Proline Prowirl 72
4 Wiring
E Hauser
25
4.2.3
HART connection
Users have the following connection options at their disposal:
• Direct connection to transmitter by means of terminals 1 (+) / 2 (–)
• Connection by means of the 4...20 mA circuit
!
Note!
• The measuring circuit's minimum load must be at least 250
Ω
.
• After commissioning, make the following setting:
– Switch HART write protection on or off (see Page 38)
• For connecting, please refer also to the documentation issued by the HART Communication
Foundation, in particular HCF LIT 20: “HART, a technical summary”.
Connecting the HART handheld terminal
A0001901
Fig. 18:
Electrical connection of the HART terminal:
a
HART terminal
b
Additional switching units or PLC with transmitter supply
Connecting a PC with operating software
A HART modem (e.g. Commubox FXA 191) is required for connecting a personal computer with
operating software (e.g. ToF Tool - Fieldtool Package).
A0001902
Fig. 19:
Electrical connection of a PC with operating software
a
PC with operating software
b
Additional switching units or PLC with passive input
c
HART modem, e.g. Commubox FXA 191
250
W
a
b
1 2
3 4
+
+
-
-
1
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375
FIELD COMMUNICATOR
3
6
9
-
250
W
a
RS 232
b
c
1 2
3 4
+
+
-
-
Содержание Proline Prowirl 72
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