11
Output specifications
Digital output signals - type REF digital output interfaces
Form - Square wave differential line driver to EIA RS422A
Incremental
†
2 channels A and B in quadrature (90° phase shifted)
RGH25F RGS20 installation guide
†
Inverse signals not shown for clarity
Asynchronous pulse Q
NOTE:
RGH25F readheads and REF interfaces are available
with reference mark or limit switch detection.
Actuation device A-9541-0040/A-9531-0251
Set-up
Setup signal voltage proportional to signal amplitude
Repeatability of position (uni-directional) maintained within
±10 °C from installation temperature and for speed <250 mm/s
Actuation device A-9541-0037/A-9559-0650
NOTE:
Wide reference mark option useful when using long cable
lengths and/or high speed operation to overcome effects of skew
Voltage
at X
1
100%
0
0
Signal level
Z
Synchronised pulse Z,
duration as resolution
Synchronised pulse Z,
duration as signal period
Z
A
B
Signal period
Resolution
Limit
†
Q
Length of actuating magnet
Repeatability <0.1 mm typical
Model
P
(µm)
S
(µm)
REF0004
20
5
REF0020
4
1
REF0040
2
0.5
REF0100
0.8
0.2
REF0200
0.4
0.1
REF0400
0.2
0.05
REF1000
0.08
0.02
REF2000
0.04
0.01
REF4000
0.02
0.005
Alarm
†
Alarm asserted when:
- <20% signal amplitude
- >135% signal amplitude
- Readhead exceeds specified maximum speed
- Signal offset excessive
NOTE:
3-state alarm option also available
20 ms
minimum
E
Asynchronous pulse E
Reference
†
Wide reference
†
(option C)