Equipotential bonding and shielding

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HMIs, human machine interfacesEagle ET/MT-3x6...Interference suppression measures / Installation guidelinesEquipotential bonding and shielding


In principle, fitters and operators have to observe the national installation directives and/or those superceding them.


Alternative ways to connect the cable screen are available for EMC interference but they must conform to national installation directives and/or those superceding them.



Connection detailed

Shield connection terminal detailed


cable shield



system’s equipotential bonding

in safety area

Connector threaded bolt

at Device (Ex area)


The Ex-e connection box has a screen connection rail for the alternative screen connection solution. In this case, the cable screening can be extended by a short wire (minimum diameter 1.5mm²) and connected to the clamping screws.

This equipotential bonding connection part is, as mentioned above, internally connected with the GND supply cable (X1 pins 3 and 4).


The ET-/MT-xx6’s equipotential bonding (6mm threaded bolt) must be connected to the system’s equipotential bonding (see illustration above).


Connection detail for electrical bonding (recommended)



1.Enclosure HMI

2.Washer (2x)

3.Tooth lockwashers

4.Washer spring


6.Threaded bolt

7.Cable lug with eye


Detail shield connection in Rev. 3:




Click to expand or collaps object.        For Rev. 1 and 2 devices:


equipotential bonding terminal


Please note the descriptions for each connection – they contain all details required for the individual connection (twisting, shielding, etc.)


See also:

Kapitelseite Connection to

Kapitelseite Interference suppression measures / Installation guidelines

Kapitelseite EMC-compliant installation



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