Additional Installation Tips; Grounding The Device - Beijer Electronics BoX2 base Installation Manual

6. Additional Installation Tips

When experiencing communication problems in noisy environments or when operating close to
temperature limits, the following recommendations are to be noticed.

6.1. Grounding the Device

Door
Box2 device
2
1
5
Ferrite core
6
The mounting clamps of the BoX2 device do not provide a secure grounding connection between the
device and the device cabinet, see 1 in drawing above. To ground the device:
1. Connect a wire, that is sized correctly according to local electrical codes, between the quick-
connect terminal connector on the device and the chassis of the device, 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 device 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.
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 does 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.
Beijer Electronics, MAEN274
Mounting plate in the cabinet
3
Power supply
24 V DC
4
15
Additional Installation Tips
5350
2023-09