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Chapter 5 Operation Guide
◎ Laser GND (DB-25 pin 10-15,24) and laser 24VDC return (BLUE CABLE) are
connected inside the laser module. No connections are allowed between
these terminals outside of the laser module.
◎ Inside the module the common ground is connected to the laser
housing via 470 Ohm resistor and parallel 47nF capacitor. This network is
utilized to balance the differential pressure between GND and the laser
shell.
◎ User controller electronics ground may be connected to the earth by
design (dashed red line on the diagram). If there is no such connection, it
should not be intentionally made.
2-Control Connector Pin Assignment, DB-25 Plug
1.Pin Function
All control pins are TTL compatible, unless otherwise noted in the pin
description. For the interface designs level ranges of the TTL standard
should be taken into consideration.
Pin# Description
1-8（D0-D7）
1.Power setting (16-bit bus. 0-FFh in hexadecimal or
0-255 in decimal formats).
2.Least significant bit (lsb) (D0) corresponds to Pin
number 1, Most significant bit (msb) (D7) corresponds
to pin 8.
- 00h(0): Minimum output power
- FFh(255): Maximum output power
- Disconnected corresponds to 00h.
2. PWM (pulse-width modulation)Communication
interface Control Bus is DB25.22,Refer to -5.5 Pulse
duration Set
D1：Data Bus
D2： Timing Bus
Other reserves
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