Wire shielding. Wire shielding must end as close to the incoming terminal boards as possible.
Metal panels. All the panels which make up the system must be interconnected so that they present low
impedance to high frequencies. This is obtained by adding numerous screws between the unpainted
covers or using non-anodized aluminum. All the metal parts are connected with a good ground
connection.
GUIDE FOR APPLYING LOW VOLTAGE SAFETY
The Laser marking system complies with Low Voltage Directive 2006/95/CE concerning electrical
equipment operating at voltages between 50 and 1000 VAC. Warning labels and shields for protecting
the user are required. The laser marking system installation should be evaluated to ensure that it
complies with the requirements laid down in the Directives on Low Voltage.
(1)
Installation
. Only professionally trained individuals can carry out installation work, connect the
external power source and, in general, perform any type of work on the electrical part.
Dangerous voltage is present inside the Laser source.
(2)
Power cut-off device
. Since the laser system is designed to be incorporated in a system
including other equipment, it is necessary to install a manually controlled power cut-off device
common to the entire system. This is the installer’s responsibility.
(3)
Stop function
. Since the laser system is designed to be incorporated in a system including
other equipment, it is necessary to create a category 0 stop common to the entire system. This
is the installer’s responsibility.
(4)
Emergency stop
. Since the laser system is designed to be incorporated in a system including
other equipment, the emergency stop must be installed based on the technical specifications
of the system, bearing in mind that it may be necessary in some equipment to let cooling water
circulate for a few seconds before disconnecting power. The emergency function is the
installer’s responsibility.
(5)
Protection category
. Most HITACHI Laser System have a minimum protection category of
IP20. To comply with the Machine Directive and Standard EN 60204, the installer is
responsible for placing them in a suitable container according to the protection category
required for the end use.
(6)
Ground Protection
. One of the three conductors of the electrical supply is grounded, meaning
it has no electrical power.
This wire must be always connected to the laser
.
The main reason for use of a ground connection between the laser and the electricity is the safety of
individuals, and the second is to protect the system.
In applications where disturbances exceed legal limits, there may be disturbances and interferences
between the laser system and other appliances, despite correct conformance with installation rules.
If there are interferences with another laser system, do not use it at the same time, or move the two
devices further apart.
1-13 •COMPLIANCE WITH REGULATION AND LAW
