Output specifi cations
Digital output signals - type REF digital
Form - Square wave differential line driver to EIA RS422A
Incremental
✝
2 channels A and B in quadrature
(90° phase shifted)
Analogue output signals - type REF0000
Form - 1 Vpp differential
Incremental
2 channels V
1
and V
2
differential sinusoids in quadrature
(90° phase shifted)
90°
20 µm
1 Vpp (nominal) with AGC active
Differential pulse V
0
-18° to 108°.
Duration 126° (electrical).
Repeatability of position
(uni-directional) maintained within
±10 °C from installation temperature
and for speed <250 mm/s
Reference
(V
1
+) -(V
1
-)
(V
2
+) - (V
2
-)
Limit
Limit
✝
Alarm
✝
Repeatability <0.1 mm typical
Length of actuating magnet
Q
NOTE:
RGH20F readheads and REF
interfaces are available with reference
mark
or
limit switch output.
Select output option at order.
Asynchronous pulse Q
Asynchronous pulse V
q
Length of actuating magnet
(V
q
+) - (V
q
-)
NOTE:
RGH20F readheads
and REF interfaces are
available with reference mark
or
limit switch output.
Select output option at order.
Voltage at
V
X
/X
1
100%
0
0
Signal level
Set-up signal voltage proportional to signal amplitude.
Set-up signal - all REF interfaces
NOTE:
3-state alarm options also available for REF digital interfaces.
20 ms
minimum
E
Asynchronous pulse E
✝
Inverse signals not shown for clarity.
108°
-18°
(V
0
+) - (V
0
-)
0°
1 V
Repeatability of position (uni-directional) maintained within ±10 °C from
installation temperature and for speed <250 mm/s.
NOTE:
Wide reference mark option useful when using long cable lengths
and/or high speed operation to overcome effects of skew.
Signal period
Resolution
A
B
Z
Z
Synchronised pulse Z,
duration as resolution
Synchronised pulse Z,
duration as signal period
Wide reference
✝
(
option C)
Reference
✝
SECTION
2 - RGH20F/REF systems
(continued)
Repeatability
<0.1 mm typical
1 V
Depending on REF alarm option,
alarm asserted when:
- 20%> signal amplitude >135%
- Readhead exceeds specifi ed maximum speed
- Signal offset excessive