Ocean Optics MMS Raman - Manual (Page 27)

Appendix C
Remote Interlock
The laser activation request signal passes through the Remote Interlock, a 0.25” phone jack on the panel
of the spectrometer. The Remote Interlock feature has been designed to pass this signal with no plug
inserted into the jack. An unwired plug (0.25” phone plug, 3 conductor type: Tip, Ring, and Shield,
provided) inserted into the jack opens this signal path. The spectrometer processor will no longer receive
the activation request and will stop sending the activation signal to the laser controller, shutting off the
laser. This will also cause the Laser On LED to turn off.
Connecting the Tip and Ring conductors of the plug to the normally closed (NC) contacts of an external
user-specified switch maintains the laser activation request signal path when the plug is inserted into the
Remote Interlock jack. Opening the external switch contacts disables the laser.
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