Connecting The Sensor Cables - Endress+Hauser iTEMP TMT84 Kurzanleitung

Wiring
ESD - electrostatic discharge.
Protect the terminals from electrostatic discharge. Failure to observe this may result in
destruction or malfunction of parts of the electronics.
4.2

Connecting the sensor cables

When connecting 2 sensors, ensure that there is no galvanic connection between
them. The resulting equalizing currents distort the measurements considerably. The
sensors must be galvanically isolated from one another by connecting each sensor
separately to a transmitter. The device provides sufficient galvanic isolation (> 2 kV
AC) between the input and output.
The following connection combinations are possible when both sensor inputs are assigned:
RTD or resistance
transmitter, two-wire
RTD or resistance
transmitter,
Sensor
three-wire
input 2
RTD or resistance
transmitter, four-wire
Thermocouple (TC),
voltage transmitter
4.2.1 Connecting to spring terminals
A flat-bladed screwdriver, size 3 mm, is required.
34
RTD or RTD or
resistance resistance
transmitter, transmitter,
two-wire three-wire
Ã
Ã
-
Ã
Sensor input 1
RTD or
resistance
transmitter,
four-wire
Ã
-
Ã
-
- -
à Ã
TMT84
Thermocouple
(TC), voltage
transmitter
Ã
Ã
-
Ã
Endress+Hauser