Wuhan Raycus Fiber Laser Technologies Co., Ltd.
User Guide of RFL-P500
18
b)
Pin 17 is an external 5V power input, which supplies power to the output
optocoupler of the alarm signal; the input current is more than 20mA.
c)
The external input signals (Pin 1-8, 18, 19, 20, 22) of the laser are all
connected with optocouplers inside the system to ensure that the input level
is high in the range of 3.3V-5V and low in the range of 1.7V. Pin input
current is greater than 7 mA.
d)
Warning Signal Definition:
Table 8 Warning Signal Definition
12PIN
11PIN
16PIN
21PIN
Alarm item
X
Low
Low
Low
Temperature alarm
X
High
Low
Low
Power failure
X
Low
Low
High
Normal
X
High
Low
High
Device not ready
X
Low
High
Low
Laser High Reflection Warning
X
Low
High
High
System failure
X
High
High
Low
Spare
X
High
High
High
Spare
e)
Laser warning output signals (PIN11,16,21) are all connected with
optocouplers, and 17 pins 5V power supply is needed to get an effective
signal.
f)
Note: The pre-output light signal (needle 18) must be at least 5 ms earlier
than the output light signal (needle 19), otherwise the laser will be damaged
easily.
Schematic diagram of input signal interface circuit
：
Figure 9: Schematic diagram of input signal interface circuit