Panasonic HL-D3 Series User Manual page 25

Preface
External Control of Laser Radiation
The laser control input terminal can be used as the external stop circuit of
laser emission.
It stops each sensor head independently.
The laser can be stopped by opening the LSA terminal (or LSB terminal) and
the (-) terminal.
In the default condition, the laser control terminal has a short bar for
short-circuiting.
When the external control function for laser emission is used, remove the
short bar for wiring.
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