Endress+Hauser iTEMP TMT162 - Display Mounting and Post-Installation Checks

Electrical connection iTEMP TMT162
14 Endress+Hauser
+
-
1
2
3
4
5
6
+
-
3
4
S1
3
S2
-
+
+
-
1
3
!
2
A0045949
 4 Wiring of the field transmitter, TC, dual sensor input
1 Sensor input 1, TC
2 Sensor input 2, TC
3 Field transmitter power supply and analog output 4 to 20 mA or fieldbus connection
NOTICE
When connecting 2 sensors ensure that there is no galvanic connection between the
sensors (e.g. caused by sensor elements that are not isolated from the thermowell). The
resulting equalizing currents distort the measurements considerably.
‣
The sensors must remain galvanically isolated from one another by connecting each sensor
separately to a transmitter. The transmitter provides sufficient galvanic isolation (> 2 kV
AC) between the input and output.
The following connection combinations are possible when both sensor inputs are assigned:
Sensor input 1
Sensor input 2
RTD or
resistance
transmitter, 2-
wire
RTD or
resistance
transmitter, 3-
wire
RTD or
resistance
transmitter, 4-
wire
Thermocouple
(TC), voltage
transmitter
RTD or resistance
transmitter, 2-wire
  - 
RTD or resistance
transmitter, 3-wire
  - 
RTD or resistance
transmitter, 4-wire
- - - -
Thermocouple (TC),
voltage transmitter
   