L-9517-9563-06-A_Data_sheet_ATOM_en.pdf - 第27页
27 A TOM miniature encoder system V oltage at V X 3.3 V (nom) 50% 70% 100% 0 0 Signal lev el Between 50% and 70% signal le vel, V X is a duty cycle. Time spent at 3.3 V increases with incremental signal lev el. At >…
26 ATOM miniature encoder system
Incremental 2 channels V
1
and V
2
differential sinusoids in quadrature, centred ~ 1.65 V (90° phase shifted)
Bi-directionally repeatable.
1
Differential pulse V
0
centred on 45°.
Reference
(V
0
+)−(V
0
−)
360° (nom)
0.7 to 1.35Vpp with green LED indication
(readhead) and 120R termination.
40 / 20 µm
(V
1
+)−(V
1
−)
(V
2
+)−(V
2
−)
0°
(after CAL)
45°
1Vpp
Differential signals V
0
+ and V
0
− centred on ~ 1.65V.
Output specications
Analogue output signals
All ATOM readheads and Ri and Ti analogue interfaces
1
Only calibrated reference mark is bi-directionally repeatable.
27 ATOM miniature encoder system
Voltage at V
X
3.3V (nom)
50% 70% 100%0
0
Signal level
Between 50% and 70% signal level, V
X
is a duty cycle.
Time spent at 3.3V increases with incremental signal level.
At >70% signal level V
X
is nominal 3.3V.
Set-up
During normal operation
Voltage at V
X
Normal operation Normal operationReference
mark
calibration
3.3V
1.65 V
0 V
Start of
calibration
routine
End of
incremental
calibration routine
End of
calibration
routine
Incremental
calibration
>70% signal
During CAL routine
>70% signal
28 ATOM miniature encoder system
Incremental
1
2 channels A and B in quadrature (90° phase shifted)
Reference
1
Signal period
Resolution
A
B
Z
Synchronised pulse Z, duration as resolution.
Bi-directionally repeatable.
2
Digital output signals
Form - Square wave differential line driver to EIA RS422A
All ACi interfaces, Ri digital interfaces, and Ti digital interfaces
1
Inverse signals not shown for clarity.
2
Only calibrated reference mark is bi-directionally repeatable.