2. When the laser is a glass tube, this pin will be connected with
the laser power PWM end and used to control the power of the
laser.
The input port of water protector for the first laser power source.
When the water protector 1 is enabled, the mainboard will detect
the input port of water protector 1. If this port is of low level, it will
be deemed normal; if this port is of high level, the mainboard will
forcibly close the laser to suspend the work in progress and the
system will warn. If the water protector 1 is not enabled, the
mainboard will not detect the input port of water protector 1 and so
the water protector 1 can be unconnected.
Water protection input must be 24V logic level.
The analog signals for Laser Power. If Glass Tube is used, this pin
is recommended to control the power of the Laser.
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