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Chapter 5 Operation Guide
（9）Pin 23 is the “Emergency stop” input. It should be set to HIGH
for normal operation. In case of dropping this pin to LOW state (even for
a short period) the laser automatically switches OFF (similar state when
both EE and EM are OFF) independently of other control signals. It is
necessary to drop both Pin 18 and Pin 19 prior to restarting the laser.
Until the restarting is done state “Laser is not ready for emission” will be
active on appropriate alarm/status pins. Pin 23 should be set to HIGH at
least 2us before applying ON signals to EE and EM pins.
3-Laser Operation Using Digital Interface
1 .Operation Steps
（1）Remove the protection cap from the laser output optical head.
（2）Connect the laser module to the control system via DB-25 connector.
Use pins according to the description above. Refer to 5.2.2 Digital Control
Interface (DB-25) Description.
（3）Recommended initial state of control pins:
Pins 18,19,22 LOW
Pin 23 HIGH
Pin 20 With repetition rate within the specified range
（4）Connect power supply sources to the laser as described above.
（5）In 10 seconds after supplying +24V voltages (warm-up time) the
laser is ready for operation.
CAUTION :
◎ It is allowed to supply +24V or +5V Housekeeping voltage before
initialization of the control signals.
（6）Set desired power via pin 1-8. Apply the latch pulse to the pin 9 to
store the power settings into the laser.
