Cable Specifications Profibus Pa; Terminal Voltage Profibus Pa; Potential Equalisation - Endress+Hauser PROFIBUS Gammapilot M FMG60 Operating Instructions Manual

Wiring
"
24
4.5

Cable specifications Profibus PA

Twisted, screened pairs must be used. The following specification must be met for explosion
hazardous application (EN 50 020, FISCO model):
• Loop-resistance (DC): 15...150 Ω/km,
• Specific inductance: 0.4...1 mH/km,
• Specific capacitance: 80...200 nF/km
The following cable types can be used, for example
Non-Ex-area:
• Siemens 6XV1 830-5BH10 (black),
• Kerpen CEL-PE/OSCR/PVC/FRLA FB-02YS(ST)YFL (grey)
• Belden 3076F (orange)
Ex-area:
• Siemens 6XV1 830-5AH10 (blue),
• Belden 3076F, Kerpen CEL-PE/OSCR/PVC/FRLA FB-02YS(ST)YFL (blue)
4.6

Terminal voltage PROFIBUS PA

The following values are the voltages across the terminals directly at the instrument:
Type
standard
EEx ia (FISCO model
EEx ia (Entity concept)
The current consumption is approx. 11 mA for the range of voltages given above.
4.7

Potential equalisation

For maximum EMC protection please observe
the following points:
• The external ground terminal on the
transmitter must be connected to ground.
For optimum electromagnetic compatibility
(EMC) the connection should be as short as
possible. Ideally, a ground strap should be
used.
• The continuity of the cable screening between
tapping points must be ensured.
• If potential equalisation is present between
the individual grounding points, ground the
screening at each cable end or connect it to
the device housing (as short as possible).
• If there are large differences in potential
between grounding points, the grounding
should run via a capacitor that is suitable for
high frequency use (e.g. ceramic 10 nF/
250 V&).
Caution!
Applications, which are subject to the explosion prevention, permit only under special conditions
the repeated grounding of the protective screen , see to EN 60 079-14.
minimum terminal maximum terminal
voltage
9 V
9 V
9 V
Gammapilot M FMG 60 - PROFIBUS PA
voltage
32 V
17,5 V
24 V
*
L00-FMG60xxx-04-00-00-xx-004