Equipotential bonding and shielding

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HMIs, human machine interfaces ► Thin Client ET/MT-5x6 ► Interference suppression measures / Installation guidelines ► Equipotential 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

Terminal

cable shield

Skz_Schirmanschluss_GeraetRev3

 

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)

Explanation

PA_Anschluss

1.Enclosure HMI

2.Washer (2x)

3.Tooth lockwashers

4.Washer spring

5.Nut

6.Threaded bolt

7.Cable lug with eye

 

Detail shield connection in Rev. 3:

 

Fgr_ShieldConnect_Rev3

 

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

Fgr_PA_ToRev2

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 Connecting of

Kapitelseite Interference suppression measures / Installation guidelines

Kapitelseite EMV gerechter Aufbau

 

 

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