22
Chapter 5 Operation Guide
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
- 00h. Disconnected corresponds to 00h.
9
Latch
(Latches power setting into the laser by the rising edge)
10-15
Signal ground
16
，
21
Laser alarms
Pin16
Pin21
Situation
L
L
Out of the specified range of
operating temperature
L
H
Normal
H
H
MO abnormal
18
Master Oscillator(MO) signal:
- HIGH: MO on
- LOW or disconnected: MO off
19
Booster signal (ON/OFF input)
- HIGH: Booster on
- LOW or disconnected: Booster off
a 470 ohm resistor and a 47nF capacitor in parallel. This network is used to
balance the voltage difference between the ground and the laser case.
◎
According to the design, the ground of the control card may be connected to
the ground; otherwise, the ground of the control circuit is floating, indicating that
the blue and yellow-green wires of the 24VDC power cable of the laser are not
connected (see the red dotted line in the electrical connection diagram in this
chapter for details) .
