Endress+Hauser PROline prowirl 72 Documentation Technique page 20

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8
Electrical connections
➀
Fig. 1: Electrical connections Prowirl 72 resp. Prowirl 73
➀
= Ground terminal for potential equalisation
➁
= Ground terminal in the wiring compartment
Caution!
• Ground potential equalisation must exist between the safe and hazardous area.
• The transmitter is to be securely connected to the potential equalization system using
either the transmitter's esternal screw terminal ➀, or the ground terminal ➁ in the
wiring compartment.
• Alternatively, the sensor and the transmitter (compact version) or the connection
housing can be connected to the potential equalization system via the pipeline
when a ground connection according to regulations can be assured.
The table below contains the values that are identical for all versions, irrespective of
the type code.
Transmitter Prowirl 72***-******H****W; Prowirl 73***-******H****W
Terminals
Designation
Functional values
Transmitter Prowirl 72***-******H****A; Prowirl 73***-******H****A
Terminals
Designation
Functional values
Esc
-
+ E
1 (+)
Power supply / 4...20 mA HART
U ≤ 30 V;
P ≤ 1 W
1 (+) 2 (–)
Power supply / 4...20 mA
HART
U ≤ 30 V;
P ≤ 1 W
PROline Prowirl 72/73
➁
1 2
3 4
➀
2 (–)
3 (+) 4 (–)
Optional
Pulse/status output
U ≤ 30 V;
P ≤ 1 W
Endress+Hauser