BeiJer T21C, Руководство по установке

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Additional Installation Tips
7 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.
7.1 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.
Beijer Electronics, MAEN084E 25