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Additional Installation Tips
7. Additional Installation Tips
When experiencing communication problems in noisy environments or when operating close to
temperature limits, the following recommendations are to be noticed.
7.1. Grounding the HMI Panel
Door
HMI panel
2
1
5
Ferrite core
6
The mounting clamps of the HMI panel do not provide a secure grounding connection between the
panel and the device cabinet, see 1 in drawing above. To ground the HMI panel:
1.
Connect a wire, that is sized correctly according to local electrical codes, between the quick-
connect terminal connector on the HMI panel and the chassis of the panel, see 2 in drawing
above.
2.
Connect a wire or grounding braid, that is sized correctly according to local electrical codes,
between the chassis of the HMI panel 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.
•
Connect a wire or grounding braid, that is sized correctly according to local electrical codes,
between the chassis of the HMI panel and the closest grounding point.
2023-09
Mounting plate in the cabinet
3
Power supply
24 V DC
4
22
5350
Beijer Electronics, MAEN349
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