4 Wiring
PROline Promag 10
42
Hauser
4.2.3
HART connection
Users have the following connection options at their disposal:
•
Direct connection to transmitter by means of terminals 26 / 27
•
Connection by means of the 4...20 mA circuit.
!
Note!
•
The measuring loop's minimum load must be at least 250
Ω
.
•
The CURRENT SPAN function must be set to “4–20 mA HART” (factory setting).
•
See also the documentation issued by the HART Communication Foundation, and in
particular HCF LIT 20: “HART, a technical summary”.
Connection of the HART handheld communicator
See also the documentation issued by the HART Communication Foundation, and in
particular HCF LIT 20: “HART, a technical summary”.
Fig. 28:
Electrical connection of the HART terminal:
1 = HART communicator terminal, 2 = Power supply, 3 = Shield, 4 = Other evaluation devices or PLC with
passive input
Connection of a PC with an operating software
In order to connect a PC with an operating software (e.g. “FieldTool™”), a HART modem
(e.g. “Commubox FXA 191”) is needed.
Fig. 29:
Electrical connection of Commubox FXA 191:
1 = PC with operating software, 2 = Power supply, 3 = Shielding, 4 = Other switching units or PLC with passive
input, 5 = HART modem, e.g.
Commubox FXA 191
I
O
+26
250
-27
1
2
3
4
F06-
x
x
x
x
x
x
x
x
-0
4
-x
x
-x
x
-x
x
-0
1
2
+26
250
-27
RS 232
1
3
5
4
2
F06-
x
x
x
x
x
x
x
x
-0
4
-x
x
-x
x
-x
x
-01
3§
