
torque 1)

1

) Depends of dierent parameters such as gasket material, mating material, thread lubrication and pressure level

30 – 35 Nm 30 – 35 Nm

2 – 3 turns after nger

tightened

2 – 3 turns after nger

tightened

30 – 35 Nm

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Data sheet | Intrinsically safe pressure transmitter, MBS 4201, MBS 4251, MBS 4701 and MBS 4751

Electrical connections

Type code page 5 A1 A3 C8

EN 175301-803-A, Cable versions ISO 15170-A1-3-2-Sn (bayonet plug)

Ambient temperature -40 – 85 °C -40 – 85 °C -40 – 85 °C

Material

Glass filled polyamid,

PA 6.6

PVC cable

Glass filled polyester,

PBT

Enclosure 1) IP65 IP67 IP67 / IP69K

Ex-certication - Conformity specifications

Ambient temperature

Ex ia IIC T4
Ex ia IIC T5
Ex ia IIC T6

-40 – 100 °C

-40 – 75 °C

-40 – 50 °C

-40 – 80 °C ²) / -5 – 70 °C ³)

-40 – 75 °C ²) / -5 – 70 °C ³)

-40 – 50 °C ²) / -5 – 70 °C ³)

-40 – 100 °C

-40 – 75 °C

-40 – 50 °C

Medium temperature

Ex ia IIC T4
Ex ia IIC T5
Ex ia IIC T6

Power supply Ui
Max. input current li
Max. input power Pi
Internal capacity Ci
Internal inductivity Li

Electrical connection,
4 – 20 mA output

Pin1: + supply
Pin 2: - supply
Pin 3: not used

-40 – 125 °C

-40 – 95 °C

-40 – 50 °C

28 V dc

100 mA

0.7 W

< 50 nF

< 8 μH

-40 – 125 °C

-40 – 95 °C

-40 – 50 °C

28 V dc

100 mA

0.7 W
< 50 nF incl. 0.2 nF / meter cable
< 8 μH incl. 0.8 μH / meter cable

Black 1: + supply
Black 2: - supply
Screen: not connected
to MBS enclosure

-40 – 125 °C

-40 – 95 °C

-40 – 50 °C

28 V dc

100 mA

0.7 W

< 50 nF

< 8 μH

Pin 1: + supply
Pin 2: - supply
Pin 3: ventilation
Pin 4: not used

(2 wire)

Earth: Connected
to MBS enclosure

1

) IP protection fullled together with mating connector

2

) Fixed installation

3

) Cables flexed during operation

© Danfoss | DCS (im) | 2020.106 | AI244686442908en-000301

Safety instructions

All national safety regulations must be complied with in connection with installation, start-up and operation of Danfoss pressure
transmitters type MBS 4201, MBS 4251, MBS 4701 and MBS 4751. Furthermore, the requirements of the Declaration of Conformity and
national regulations for installation in explosion areas apply. Disregarding such regulations involves a risk of serious personal injury or
extensive material damage. Work in connection with the pressure transmitters mentioned must be performed only by suitably qualied
persons.

Basic safety and health requirements are fullled through compliance with:

EN60079-0: 2012, IEC60079-0: 6th edition, EN60079-11: 2012, IEC60079-11: 6th edition, EN60079-26: 2007, IEC60079-26: 2nd edition.
Special Ex protection instructions: In the event of damage to enclosure or diaphragm, the pressure transmitter must be replaced.

The end user must ensure the installation is made in accordance to EN/IEC60079-25 and EN/IEC60079-14.
WARNING –Potential Electrostatic Charging Hazard. The transmitter must only be installed in surroundings with low wind speed, and

where rubbing on the plug is unlikely. Cleaning with a damp cloth is recommended. To avoid build -up of electrostatic discharge it must
be ensured the pressure connection of the pressure transmitter is having a reliable connection to earth with an impedance no exceeding
1 Gohm.
The MBS transmitters do not provide isolation meeting the dielectric strength requirements of IEC/EN60079-11.
MBS transmitters contain 10 nF capacitance from any input terminal to earth.

Special instruction when adjusting MBS 47xx series:
If possible only adjust the MBS in non -hazardous area or take precaution to avoid electrostatic discharge and ensure the earthing of the
transmitter housing is maintained. The transmitter must all ways be supplied from an intrinsic safety barrier.

Demands on the medium
Parts in contact with the medium are made of stainless steel, EN 1088-1 1.4404 (AISI 316L). The user is responsible for a careful analysis
of all process parameters when materials have to be specied and for ensuring the process medium is neutral to stainless steel as some
media can be corrosive.
The end user must ensure that the process connection is gas tight (as required by EN/IEC60079-26) which may require the use of a
suitable gasket/seal in combination with the process connection to obtain a gas-tight connection.
Gaskets and seals used at the pressure connection, including those supplied with the transmitters, must be determined as being suitable
for use with the process medium and process pressure/temperature before use and alternative gasket material chosen if necessary. The
end user must ensure the transmitter pressure connection is tightened with the correct torque as required for the specic thread type.

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