THORLABS LDM9LP, Руководство по эксплуатации

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Pigtailed Laser Mount Chapter 6: Making Safety Interlock Connections
Rev C, September 5, 2018 Page 17
Making Safety Interlock
Connections
The LDM9LP is equipped with a Remote Interlock connector located on the side
panel. In order to enable the laser source, a short circuit must be applied across
the terminals of the Remote Interlock Connector. In practice this connection is
made available to allow the user to connect a remote actuated switch to the
connector (i.e., an open door indicator). The switch, which must be normally
open, has to be closed in order for the unit to be enabled. Once the switch is in
an open state, the laser diode must automatically shut down.
All units shipped from Thorlabs are configured with a shorting 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
in the procedures in this manual. If you wish to make use of the interlock feature,
you will need to acquire the appropriate connector mate and wire it to your
remote interlock switch. Next, remove the shorting device by unscrewing it from
the input and install the connector into the interlock input.
The interlock input only accepts a 2.5 mm mono phono jack. This connector is
readily available at most electronics stores (Radio Shack, Digikey, Mouser,
Allied, etc.).
The electrical specifications for the interlock input are as follows:
Specification Value
Type of Mating Connector 2.5 mm Mono Phono Jack
Open Circuit Voltage +5 VDC with Respect to Chassis Ground
Short Circuit Current ~8 mA DC
Connector Polarity Tip is +5 V, Barrel is Ground
Interlock Switch Requirements Must be N.O. Dry Contacts. Under no
circumstances should any external
voltages be applied to the Interlock Input
Remote Interlock Connector