Wuhan Raycus Fiber Laser Technologies CO., Ltd.
P20QB/P30QB
Pulsed Fiber Laser User’s Guide V2.1
5
3.
Control Interface
There are DB9 and DB25 interfaces at the rear of the laser. The DB9 is a RS232 interface
only used for debugging, no needs to connect. And DB25 is the joint interface connecting control
system to the laser system, please make sure the connection is reliable before operation. Feet of
the DB25 are defined as follows in Fig. 5.
Figure 4. Connect port of controller.
Table 4 Definition of connect ports of controller.
PIN No.
Name
Description
1-8 (D0-D7)
PowerSetting
8 bitsparallel port,
D0 is minimum bit and D7 is maximum bit;
Range: 0-255 (hexadecimal: 0x00-0xFF);
10,13-15,24-25
Ground
Digital GND.
11,12,16,21
Laser alarms status
See alarm codes in Table 4
17
VCC
+5V DC power supply input,
providing power for inside chips of DB25 to
ensure that the input and output signals are valid.
Input current >20mA
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.
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
