Canon ir2016, ir2020 マニュアル

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Chapter 2
2-11
F-2-26
2.7.2 Protection Function
0010-1706
24 VDC lines connected to motors are provided with fuses for overcurrent protection. 
The 24 DVC line connected to the host machine is provided with a fuse (FU1) and the 13 VDC line connected to the logic circuit is also provided with a fuse (FU2)
for overcurrent protection. 
M5
M4
M3
M2
M1
24V
5V
24V
5V
3.3V
5V
CW/CCW
PWM
A/B
lref
CW/CCW
PWM
A/B
A/B
lref
lref