53
XL80 laser system
Slow trigger
The XL laser is triggered using a noisier trigger signal; for example, from a
relay or switch as shown opposite� This signal is applied to the slow trigger
pin of the auxiliary I/O port� The time delay between the leading edge of the
trigger pulse and the instant the laser reading is received is longer than the
fast trigger mode�
Slow trigger specifications
Active edge
Falling
Minimum pulse width
5 ms
Switch debounce
< 20 ms
Trigger delay
8 ms
Maximum input voltage
±12 V
Open
Closed
Active pulse width > 5 ms
Active edge: position sampled here
Switch bounce < 20 ms will be ignored
Pin 17
Slow trigger input
Pin 15
Trigger input protected
to ± 12 V DC
TTL
10 K
0 V
+3.3 V
Figure 2
Electrical interface for slow triggering�
