Wuhan Raycus Fiber Laser Technologies CO., Ltd.
20QS/30QS
Pulsed Fiber Laser User’s Guide V1
5
system with laser device, please make sure the connection is reliable before operating. Feet of
the DB25 are defined as follows in Fig. 5.
Figure 5. Connect port of controller
Table 3Definition of connect ports of controller
PIN No.
Name
Description
1-8 (D0-D7)
Power Setting
8 bit Parallel port;
D0 is minimum bit and D7 is maximum bit;
Range: 0-255 (hexadecimal: 0X00-0XFF); 0 is
minimum power and 255 is maximum power.
10,13-15,24-25
Ground
Digital GND
11,12,16,21
Laser alarms status
see alarm codes in the table below
17
VCC
+5V DC power supply input,
providing power for inside chips of DB25 to ensure
that the input and output signals are valid.
18
EE
Emission Enable (EE) signal.
HIGH: Emission Enable
LOW or disconnected: Emission Disable
19
EM
Emission Modulation (EM) input.
HIGH (>3V): Emission ON
LOW or disconnected (<1V): Emission OFF
20
Sync
Pulse Repetition Rate (Synchronization) input,
square wave.
22
Guide Laser signal
Guide Laser (red diode) ON/OFF input.
9,23
Obligate PIN
Reserved for Raycus only
a)
The pump current of diode laser and the laser output power are controlled by setting
the value of PIN1-PIN8 (TTL level). PIN1-PIN8 can be set from 0
～
255
，
corresponding to the laser output power from 0
～
100
％
(the actual laser power may
not be strictly linear with the setting value). The relationship between PIN value and
output power is shown in Table 4.
b)
PIN 17 is the external 5V input, providing power supply for alarm signal: input
current >20mA.
c)
The external input signal (PIN 1-8, 18-20, 22) are connected to the optical coupler
inside the system. Input voltage 3V-5V are defined as digital High, below 1V are
