Cerabar M PMC51, PMP51, PMP55
12 Endress+Hauser
L
WARNING
Risk of explosion!
‣
If using intrinsically safe devices, strict compliance with the rules for interconnecting intrinsically
safe circuits as stipulated in IEC60079-14 (proof of intrinsic safety) is mandatory.
Communication protocol
• 4 to 20 mA without communication protocol (analog electronics)
• 4 to 20 mA with HART communication protocol
• PROFIBUS PA
• The Endress+Hauser devices meet the requirements of the FISCO model.
• Due to a low current consumption of 11 mA ± 1 mA, the following number of devices can be
operated on one bus segment if installing as per FISCO: up to 8 devices for Ex ia, CSA IS and FM
IS applications or up to 31 devices for all other applications e.g. in non-hazardous areas, Ex nA
etc. Further information on PROFIBUS PA can be found in Operating Instructions BA00034S
"PROFIBUS DP/PA: Guidelines for planning and commissioning" and in the PNO Guideline.
• FOUNDATION Fieldbus
• The Endress+Hauser devices meet the requirements of the FISCO model.
• Due to a low current consumption of 16 mA ± 1 mA, the following number of devices can be
operated on one bus segment if installing as per FISCO: up to 6 devices for Ex ia, CSA IS and FM
IS applications or up to 22 devices for all other applications e.g. in non-hazardous areas, Ex nA
etc. Further information on FOUNDATION Fieldbus, such as requirements for bus system
components, can be found in Operating Instructions BA00013S "FOUNDATION Fieldbus
Overview".
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