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Chapter 5 Operation Guide
（3）Pin 9 is the “Latch” control line to store power settings (pin1-8) into
the laser. The data is stored to the laser by the rising edge of the signal
on the pin 9. Data on the pins 1-8 should be stable for 1us before and 1us
after the rising edge on pin 9. Stability of the data on the Pin 1-9 out of the
above mentioned time frames is not required. Maxphotonics recommends
supplying single positive pulse with duration longer than 2us to latch the
data into the laser. Time interval between adjacent latching pulses should
be longer than 100us (latching frequency less than 10kHz).
（4）Pins 11, 12, 16 and 21 are the alarm and status outputs. Pin 11 and
12 is reserved for future alarm codes expansion. These pins indicate the
following device states:
Pin12
Pin11
Pin16
Pin21
Alarm description
Χ
Χ
L
L
Temperature alarm Laser temperature is
beyond the operating temperature range.
Χ
Χ
H
L
PD Alarm
Χ
Χ
L
H
Normal Operation
Χ
Χ
H
H
PD Alarm
CAUTION：
◎ In the case of any alarm the laser will be automatically switched OFF
and sets internal Alarm flag. To continue operation after alarm event the
internal Alarm flag should be reset. To reset Alarm flag pin 18 and 19 should
be set to LOW. Alarm outputs (pins 11, 12, 16 and 21) will be recovered to
the normal state simultaneously with the reset of Alarm flag signal (except
Back Reflection alarm).
◎ Back reflection alarm: Alarm flag may be dropped when at least one
second passes after the alarm activation. If reset was done earlier, the
flag will be dropped when 1 second passes after alarm activation.
◎ Laser is not ready for emission state: Laser is not ready to emit power.
That may be a result of Emergency Stop and Guide Laser activation
without following reset or external power supply voltage out of specified
range.
