NKT Photonics Koheras ADJUSTIK, Руководство по эксплуатации продукта

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Connecting the safety interlock
84
Figure 57 Interlock connected to a door switch - Laser SHUTDOWN
Caution: Do not short-circuit the Interlock input. Short-circuiting the interlock cir -
cumvents safety regulations and NKT Photonics does not take liability for any in -
juries or damage caused by doing so.
Caution: The switch connected to the interlock must be of an approved type. Fur -
ther, the switch must be installed in a manner so that its operation cannot be fixed
in the open state using a tool.
Warning: If the interlock is bypassed using an interlock defeater, personnel may
be exposed to hazardous laser radiation. To reduce the risk to personnel, the per -
son or group responsible for operation of the equipment must undertake a risk as -
sessment and provide personnel with appropriate personal protective equipment
and safety training.
Connecting an
interlock switch
Follow the steps in
Procedure 6
to connect a safety door switch to the interlock
circuit of the laser.
Procedure 6 Connecting the door interlock circuit
Bus defeater
A bus defeater must be placed on the last device in the External bus chain
topology. In
Figure 56
the bus defeater is placed on the bus output connector of
a connected accessory.
Off
On
Logic Circuit
Laser Control Circuitry
Reset
Set
Normally
Open
Door
Switch
Interlock
Monitor
De-energized
External Bus
Connector
Koheras
ADJUSTIK
Bus Defeater
Shutdown Laser
Accessory
LEMO
Connector
Action
1 Install a switch that opens when the door accessing the laser installation enclosure is
opened. The switch must comply with safety regulations.
2 Using a cable with a maximum wire length of five meters and at a minimum 26 AWG,
connect the switch to a LEMO connector. For cable lengths longer than five meters, it is
recommended to use shielded cable.
3 Perform a continuity test using a multimeter:
•
First connect the multimeter leads to the interlock plug terminals.
•
Confirm when the enclosure door is closed, the meter shows the circuit as closed.
•
Confirm when the enclosure door opens, the meter shows the circuit as open.
4 Insert the LEMO connector into the LEMO interlock connector on the rear panel of the laser.
2