Emi - Avery Dennison ALS 221 User Manual

Operators Manual
ALS 221

4.3 EMI

To protect the machines against electrical noise and to protect production of electrical noise
you have to follow this rules:
Rule 1
All metallic parts must have a good and plane contact (no lacquer, aluminium oxide is an isola-
tor). Use scratch washers.
Rule 2
Signal lines (Data- , communication- and control cable) has to separated to power cables. The
minimum distance is 50 cm (20 cm inside a cabinet).
Rule 3
All signal lines should be lead in the machine or cabinet only on one side.
Rule 4
Unshielded cables must be twisted (both poles).
Rule 5
On all inductive components (relays, valves) must be directly connected a clamp circuit (diode,
MOV).
Rule 6
All signal lines must be shielded. The shield must have a good earth connection on both sides.
For the connection use metallic clamps. Don't use a soldered wire for this connection.
In case of different earth potential on both cable sides install parallel a cable of at minimum 10
2
mm .
Rule 7
The shield of analogue cable (Video etc) should be shielded only on one side. Normally there is
no such cable with labelling machines.
Rule 8
Line filter has to be mounted directly on the cable entry.
Rule 9
Cables should not fly in the air. Lead all cables nearby metallic, grounded parts. Ground un-
used cables and wires in a cable at minimum on one side, better on both.
Rule 10
Cables should not be longer as necessary.
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