4.4. SAFETY INTERLOCKConnect interlock pin through user safety trip mechanism or emergency stop button. In order to enable laser operation, interlock pins should be electrically shorted through proper safety mechanism. Once the interlock connector terminals are tripped (open), laser will lose DC power immediately, disabling lasing and communication. Laser will recover from interlock event when interlock is shorted again. In the event the interlock was tripped during emission, lasing will not commence at recovery without reasserting emission commands by user. See below diagram of interlock internal connection.4.8. POWER CORD DISCONNECTION PROCEDUREBefore removing the DC power cord, the following steps should be done:1. Switch Laser to Standby mode (ARM=O or TTL pin 18 low).2. Reduce system gain to 0 (IGAIN=0)3. Remove Interlock connector.After the above steps have been performed DC power cord can be safely removed. It is always best to turn off the AC power outlet before disconnecting the power cord between the DC power supply and Laser Engine.