@2021 Raycus Corporation
9
Figure 8: Interface circuit of input signal
Signal input needs to be able to provide at least 7 mA of current. Interface circuit of output
signal from DB25 is shown in Fig. 9.
Figure 9: Interface circuit of output signal
i)
Introduction of laser pulse duration control
Pin2, 3, 16 and 22 on DB25 port not only used for the foundation control of the laser
machine, but also achieves the pulse duration control as the extender.
Table 7 PIN Definition of Serial Communication
Pin
Name
Description
2
Serial input
The setting of the data bits synchronize with rising edge of the
serial clock.
3
Serial clock
Serial clock, frequency range: 10KHz
～
100KHz.
14
GND
Digital GND
16
SO
The output data bits synchronize with rising edge of the serial
clock.
22 Pulse duration control Enable
High
：
Enable
，
Pin2 and Pin3 control the pulse duration;
Low or disconnected
：
Disable
Table 8 Command format of setting the laser pulse duration
Frame
（
1byte
）
Command word (1 byte)1
Pulse duration(2byte)ns
0xA5
0x01
Big Endian
Table 9 Response format of setting the laser pulse duration
Frame
（
1byte
）
Pulse duration(2byte)ns
0xA5
Big Endian
