Special conditions
1. For connection of this housing via the conduit entry approved for this purpose,
the corresponding seals must be located directly at the housing.
2. Please note the restrictions regarding the process temperature ranges
listed on page 4. During operation, the data have to be respected.
3. The measuring system must be integrated into the potential equalisation system.
Electrical connections
Caution!
Potential equalisation must exist along all current loops. A connection terminal (max.
cable cross-section 4 mm
2
) is available for this purpose. Alternatively, the connection
to a potential equalisation system can also be made with a solid, protected metallic
contact to the pipe, as long as the pipe is tied to the potential equalisation.
Electrical data
en
Caution!
Prowirl 70
Connection for the
potential equalisation system
xa019y02
Fig. 2
Connection to potential equalisa-
tion system
4...20 mA
0000
1
2
3
+
Wiring examples
can be found in
the following dra-
wings.
Prowirl 70 EEx i version (Prowirl 70****-*******B***)
Functional values
Safety values
1
2
3
Current output and current power supply circuit:
4...20 mA, opt. with HART resp. Intensor protocol
Voltage
12...30 V DC
(with HART/Intensor: 18,5...30 V DC)
Power consumption
<
1 W DC
PFM; two-wire current pulse output
non-scalable Vortex frequency 1...2850 Hz
pulse width 0,18 ms
Scalable pulse output
pulse width 0,05...2 s (f
max
= 100 Hz)
Current output and current power supply circuit:
Voltage
U
max
=
30 V
Current
I
max
=
300 mA
Power consumption P
max
=
1 W
Inductivity
L
i
=
0,2 mH
Capacity
C
i
=
11,2 nF
Prowirl 70 EEx d version (Prowirl 70****-*******C***)
Functional values
Safety values
1
2
3
Current output and current power supply circuit:
4...20 mA, optional with HART
Voltage
12...36 V DC
(with HART: 18,5...36 V DC)
Power consumption
<
1 W DC
PFM; two-wire current pulse output
non-scalable Vortex frequency 1...2850 Hz
pulse width 0,18 ms
Scalable pulse output
pulse width 0,05...2 s (f
max
= 100 Hz)
Current output and current power supply circuit:
Voltage
12...36 V
(U
m
= 250 V)
4...20 mA
0000
1
2
3
+
Wiring examples
can be found in
the following dra-
wings.
Prowirl 70
6
Hauser
