© 2015 Thorlabs
1 General Information
5
1.1 Laser Diode Protection Features
·
Soft start function
The soft start function protects the laser diode against undesired transients by smoothly
increasing the injection current after switching the laser on. This current ramp last for abt.
200 msec.
·
Adjustable limitation of laser current
An adjustable hardware limit for the laser current can be set using the 12 turn potentiometer
at the front panel. This protects the laser diode from unintentional laser current values.
·
Contact protection of the laser diode (open circuit)
If the connection to the laser is interrupted during operation even for a very short time, the
output is switched off immediately and can be switched on manually only.
·
Electronic short-circuit for the laser diode in LASER OFF mode
With the output switched off the laser diode is short-circuited electronically, thus the laser
diode is protected against accidental ESD and induced current transients.
·
Line failure protection
The laser current is switched off immediately if a power failure or line interruption occurs. In
this case, same as after turning on the controller, the laser current remains switched off and
can be switched on manually only.
·
Interlock
The interlock interface provides a number of several protection functions simultaneously.
-
Safety lock to prevent unintentional use
-
Cable disconnect or damage monitoring
-
An external emergency switch can be connected
-
Application of external automatic protection and alerting equipment
-
External LED to indicate “Laser ON”
The laser can only be switched on with the interlock input closed. If the interlock contact is
opened during operation (even for a very short time) the output is switched off immediately and
can be switched on manually only.
1.2 Safety
Attention
All statements regarding safety of operation and technical data in this instruction manual will
only apply when the unit is operated correctly as it was designed for.
All modules must only be operated with proper shielded connection cables.
Only with written consent from Thorlabs may changes to single components be carried out or
components not supplied by Thorlabs be used.
This precision device is only serviceable if properly packed into the complete original packaging
including the plastic foam sleeves. If necessary, ask for a replacement package.
Before applying power to your LDC200C Series controller, make sure that the protective
conductor of the 3 conductor mains power cord is correctly connected to the protective earth
contact of the socket outlet!
Improper grounding can cause electric shock with damages to your health or even death!
Also make sure that the line voltage setting of the fuse holder at the rear panel agrees with your
local supply and that the corresponding fuses are inserted. If not, please change the line
voltage setting (see section
) and the mains fuses (see section
).
The LDC200C Series controller must not be operated in explosion endangered environments!
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