Graphic Operator Terminal /
INSTALLATION TIPS
6 INSTALLATION
TIPS
When experiencing communication problems in noisy environments or when operating close to
temperature limits, observe the following recommendations.
6.1
Grounding the Operator Terminal
The graphic operator terminal’s mounting clamps do not provide a secure grounding
connection between the terminal and the device cabinet.
Connect a 2.5 mm
2
wire between the graphic operator terminal’s quick-connect plinth and the
terminal chassis.
Connect a 6 or 4 mm
2
wire or grounding braid between the terminal’s chassis and the closest
grounding point on the door.
Connect a strong but short grounding braid between the door and the device cabinet.
Twist the cables onto the 24 V DC feed.
A ferrite core suppresses disturbances to the 24 V feed:
–
Two turns around the ferrite core provide four times the suppression of one turn.
–
Three turns around the ferrite core provide nine times the suppression of one turn.
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