Endress+Hauser iTEMP TMT84 - Wiring; Quick Wiring Guide

iTEMP TMT84 Electrical connection
Endress+Hauser 13
5.2 Connecting the measuring device
Terminal assignment
-
+
+
1
-
2
7
6
5
4
3
1
2
7
6
5
4
3
Sensor input 2
Sensor input 1
Bus connection
and supply voltage
Display connection
TC, mV
RTD, 4-, 3- and 2-wireΩ:
RTD, 3- and 2-wireΩ:
TC, mV
white
red
red
white
white
red
red
(black)
(yellow)
(black)
A0015015-EN
 5 Terminal assignment of head transmitter
NOTICE
‣
ESD - electrostatic discharge. Protect the terminals from electrostatic discharge. Failure
to observe this may result in the destruction or malfunction of parts of the electronics.
5.2.1 Connecting the sensor cables
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 interfere with the measurements considerably, resulting in
false readings.
‣
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,
two-wire
RTD or
resistance
transmitter,
three-wire
RTD or
resistance
transmitter,
four-wire
Thermocouple
(TC), voltage
transmitter
RTD or resistance
transmitter, two-wire
  - 
RTD or resistance
transmitter, three-wire
  - 