Wiring; Overview; Measurement Unit Connection - Endress+Hauser iTEMP RTD TMT 187 Mise En Service

5 Wiring

Wiring overview
Measurement unit
connection
A
H
H
26
5 Wiring
5.1

Overview

Terminal layout
Fig. 5: Head transmitter wiring
5.2

Measurement unit connection

Attention!
Switch off power supply before opening the housing cover. Do not install or connect the
unit to mains power. If this is not followed parts of the electronic circuit will be damaged.
• Sensors:
Connect the sensor cables to the respective head transmitter terminals (Terminals 3
to 6) by following the wiring diagram (s. fig. 5).
• Output signal and power supply:
Open the PG cable gland on the head transmitter or field housing. Feed the cable
through the opening in the PG cable gland and then connect the cable cores to ter-
minals 1 and 2 according to the wiring diagram (s. fig. 5).
Hint!
The screws on the terminals must be screwed up tightly.
Potential leveling
Hint!
Please take note of the following when installing the head transmitter remotely in a field
housing. The screen on the output (output signal 4...20 mA) must have the same
potential as the screen at the sensor connections!
For an effective screening the cable screen must be widely connected to the field
housing. This can be achieved by connecting the cable screen to the special EMC-
PG13.5 cable gland.
Open the field housing PG cable gland and connnect the screen of the output and
sensor connection according to the figure next page ( Fig. 6: "Screening on remote
installation").
Temperature head transmitter