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QCL500, QCL1000, QCL1500 Low Noise Quantum Cascade Laser Drivers
PAGE 9
QCL1500-00400-D
OPERATING PROCEDURES, continued
2. Confi gure control for Local Only, Local & Isolated Remote, or Local &
Grounded Remote. Wire Remote Signals.
The Remote Power On and Remote Enable signals interact with the onboard switches. A DIP switch
on the bottom of the board confi gures the interaction. Factory default is Local Only.
To access the DIP switch, remove the seven screws attaching the baseplate to the shield. Use
the mounting tabs to lever the baseplate off the shield. The fi t is deliberately tight. Note that the
components are Electro-static Discharge (ESD) sensitive. Make these changes in an ESD safe zone.
Remove 7 screws
The switch location is given in Figure 10:
If you will be using the REMOTE inputs, wire them now. TTL compatible, up to 12 V.
Pin 3 Remote Power On -, Pin 4 Remote Power On +
Pin 5 Remote Enable -, Pin 6 Remote
STATE
Local Only
All switches to right or ON
FACTORY DEFAULT
Local Plus Isolated Remote
All switches to left or OFF
Local Plus Grounded Remote
Swith 1 & 3 OFF
Switch 2 & 4 ON
SWITCH POSITION
INTERACTION
Remote inputs are ignored. Local Switches only.
If either Remote Signal or Local Switch is OFF or
disabled, Power is OFF or Current is DISABLED.
Remote signal is optically isolated. Wire to
Remote Power ON - & + and Remote Enable - & +.
If either Remote Signal or Local Switch is OFF or
disables, Power is OFF or Current is DISABLED.
Remote signal negative is tied to ground. Wire to
Remote Power + and Remote .
1
2
3
4
ON
OFF
1
2
3
4
ON
OFF
1
2
3
4
ON
OFF
Figure 9
Access to switches
Figure 10
Switch location
If you prefer a different default
from the factory, please contact
us at 406-587-4910 or
[email protected]