Endress+Hauser iTEMP TMT71 - Connecting the Sensor Cables; Connecting the Transmitter; Special Connection Instructions

DRAFT
DRAFT DRAFT DRAFT DRAFT DRAFT DRAFT
DRAFT DRAFT DRAFT
Electrical connection iTEMP TMT71/72
In the event of a thermocouple (TC) measurement, a 2-wire RTD can be connected to
measure the reference junction temperature. This is connected to terminals 4 and 6.
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.
5.3 Connecting the sensor cables
Terminal assignment of the sensor connections→  6,  15.
5.4 Connecting the transmitter
L
CAUTION
‣
Switch off power supply before installing or connecting the transmitter. Failure to
observe this may result in the destruction of parts of the electronics.
Cable specification
• A normal device cable suffices if only the analog signal is used.
• A shielded cable is recommended for HART
®
communication. Observe grounding
concept of the plant.
Please also observe the general procedure on →  15.
1 2 3
2-
1+
2- 1+
2- 1+
!
4
5
6
7
!
4
7
!
5
A0017841
 7 Connecting the signal cables and power supply
1 Head transmitter installed in field housing
2 Head transmitter installed in terminal head
3 DIN rail transmitter mounted on DIN rail
4
Terminals for HART
®
protocol and power supply
5 Internal ground connection
6 External ground connection
7
Shielded signal cable (recommended for HART
®
protocol)
• The terminals for connecting the signal cable (1+ and 2-) are protected against
reverse polarity.
• Conductor cross-section:
Max. 2.5 mm
2
for screw terminals
5.5 Special connection instructions
Shielding and grounding
16 V. 1, Rev. 2, 4-10-2018 Endress+Hauser