Connecting The Measuring Unit - Endress+Hauser iTEMP HART TMT142 Mode D'emploi

TMT142 HART®
3.2

Connecting the measuring unit

If the device has not been grounded as a result of the housing being installed, we rec-
ommended grounding it via one of the ground screws.
3.2.1 HART® connection
If the HART® communication resistance is not built into the power supply, a 250 
communication resistor must be fitted into the 2-wire supply lines.
For connection hints, please take special notice of the documentation supplied by the
HART® Communication Foundation, specifically HCF LIT 20: "HART, a technical
overview".
Connection using the Endress+Hauser power supply RN221N
50
40
30
20
°C
10
52.5
0
®
HART connection with the Endress+Hauser power supply RN221N
Connection using other power supplies
SPS
SFX100, DXR375
Commubox
FXA 191
ReadWin® 2000,
FieldCare
Wiring
A0026195
25