THORLABS LM14S2, Руководство пользователя

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Butterfly Laser Diode Mount Chapter 6: Safety Interlock Connections
Rev E, May 8, 2018 Page 11
Chapter 6 Safety Interlock Connections
The LM14S2 is equipped with a Remote Interlock Connector located on the side panel. In order to enable the
laser driver, 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 (when used in conjunction with
Thorlabs drivers)
Short Circuit Current 10 mA DC (Typical)
Connector Polarity Tip is Positive, 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
Figure 7 Remote Interlock Connector