Laser LS8000-3 QF Warning Output, Shutter Open, Laser On, Thermostat Output, Light Stack Green

LaserSpeed 8000-3 Instruction Handbook

RS-232/RS-422 Communication

QF Warning Output

This output indicates when the QF has decreased below a threshold. This can be used as a warning indicator to alert the user that the optics window may need to be cleaned, or other maintenance may need to be performed. The QF threshold is configured with the & command, and the QF Warning Timeout is configured with the < command.

Voltage High: QF is below threshold

Voltage Low: QF is at or above threshold

Shutter Open

Indicates if the beam shutter is open or closed. This is the same as the Shutter Open status bit in the serial output message.

Voltage High: Beam Shutter is Open

Voltage Low: Beam Shutter is Closed

Laser On

Indicates if the gauge is emitting laser radiation. This is the same as the Laser On status bit in the serial output message, and the Laser On LED.

Voltage High: Laser is On

Voltage Low: Laser is Off

System Ready

Indicates if the gauge is ready for operation. This status bit is on if all the following conditions are met:

•Laser is On – Laser Interlock (Pin 16) must be connected Signal Ground (Pin 11, 19, or 21)

•Beam Shutter is Open – Shutter Interlock (Pin 17) must be connected to Signal Ground (Pin 11, 19, or 21)

•Laser is at temperature

Thermostat Output

This output can be used to regulate the gauge temperature by using it to control a valve for coolant. This output turns on when the internal gauge temperature increases above 40ºC, and turns back off when the internal temperature decreases below 35ºC.

Voltage High: LS8000-3 Temperature > 40ºC (Turn on coolant)

Voltage Low: LS8000-3 Temperature < 35ºC (Turn off coolant)

Light Stack (Green)

This output can be used to drive a solid-state relay to turn on the green light in a light stack. The green light is illuminated when the laser interlock is open, indicating that the LS8000-3 is not emitting laser radiation. See the Light Stack Interface section for details.

Voltage High: Green lamp should be illuminated

Voltage Low: Green lamp should not be illuminated

Length Threshold A

Part No. 93463 / Drawing No. 0921-01561 Page 141 of 221 Revision A (Sep 2007)