iTEMP TMT142B Electrical connection
Endress+Hauser 15
5 Electrical connection
5.1 Connecting requirements
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CAUTION
The electronics could be destroyed
‣
Switch off the power supply before installing or connecting the device. Failure to
observe this may result in the destruction of parts of the electronics.
‣
When connecting Ex-certified devices, please take special note of the instructions and
connection schematics in the Ex-specific supplement to these Operating Instructions.
Contact the supplier if you have any questions.
‣
Do not occupy the display connection. An incorrect connection can destroy the
electronics.
NOTICE
Do not over tighten the screw terminals, as this could damage the transmitter.
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Maximum torque = 1 Nm (³⁄₄ lbf ft).
A0041651
General procedure for terminal connection:
1. Loosen the cover clamp.
2. Unscrew the housing cover together with the O-ring.
3. Remove the display module from the electronics unit.
4. Loosen the two fixing screws on the electronics unit and then remove the unit from
the housing.
5. Open the side cable glands of the device.
6. Feed the corresponding connecting cables through the openings of the cable gland.
7. Wire the sensor cables and fieldbus/power supply as specified in the 'Connecting the
sensor' and 'Connecting the measuring device' sections.
On completion of the wiring, screw the screw terminals tight. Tighten the cable glands
again and reassemble the device by following the reverse order of steps. Refer to the
information provided in the 'Ensuring the degree of protection' section. Clean the thread in
the housing cover and housing base and lubricate if necessary. (Recommended lubricant:
Klüber Syntheso Glep 1). Screw the housing cover tight again, fit the cover clamp and
fasten.
In order to avoid connection errors always follow the instructions in the post-
connection check section before commissioning the device!
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