XL80 laser system
62
www.renishaw.com/xl80
Open
Closed
Active pulse width > 5 ms
Active edge
Switch bounce < 20 ms will be ignored
Datum input
Pin 16
Pin 17
Datum input protected
to ± 12 V DC
TTL
10 K
0 V
5 V
Figure 9
Electrical interface for clear error / datum�
The analogue output can also be datumed by breaking and then unbreaking
the laser beam�
Electrical performance specification
Output voltage range
±5 V
Accuracy (over ± 4�5 V range)
±2% of full scale
Rollover limit
±40 mm
Noise
±1% of full scale
Environmental compensation
None
Update rate
10 MHz
Propagation delay
< 4 µs
Maximum measured frequency
100 KHz
Transmission distance
3 m
DAC resolution
14 bits
