H
oogkamerstraat 188, 9140 Temse Oos-Vlaanderen Belgium +32 470 80 80 83
9
QUICK TIP-
This arrangement improves immunity to electromagnetic disturbances because the cable
forms a series of successive coils, each of which faces in the opposite direction to the next one: in
this manner any magnetic field in the environment traverses each pair of coils in opposite directions
and its effect is thus very reduced (theoretically, the effect on each coil is exactly the opposite of the
effect on the next one and thus the effect is cancelled).
Wiring characteristics:
•
0.22
–
0.5 mm2 for runs up to 300 meters
•
0.5
–
0.75 mm2 for runs up to 1200 meters
•
Characteristic impedance: 120 Ohm +/- 10%;
•
Use Shielded twisted-pair cable if the bus cable exceeds 3m.
•
Each shield must be grounded at one side only
•
Overvoltage/overcurrent transient protection should be provided
