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Chapter 5 Operation Guide
CAUTION :
◎ The MO should be switched ON at least 5ms earlier than the BS is
switched ON. The laser does not start to emit if you switch the BS ON while
the MO is LOW/OFF.
◎ If the MO is switched ON later than the BS is switched ON, the laser
will emit about 1ms later than the switching of the MO. It is abnormal
operation which should be avoid and not listed in the user guide. The BS
switches ON simultaneously with the rising edge of the signal applied to
the pin 19.
(6）Pin 20 is the Synchronization input. Pulse train with a repetition rate
(PRR) within specified operating range should be applied to the pin 20
(refer to the optical specification for PRR limits). The laser emits pulses
simultaneously with the rising edge of the signal.
CAUTION：
◎ If the PRR is out of the specified range (or no PRR signal is supplied) the
laser safety circuit will substitute the missing pulses or limit the PRR.
◎ The laser emission is not allowed simultaneously with the guide laser.
The BS is blocked internally during the guide laser operation. If pin 19 is set
HIGH but the guide laser is on, the laser will not emit light, unless the guide
laser is switched OFF. The MO is able to be switched ON or OFF during the
guide laser is ON.
(7）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 of time), the laser automatically switches OFF (similar to the
state when both MO and BS are OFF). It is necessary to drop both MO and
BS to LOW (if they were HIGH) before restarting the laser.
（8）Digital signal input/output connection
Sketched circuit diagram of input interface
