@2021 Raycus Corporation
6
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 Table 4.
Figure 6 Pin definition of DB25 control interface
Table 4 Definition 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).
10,14
Ground
Digital GND.
11,12,16,21
Laser alarms status
see alarm codes in Table 5.
17
VCC
+5VDC power supply input.
Providing power for inside isolate chip of DB25 to
ensure that the input and output signal are valid.
18
EE
Emission Enable (EE) signal.
HIGH(>4.5V): Emission Enable
LOW or disconnected (<1V): Emission Disable
19
EM
Emission Modulation (EM) input.
HIGH (>4.5V): Emission ON
LOW or disconnected (<1V): Emission OFF
20
Sync
Pulse Repetition Rate (Synchronization) input, square
wave.
23
Emergency Off
Emergency Switch Off(Enable: 5V TTL)
9
Obligate Pin
Reserved
a)
The pump current of the 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 to 255
，
corresponding
to the laser output power from 0 to 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 5.
b)
Pin 10 and Pin 14are all digital GND.
