Chapter 3 Laser Diode Driver Operation 19
3.2 Laser Safety Features
3.2.1 Conditions Which Can Automatically Shut Off the Laser
Output.
•
Laser Open Circuit
7
•
Laser Compliance Voltage Limit
7
•
Laser Hard Current Limit
7
•
Laser Interlock State Changed
7
•
Laser Photodiode High Current Limit
•
Laser Photodiode High Power Limit
•
Laser Intermittent Contact (if enabled, default disabled)
Clearing the appropriate bits in the Laser OUTOFF register can disable some
of these conditions. See
Computer Interfacing Manual
for more
information.
3.2.2 Key switch interlock
The keyswitch, located on the back panel of the 5600, will shutoff, or not
allow to be turned on, the laser output while in the OFF position, per CDRH
requirements.
7
This condition will always shutdown the laser output, and cannot be disabled.
PD Anode
.1 uF
.01 uF
LD Anode
LD Cathode
PD Cathode
EGND
LDD Connector
.1 uF
LD PD
1
2
3
3.5 uH Ferrite Beads
Mouser P/N 542-FB73-287
Figure 8 - Laser Diode Protection Circuit
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
To Next Page
Loading...
