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<< Click to Display Table of Contents > Gate, LaserA, LaserB |
  
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<< Click to Display Table of Contents > Gate, LaserA, LaserB |
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All 3 outputs can operate in opto-insulated mode. For this the LASER_Opto_VCC (pin 11) and LASER_Opto_GND (pin 30) must provide the supply. LASER_Opto_VCC may not exceed +5 V with respect to LASER_Opto_GND.
The polarity of the Laser_Gate, Laser_A and Laser_B outputs is selected with jumper JP3 as shown in figures 12 and 13.
Figure 12: Laser signal polarity active low (default) |
Figure 13: Laser signal polarity active high |
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During USC-1 startup and when the laser signals are disabled by software, the LaserGate, LaserA and LaserB will go into tri-state. It must be assured that the Laser defaults to a safe operation in this case. Potentially, a pull-up or pull-down resistor (about 4k7 ohm) has to be added to put the laser into a safe state. |
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For YAG style laser mode the output timing (active low mode) is as follows:
Figure 14: YAG laser control signals
The maximum output frequency for the LaserA and LaserB is 2 MHz, the period resolution is about 80 ns. The minimum output pulse width for LaserA and LaserB is about 167 ns.
