Danfoss MBS 4201, MBS 4251 Pressure Transmitters - Installation Guide
This guide provides essential information for the installation, operation, and safety of Danfoss MBS 4201 and MBS 4251 pressure transmitters, designed for use in potentially explosive areas.
Description and Application
Application: Pressure measurement in potentially explosive areas.
Approval: Ex ia IIC T5...T4 (MBS 42xx series) in accordance with ATEX directive 2014/34/EU.
Function: Pressure transmitters type MBS 4201, MBS 4251 convert the measured pressure to a 4-20 mA current signal.
Diagram Description: The transmitter is shown in three views, highlighting its compact design and connection ports. It features a pressure connection at the bottom and an electrical connector at the top.
Specifications
General Specifications
- Output current: 4-20 mA
- Supply voltage: 10-28 V
Safety Specifications (Electrical)
| Parameter | Value |
|---|---|
| Max. supply voltage (Ui) | 28 V |
| Max. Input current (Ii) | 100 mA |
| Max. Input power (Pi) | 0.7 W |
| Internal capacity (Ci) | 62 nF |
| Internal inductance (Li) | 8 μH |
Temperature Specifications (Plug Type)
Plug Type, MBS42x1-xxxx-Yxxxx (Y=A0, A1, A6, G9):
| Parameter | Temperature Class | |
|---|---|---|
| T4 | T5 | |
| Ambient temperature | -40 to 100 °C | -40 to 75 °C |
| Media temperature | -40 to 100 °C | -40 to 75 °C |
Temperature Specifications (Fixed Cable Types)
Fixed Cable Types, MBS42x1-xxxx-Yxxxx (Y = DB, DC, J1, DF, DH):
| Parameter | DB, DC, J1 PVC cable | DH, DF ETFE cable | ||
|---|---|---|---|---|
| T4 | T5 | T4 | T5 | |
| Ambient temperature (fixed installations) | -40 to 80 °C | -40 to 75 °C | -40 to 95 °C | -40 to 75 °C |
| Ambient temperature (cables flexed during installation or operation) | -5 to 70 °C | -5 to 70 °C | -5 to 70 °C | -5 to 70 °C |
| Media temperature | -40 to 100 °C | -40 to 75 °C | -40 to 100 °C | -40 to 75 °C |
Pressure Specifications
| Measuring range (bar) | Overload (Static) (bar) | Burst pressure (bar) |
|---|---|---|
| 0-1 | 6 | 100 |
| 0-1.6 | 12 | 100 |
| 0-2.5 | 24 | 100 |
| 0-4 | 24 | 100 |
| 0-6 | 60 | 100 |
| 0-10 | 60 | 100 |
| 0-16 | 150 | 150 |
| 0-25 | 150 | 150 |
| 0-40 | 300 | 400 |
| 0-60 | 360 | 800 |
| 0-100 | 600 | 1200 |
| 0-160 | 1200 | 1200 |
| 0-250 | 1500 | 2000 |
| 0-400 | 1500 | 2000 |
| 0-600 | 1500 | 2000 |
Safety Instructions
⚠️ General Safety: The transmitter must always be supplied from an intrinsic safety barrier. All national safety regulations must be complied with during installation, start-up, and operation. Disregarding these regulations may lead to serious personal injury or extensive material damage. Work must be performed only by suitably qualified persons.
Ex Requirements: Certificates include DEMKO 01 ATEX 127938X, IECEx ULD 12.00005X, UKEX UL22UKEX2660X.
Special Ex Protection: In case of damage to the enclosure or diaphragm, the pressure transmitter must be replaced. Installation must adhere to IEC/EN60079-25 and IEC/EN60079-14.
WARNING - Electrostatic Charging Hazard: Install in areas with low wind speed and where plug rubbing is unlikely. Clean with a damp cloth. Ensure the pressure connection has a reliable earth connection with impedance not exceeding 1 Gohm. MBS transmitters contain 1.2 nF capacitance from any input terminal to earth.
Special Conditions for Safe Use: If connected apparatus Ci and Li exceed 1% of Co and Lo parameters (excluding cable), then 50% of Co and Lo parameters are applicable and shall not be exceeded.
WARNING - Electro-static Discharge Precautions: Similar precautions apply. Ensure resistance to earth of metallic parts is less than 1 GOhm. The equipment does not provide 500 V isolation to earth as required by IEC/EN60079-11.
Installations Across Boundary Walls: For Category 1G equipment and less hazardous areas, installations must be gas-tight as required by IEC/EN60079-26. Gaskets and seals must be suitable for the process medium.
Demands on the Medium: Parts in contact with the medium are stainless steel (EN 1088-1 1.4404 / AISI 316L). Users must analyze process parameters and ensure the medium is neutral to stainless steel. The process connection must be gas-tight, potentially requiring suitable gaskets/seals. Gaskets and seals must be suitable for the process medium and pressure/temperature. Ensure correct tightening torque.
For assistance, please contact: Danfoss A/S, DK-6430 Nordborg, Denmark.
Find the EC-Type Examination Certificate at: www.ia.danfoss.com/ATEXcertificate
Installation and Dimensions
Detailed dimension drawings are provided for the MBS 4201 and MBS 4251 transmitters, showcasing various pressure port configurations including DIN 3852-E-G1/4 (with DIN 3869-14-NBR gasket), G1/2 A (EN 837), 1/4-18 NPT, 1/2-14 NPT, ISO 6149-2 (M14x1.5 with NBR O-ring), and M10x1 flange connection. Electrical connection diagrams specify pin assignments for standard connectors (EN 175301-803-A, ISO 15170) and cable types (PVC, ETFE).
Identification
The identification section explains how to interpret the transmitter's type number. This includes codes for:
- Measuring range: e.g., 10 for 0-1 bar, 38 for 0-600 bar.
- Gasket type: Codes 0-4 for No Gasket, Viton, or NBR.
- Pressure connection: Codes like GB04 for DIN3852-E-G1/4, AB08 for G1/2 A, AC04 for 1/4-18 NPT, AC08 for 1/2-14 NPT, FA08 for ISO 6149-2, DF02 for M10x1 flange.
- Electrical connection: Codes A0 (No Plug), A1 (PG9), A6 (PG11), G9 (Bayonet), DB/DC/J1 (PVC cable), DF/DH (ETFE cable).
It also details the output signal (4-20 mA) and pressure reference (Gauge or Absolute).
ATEX certification details are provided, including parameters like Ui=28V, Ii=100mA, Pi=0.7W, Li=8uH, Ci=62nF.
