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Proline Prosonic Flow 91
!
Endress+Hauser
4.2.2
Terminal assignment
24 (+)
25 (–)
Pulse output
Note!
Functional values of the outputs and power supply → ä 61
4.2.3
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 Ω.
• After commissioning, make the following settings:
– CURRENT SPAN function → "4–20 mA HART"
– Switch HART write protection on or off → ä 31
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".
4
Fig. 25:
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.
2
1
RS 232
Fig. 26:
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
Terminal No. (wiring diagram → å 24)
26 (+)
27 (–)
HART current output
³
W
250
3
1
³
W
250
3
4
Wiring
1 (L1/L+)
2 (N/L–)
Power supply
– 27
+26
2
a0005573
–27
+26
a0005574
25
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