Endress+Hauser iTEMP TMT142B - Page 17

iTEMP TMT142B Electrical connection
Endress+Hauser 17
Follow the general procedure. →  15
1
2
3
4
+
-
1
2
3
4
+
-
3
4
-
+
!
A0041526
 5 Connecting the device to the fieldbus cable
1 Fieldbus terminals - fieldbus communication and power supply
2 Shielded fieldbus cable
3 Ground terminals, internal
4 Ground terminal, external
5.3.2 Connecting the HART® communication resistor
If the HART® communication resistor is not integrated into the power supply unit, it is
necessary to incorporate a communication resistor of 250 Ω into the 2-wire cable. For
the connection, also refer to the documentation published by the HART® FieldComm
Group, particularly HCF LIT 20: “HART, a technical summary”.
TMT142B
FieldCare/
DeviceCare
HART® Modem
RN221N
PLC
200
A0041920
 6 HART® connection with Endress+Hauser power supply unit, including integrated communication resistor