.
User’s guide Ytterbium Pulsed Fiber Laser RFL-P20QB
～
P30QB Ver.: 2.0
6
9,23
Obligate PIN
Reserved.
(1)
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:
Table 5. Definition of power control PIN value.
Setting 1 Setting 2 Setting 3 Setting 4
PIN 1
0
0
0
0
PIN 2
0
0
0
0
PIN 3
0
0
0
0
PIN 4
0
0
0
0
PIN 5
0
0
0
1
PIN 6
0
0
1
1
PIN 7
0
1
1
1
PIN 8
1
1
1
1
Current
~50 %
~75 %
~87.5 % ~93.75 %
(2)
PIN 17 is the external 5V input, providing power supply for alarm signal: input current
＞
20mA.
(3)
The external input signals (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 defined as digital
Low.
(4)
Alarm setting: Pins 11, 12, 16 and 21 are the alarm and status outputs which driven by +5V
power from Pin 17. Pin 12 is reserved (always be high). These pins indicate the following
device states.
Table 6. Definition of alarm states.
PIN 12
PIN 11
PIN 16
PIN 21
Alarm item
×
Low
Low
Low
Temperature alarm
×
Low
Low
High
Normal
×
Low
High
Low
Obligate alarm
×
Low
High
High
System alarm
×
High
Low
Low
Supply voltage
