Burkert Type 8741 - Manual (Page 22)

22
Installation
Type 8741
7.7 connecting the functional earth
Warning!
danger of ignition and fire due to electrostatic discharge!
An electrostatic discharge of the device can ignite combustible
gas vapours.
▶ The housing is connected via a short cable with a large
cross-section to the functional earth (FE) to avoid a build up of
electrostatic charge.
danger from electromagnetic fields!
If the functional earth (FE) is not attached, the provisions of the
EMC regulations are not met!
▶ The housing is connected via a short cable with a large cross-
section to the functional earth (FE).
There are two screws that can be used for either the functional
earthing of the cable shielding or earthing the device.
Functional earth connection:
M3 screw
M4 screw
Fig. 15 : Connection options for functional earthing FE
connection of the cable screen to screw me3:
note!
requirements for the proper function of the device!
The cable shield must be attached to functional earth FE on the
two outermost devices.
Devices which are connected to the trunk pipe using a drop pipe
longer than 3 m, must also have their cable shielding attached. In
this case, the cable shielding is not pulled back over the sheath
insulation.
→
Draw a strand out of the braid of the cable shielding.
→
Attach the strand wire directly to the M3 screw of the functional
earth or use a cable lug to attach it to the functional earth.
Cable shielding
Fork-type cable lug
FE FE
Fig. 16 : Cable shielding connection
English