Endress+Hauser tmt142 - Connecting the measuring unit

TMT142 HART® Wiring
25
3.2 Connecting the measuring unit
3.2.1 HART® connection
Connection using the Endress+Hauser power supply RN221N
A0026195
HART
®
connection with the Endress+Hauser power supply RN221N
Connection using other power supplies
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.
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”.
SFX100, DXR375
Commubox
FXA 191
ReadWin® 2000,
FieldCare
SPS
52.5
°C
0
10
30
40
50
20