Proline Prosonic Flow 91
Installation
Hauser
31
3.11.2
Terminal assignment
!
Note!
Functional values of the outputs and power supply
3.11.3
HART connection
Users have the following connection options at their disposal:
• Direct connection to transmitter by means of terminals 26(+) and 27 (
)
• Connection by means of the 4 to 20 mA circuit.
• The measuring loop's minimum load must be at least 250
.
• After commissioning, make the following settings:
– CURRENT SPAN function
"4–20 mA HART"
– Switch HART write protection on or off
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".
a0005573
Fig. 31:
Electrical connection of HART handheld Field Xpert SFX100
1
HART handheld Field Xpert SFX100
2
Auxiliary energy
3
Shielding
4
Other 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. "FieldCare), a HART modem
(e.g. Commubox FXA 195) is needed.
a0005574
Fig. 32:
Electrical connection of a PC with an operating software
1
PC with an operating software
2
Other evaluation devices or PLC with passive input
3
Shield
4
HART modem, e.g. Commubox FXA 195
24 (+)
25 (–)
26 (+)
27 (–)
1 (L1/L+)
2 (N/L–)
Pulse output
HART current output
Power supply
+26
³
W
250
– 27
1
3
4
2
+26
³
W
250
–27
RS 232
1
3
4
2
