Electrical Connection; Required Tool; Connecting Requirements; Cover With Securing Screw - Endress+Hauser Liquiphant FTL64 Operating Instructions Manual

Liquiphant FTL64
Endress+Hauser
For example:
• Process temperature
• Process pressure
• Ambient temperature
• Measuring range
 Are the measuring point number and labeling correct (visual inspection)?
 Is the device adequately protected from wet conditions and direct sunlight?
 Is the device properly secured?
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

In the case of devices for use in the hazardous area with a certain type of protection, the
cover is sealed by a securing screw.
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.
 15 Cover with securing screw
6.2.2

Connecting protective earth (PE)

The protective earth conductor at the device must only be connected if the device' s
operating voltage is ≥ 35 V
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.
The plastic housing is available with or without an external protective earth
connection (PE). If the operating voltage of the electronic insert is < 35 V, the plastic
housing has no external protective earth connection.
or ≥ 16 V eff.
DC AC
Electrical connection
4
2 x 0.7 Nm
A0039520
17