Electrical Connection; Required Tool; Connecting Requirements; Cover With Securing Screw - Endress+Hauser Liquiphant FTL63 Density Operating Instructions Manual

Liquiphant FTL63 Density
Endress+Hauser
6

Electrical connection

6.1

Required tool

• Screwdriver for electrical connection
• Allen key for screw of cover lock
6.2

Connecting requirements

6.2.1

Cover with securing screw

The cover is locked by a securing screw in devices for use in hazardous areas with certain
explosion protection.
NOTICE
If the securing screw is not positioned correctly, the cover cannot provide secure
sealing.
‣
Open the cover: slacken the screw of the cover lock with a maximum of 2 turns so that
the screw does not fall out. Fit the cover and check the cover seal.
‣
Close the cover: screw the cover securely onto the housing, making sure that the
securing screw is positioned correctly. There should not be any gap between the cover
and housing.
 17 Cover with securing screw
6.2.2

Connecting protective earth (PE)

When the device is used in hazardous areas, it must always be included in the potential
equalization of the system, irrespective of the operating voltage. This is possible by
connecting to the inner or outer protective ground connection (PE).
6.3

Connecting the device

Housing thread
The threads of the electronics and connection compartment can be coated with an
anti-friction coating.
The following applies for all housing materials:
Do not lubricate the housing threads.
6.3.1 2-wire density (electronic insert FEL60D) for density
measurement
NOTICE
Operation with other switching units is not permitted.
Destruction of electronic components.
‣
Do not install the FEL60D electronic insert in devices that were originally used as point
level switches.
Electrical connection
4
2 x 0.7 Nm
A0039520
21