Connecting The Measuring Device - Endress+Hauser iTEMP TMT162 Bedienungsanleitung

Wiring
The following connection combinations are possible when both sensor inputs are assigned:
RTD or resistance
transmitter, two-wire
Sensor input 2
RTD or resistance
transmitter, three-wire
RTD or resistance
transmitter, four-wire
Thermocouple (TC),
voltage transmitter
5.3

Connecting the measuring device

5.3.1 Cable glands or entries
CAUTION
L
Risk of damage
‣
Switch off power supply before installing or connecting the device. Failure to observe this
may result in destruction of parts of the electronics.
‣
If the device has not been grounded as a result of the housing being installed, we
recommended grounding it via one of the ground screws. Observe the grounding concept of
the plant! Keep the cable shield between the stripped fieldbus cable and the ground
terminal as short as possible! Connection of the functional grounding may be needed for
functional purposes. Compliance with the electrical codes of individual countries is
mandatory.
‣
If the shielding of the fieldbus cable is grounded at more than one point in systems that do
not have additional potential equalization, mains frequency equalizing currents can occur
that damage the cable or the shielding. In such cases the shielding of the fieldbus cable is
to be grounded on one side only, i.e. it must not be connected to the ground terminal of the
housing. The shield that is not connected should be insulated!
• The terminals for the fieldbus connection have integrated polarity protection.
• Cable cross-section: max. 2.5 mm²
• A shielded cable must be used for the connection.
Follow the general procedure. →  36.
38
RTD or RTD or
resistance resistance
transmitter, transmitter,
two-wire three-wire
 
 
- -
 
Sensor input 1
RTD or
resistance
transmitter,
four-wire
-
-
-

iTEMP TMT162
Thermocouple
(TC), voltage
transmitter


-

Endress+Hauser