Wiring
CNGmass DCI
20
Hauser
4.3.3
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 to 20 mA circuit
!
Note!
• The measuring circuit's minimum load must be at least 250
Ω
.
• The CURRENT SPAN function must be set to "4 to 20 mA"
(individual options
È
"Description of Device Parameters" manual).
• 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".
A0004586
Fig. 14:
Electrical connection of HART handheld terminal
1
HART handheld terminal
2
Auxiliary energy
3
Shielding
4
Other switching units or PLC with passive input
Connection of a PC with an operating software
In order to connect a PC with operating software (e.g. FieldCare), a HART modem (e.g. Commubox
FXA195) is needed.
A0004592
Fig. 15:
Electrical connection of a PC with operating software
1
PC with operating software
2
Auxiliary energy
3
Shielding
4
Other switching units or PLC with passive input
5
HART modem, e.g. Commubox FXA195
+26
-27
4
2
250
1
3
+26
250
–27
1
2
3
5
4