Promag 50
Wiring
Hauser
53
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. 38:
Electrical connection of a PC with operating software
1
PC with operating software
2
Auxiliary energy
3
Shielding
4
Other devices or PLC with passive input
5
HART modem, e.g. Commubox FXA195
4.3
Potential equalization
#
Warning!
The measuring system must be included in the potential equalization.
Perfect measurement is only ensured when the fluid and the sensor have the same electrical
potential. This is ensured by the reference electrode integrated in the sensor as standard.
The following should also be taken into consideration for potential equalization:
• Internal grounding concepts in the company
• Operating conditions, such as the material/grounding of the pipes (see Table)
4.3.1
Potential equalization for Promag D
• No reference electrode is integrated!
For the two ground disks of the sensor an electrical connection to the fluid is always ensured.
• Exampels for connections
4.3.2
Potential equalization for Promag W, P, L
• Reference electrode integrated in the sensor as standard
• Exampels for connections
4.3.3
Potential equalization for Promag H
No reference electrode is integrated!
For the metal process connections of the sensor an electrical connection to the fluid is always
ensured.
"
Caution!
If using process connections made of a synthetic material, ground rings have to be used to ensure
that potential is equalized (
37). The necessary ground rings can be ordered separately from
Hauser as accessories (
76).
+26
³
W
250
–27
1
2
3
5
4
