AKI-CDC-MOD-15T | ADDITIONAL INSTALLATION TIPS
8
ADDITIONAL INSTALLATION TIPS
When experiencing communication problems in for example noisy environments or when operating
close to temperature limits, the following recommendations are to be noticed.
8.1
Grounding the Operator Panel
1
2
3
4
5
6
5350
Door
Operator panel
Ferrite core
Mounting plate in the cabinet
Power supply
24 V DC
The operator panel’s mounting clamps do not provide a secure grounding connection between the
panel and the device cabinet, see 1 in drawing above.
1. Connect a wire that is sized correctly according to local electrical codes between the operator
panel’s quick-connect plinth and the panel’s chassis, see 2 in drawing above.
2. Connect a wire or grounding braid that is sized correctly according to local electrical codes
between the operator panel’s chassis and the closest grounding point on the door, see 3 in
drawing above.
3. Connect a strong but short grounding braid between the door and the device cabinet, see 4 in
drawing above.
4. Twist the cables onto the 24 V DC feed, see 5 in drawing above.
2 turns around the ferrite core provide 4 times the suppression of 1 turn.
3 turns around the ferrite core provide 9 times the suppression of 1 turn.
A ferrite core suppresses disturbances to the 24 V feed, see 6 in drawing above.
Note:
The grounding wires should be short and the conductor should have a large area.
A long, thin grounding wire has a very high impedance (resistance) at high frequencies and will not guide
disturbances to the ground.
Multi-wire conductors are better than single wire conductors with the same area.
A braided conductor wire with the same area is even better. The best is a short, thick grounding braid.
ky
Kollmorgen | October 2014
26
