Connecting Requirements; Cover With Securing Screw; Potential Equalization - Endress+Hauser Liquiphant FTL51B Operating Instructions Manual

Liquiphant FTL51B HART
Endress+Hauser
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

Potential equalization

WARNING
L
Explosion Hazard!
‣
Please refer to the separate documentation on applications in hazardous areas for the
safety instructions.
1 Ground terminal for connecting the potential matching line
The protective ground on the device must not be connected. If necessary, the potential
matching line can be connected to the outer ground terminal of the transmitter before the
device is connected.
For optimum electromagnetic compatibility:
• Keep the potential matching line as short as possible
• Observe the minimum cross-section of 2.5 mm
Electrical connection
4
2 x 0.7 Nm
1
2
(14 AWG)
A0039520
A0046354
19