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Chapter 5 Operation Guide
operate at the minimum specified PRR.
（3）The power setting can be changed during the laser operation by
applying updated values to pin 1-8 and latching them into the laser via pin
9. The laser will respond to the changes on the subsequent specified rise
time.
（4）If pins 18 and 19 are in LOW state, there is no laser radiation at the
operating wavelength.
（5）If the EE is ON, and the EM is OFF, there is a residual radiation at
the laser output. The value depends on the laser model and the operating
mode.
（6）If the EE is ON and the EM is ON with the zero power set (all pins
1-8 were LOW during the latching of the power into the laser) there is
a residual radiation at the laser output. The value depends on the laser
model and the operating mode.
（7）The red diode can be switched ON during laser operation (if the
option is installed) via pin 22. The guide laser should be turned ON when
the EE and EM pins are OFF. If either EE or EM is ON, the emission is
automatically stopped. To restart the laser operation it is necessary to
drop pins 18, 19 to LOW. Switching ON of EE and EM is available only
when the pin 22 is LOW.
（8）The optional red guide laser may be driven by either 24VDC or
5VDC.
（9）Make sure that pin 22 is connected to the ground or left floating if
the guide laser is not in use. Connection to the HIGH level disables laser
emission.
（10）The laser automatically switches OFF emission, if the module
temperature is beyond the specified range. The alarm signal combination
appears on the alarm pins 11, 12, 16 and 21. The laser will not resume the
emission unless the alarm signals are restarted. With regard to devices
with remote-controlled amplifiers, the alarm signal has something to do
