Cerabar M PMP51

Summary

Product Identification

• Product Line: Endress + Hauser Pressure measurement
• Product Name: Cerabar M
• Models: PMC51, PMP51, PMP55
• Communication Protocols: 4 to 20 mA, HART, IO-Link, PROFIBUS PA, FOUNDATION Fieldbus

Application

The Cerabar M is used for:

• Absolute and gauge pressure measurement in gases, steams, and liquids across various process engineering applications.
• Level, volume, or mass measurement in liquids.
• High process temperature applications.

Process Temperature Limits

• Without diaphragm seals: up to 130 °C (266 °F) for a maximum of 60 minutes; also listed as 150 °C (302 °F).
• With diaphragm seals: up to 400 °C (752 °F).

Pressure Limits

• High pressure applications up to 400 bar (6,000 psi).

Features and Benefits

• Excellent reproducibility and long-term stability.
• High reference accuracy up to ±0.10%.
• PLATINUM version: ±0.075% accuracy.
• Turn down ratio up to 100:1.
• Integrated platform for differential pressure, hydrostatics, and pressure (Deltabar M, Deltapilot M, Cerabar M).
• User-friendly navigation for easy commissioning.
• Suitable for process pressure monitoring up to SIL 2, certified to IEC 61508 Edition 2.0 and IEC 61511 by TÜV NORD.
• Patented TempC process membrane for diaphragm seals minimizes temperature-induced measurement errors.
• Available in ASME BPE-compliant versions.

Measuring Principles

• Ceramic Process Membrane (PMC51 - Ceraphire®): Oil-free, direct pressure application to the membrane. Pressure changes capacitance between the ceramic substrate and the membrane. Guaranteed overload resistance up to 40 times nominal pressure. High chemical and mechanical stability.
• Metallic Process Membrane (PMP51, PMP55): Pressure deflects the membrane, and a fill fluid transfers pressure to a resistance bridge (semiconductor technology).
  • PMP51: Suitable for process pressures up to 400 bar (6,000 psi). High long-term stability. Guaranteed overload resistance up to 4 times nominal pressure. Reduced thermal effect compared to diaphragm seal systems.
  • PMP55: Utilizes a diaphragm seal to transfer pressure to the measuring cell membrane. Suitable for pressures up to 400 bar (6,000 psi) and extreme process temperatures, depending on the version. High long-term stability. Guaranteed overload resistance up to 4 times nominal pressure.

Measuring Range

See the official PDF for exact tabulated values for PMC51 (gauge and absolute pressure) and PMP51/PMP55 (gauge and absolute pressure) regarding measuring cell types, maximum measuring ranges, lowest calibratable spans, MWP, OPL, and vacuum resistance.

• Note: Highest factory-configurable turn down is 20:1; higher ratios are available on request or can be set in the device.

Output Signal

• 4 to 20 mA analog (2-wire)
• 4 to 20 mA with HART communication protocol (6.0) (2-wire)
• IO-Link communication (3-wire)
• PROFIBUS PA (Profile 3.02)
• FOUNDATION Fieldbus

Signal Range (4 to 20 mA)

• Analog, HART, and IO-Link: 3.8 to 20.5 mA.

Signal on Alarm

• As per NAMUR NE 43.
• Analog: Signal over-range (> 20.5 mA), Signal under-range (< 3.8 mA), Min. alarm (3.6 mA).
• HART: Options include Max. alarm (21-23 mA), Hold measured value, Min. alarm (3.6 mA).
• IO-Link: Max. alarm (22 mA), Min. alarm (3.6 mA), Hold measured value.
• PROFIBUS PA: Configurable in Analog Input block (Last Valid Out Value, Fail-safe Value, Status Bad).
• FOUNDATION Fieldbus: Configurable in Analog Input block (Last Good Value, Fail-safe Value, Wrong Value).

Power Supply

• 4 to 20 mA Analog: 11.5 to 45 V DC (versions with 35 V DC plug-in connection).
• 4 to 20 mA HART:
  • Intrinsically safe: 11.5 to 30 V DC.
  • Other types of protection/uncertified: 11.5 to 45 V DC (versions with 35 V DC plug-in connection).
• IO-Link: 11.5 to 30 V DC (analog output only); 18 to 30 V DC (with IO-Link).
• PROFIBUS PA: 9 to 32 V DC (non-hazardous areas).
• FOUNDATION Fieldbus: 9 to 32 V DC (non-hazardous areas).

Current Consumption

• IO-Link: < 60 mA.
• PROFIBUS PA: 11 mA ±1 mA.
• FOUNDATION Fieldbus: 16 mA ±1 mA.

Electrical Connection

Cable Entry Options

See the official PDF for a table detailing connection options (M20 gland, G ½" thread, NPT ½" thread, M12 plug, 7/8" plug, HAN7D plug, PE cable, M16 valve connector) and their corresponding degree of protection (IP ratings).

Terminals

• Supply voltage and internal ground: 0.5 to 2.5 mm² (20 to 14 AWG).
• External ground terminal: 0.5 to 4 mm² (20 to 12 AWG).

Performance Characteristics

Ceramic Process Membrane (PMC51)

• Response Time: See the official PDF for detailed specifications (T63 and T90).
• Total Performance: See the official PDF for tabulated values.
• Resolution: See the official PDF for tabulated values.
• Total Error: See the official PDF for tabulated values.
• Long-term Stability: See the official PDF for tabulated values.

Metallic Process Membrane (PMP51, PMP55)

• Response Time: See the official PDF for detailed specifications (T63 and T90).
• Total Performance: See the official PDF for tabulated values.
• Resolution: See the official PDF for tabulated values.
• Total Error: See the official PDF for tabulated values.
• Long-term Stability: See the official PDF for tabulated values.

Environment

• Ambient Temperature Range: See the official PDF for details.
• Storage Temperature Range: See the official PDF for details.
• Climate Class: See the official PDF for details.
• Degree of Protection: See the official PDF for details (e.g., IP66/68, NEMA 4X/6P).
• Vibration Resistance: See the official PDF for details.
• Electromagnetic Compatibility: See the official PDF for details.

Mechanical Construction

• Various housing options are available, including F31 (aluminum) and F15 (stainless steel, hygienic).
• Process Connections: Numerous options exist for PMC51, PMP51, and PMP55, including internal and flush process membranes, hygienic connections, and ANSI threads. See the official PDF for detailed diagrams and specifications.

Materials

• Materials in contact with the process and materials not in contact with the process are detailed in the official PDF.
• Seal materials and fill fluids are also specified.

Operability

• Operating Concept: Local and remote operation supported.
• Local Operation: Via local display, handheld terminal, or PC with operating program.
• Operating Languages: See the official PDF for a list.

Certificates and Approvals

• CE mark
• RoHS
• RCM marking
• Various Ex approvals (ATEX, IEC Ex, FM, CSA)
• Corrosion test reports
• EAC conformity
• Suitable for hygiene applications
• cGMP certification
• ASME BPE 2012 certification
• Functional safety SIL
• CRN approval
• AD2000
• Pressure Equipment Directive 2014/68/EU (PED)
• ANSI/ISA 12.27.01 compliance
• Inspection certificates available.

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Disclaimer: This extraction may have missed figures, footnotes, or revisions. Contractual data must match the OEM PDF revision used on the project.

Official datasheet (PDF)

Lenntech datasheet mirror