Chapter 6 Making Safety Interlock Connections - THORLABS SPDC810N User Manual

Narrowband Photon Pair Source Chapter 6: Making Safety Interlock Connections
Chapter 6 Making Safety Interlock Connections
The SPDC810N is equipped with a remote interlock connector located on the rear panel. In order to enable the
pump laser, a short circuit must be applied across the terminals of the Remote Interlock connector. This
connection is made available to allow the user to connect a remotely actuated switch to the connector (i.e. an
open door indicator).
The switch that is connected to this interlock must be normally open (N.O.), meaning that it has to be closed in
order for the unit to be enabled. If the switch is changed to an open state, the pump laser will automatically shut
down. If the switch returns to a closed condition, the pump laser will not re‐enable until the ENABLE switch is
pressed.
All units shipped from Thorlabs are configured with a shorting BNC device installed in the interlock connector. If
you are not going to use this feature then you can leave the shorting device installed and the unit will operate
normally, as described throughout this manual. If you wish to make use of the interlock feature, you will need to
acquire the appropriate mating connector (BNC male) and wire it to your remote interlock switch.
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