29
Chapter 5 Operation Guide
with the temperature of the controlling head.
（11）The laser has an internal back reflection sensor. It switches
the emission OFF if there is enough reflected light which is potentially
dangerous for the laser. The internal Alarm flags is set and the appropriate
alarm signal combination appears on the alarm pins 11, 12, 16 and 21. The
laser does not resume the emission and holds the alarm pins unchanged
until the Alarm flag is reset. It is possible that the EE and EM are switched
ON again in one second after the alarm was emerged.
（12）If the temperature of the laser module exceed a specified value,
+45 ℃ for example, the laser will be automatically switched OFF and the
alarm signal will appear on pins 16 and 21. Even if the temperature drops
back under +45 ℃ , the laser will not resume the emission and the alarm
pins remain unchanged until the main power supply (24VDC) is turned off.
4-Cut-off Power Frequency
Recommend high speed galvanometer.
MFPT-20H/MFPT-20S Cut-off Power Frequency
满功率电流
降功率频率
电流（
mA
）
频率
(KHz)
current
(mA)
Full-
power
current
Cut-off power
frequency
frequency(KHz)
