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

) Relative / gauge

Measuring range

Pe 1) [bar]

Code number

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

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

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

115 - (0.35 x ambient temp.)

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