CE Conformity, Directives and Standards
KeTop T50VGA
158
User's Manual, Version: 1.3
© KEBA 2007
14.3.3.2 Shielding inside the control cabinet
In many cases a range of interference sources, such as servo drive mod-
ules, transformers, contactors and relays, is present in the control cabinet.
It is therefore necessary to run the cable shield from the connector housing
(control cabinet) to the control (continuous connection from the handheld
terminal to the control).
When using the appropriate connection box and a shielded cable for the
data line from the connection box to the control, the continuous, high fre-
quency compatible connection of the shield from the KeTop to the control is
guaranteed.
PW
R
SHIELD
1
10
X1
X3
6
1
Control
S2
Control lines:
enabling switch,
emergency stop switch,
power supply
Unshielded
data lines,
as short as
possible!
KeTop
KEBA connection box CB 211
Example of a correct shield connection in a KEBA connection box
If for some reason a connection box cannot be used, the continuous con-
nection of the shielding on less critical interface types such as RS-232-C
takes place by contacting the connector housing with the control cabinet
and inside the control cabinet by contacting the shielding with the control
cabinet (using shielding clips). The smaller the distance between the con-
tacting of the connector housing on the control cabinet to the cable clip in
the control cabinet, the better the shield damping.