INSTALLATION
Series 642
20/73
Edition 2013-08-22
603685EA
4.5.1
Ground connection
Recommendation for ground strap between controller ground and system chassis.
Material
L
(Length max.)
B1
(min.)
B2
(min.)
d1
( )
d2
( )
copper tinned
200 mm
25 mm
25 mm
4.5 mm
customized
Connection plates of ground strap must be total plane for a good electrical contact!
The connection point at chassis (FE) must be blank metal (not coated). It is also
possible to connect the ground strap at system chamber if it is well connected to
PE.
Avoid low chassis cross section to the system PE connection. (min. same cross
section as ground strap)
d2
Chassis (PE)
(Protective Earth)
B1
B2
d1
L
PE
Recommended torque
: 1,3…1,7Nm
Ground strap
System
