Output Specifications - Renishaw RGH41 Installation Manual

Output specifications

Digital output signals - RGH41T, D, G, X, N, W, Y, H
Form - square wave differential line driver to EIA RS422A (except limit switch P, Q, Alarm E- and external set-up signal X)
†
Incremental 2 channels A and B in quadrature (90° phase shifted)
Model
Signal period P
RGH41T
RGH41D
Resolution S
RGH41G
RGH41X
RGH41N
RGH41W
A
RGH41Y
B
RGH41H
†
Reference
Synchronised pulse Z, duration as
resolution S. Repeatability of position
(uni-directional) maintained within
±10 °C from temperature at time of
phasing and for speeds <250 mm/s.
Z
For RGH41W, Y, H only Z pulse
re-synchronised at power-up with any
one of the quadrature states
(00, 01, 11, 10).
Limit open collector output, asynchronous pulse
Single limit (option 03/04)
Length of actuating magnet
Q
Repeatability
< 0.1 mm
†
Inverse signal not shown for clarity
RGH41 RGS40 installation guide
†
Alarm single limit readheads - differential line driven output
dual limit readheads - single ended line driven output
P (µm) S (µm)
40 10 20 ms
minimum
20 5
8 2
E
4 1
1.6 0.4
E- only on dual limit readheads
0.8 0.2
(option 05/06)
0.4 0.1
0.2 0.05
Set-up
5 (nom)
voltage at X
0
0 50%
Dual limit (option 05/06)
Repeatability
< 0.1 mm
P Q
Length of actuating magnet
For RGH41T, G, X alarm asserted
for signal amplitude <15 %.
Either asynchronous pulse E
as shown (options 03/05) or
line driver channels 3-state
(options 04-06).
For RGH41N, W, Y, H - alarm
asserted when:
- Signal amplitude >150%
- Readhead exceeds specified
maximum speed
Also, outputs are 3-stated at
signal amplitude <15%
Between 50% and 70%
signal level , X is a duty
cycle, 40 µm duration.
Time spent at 5 V increases
with signal level.
At >70% signal level X is
nominal 5 V.
signal level 70% 100%
Analogue output signals - RGH41A, B
Incremental 2 channels V and V differential sinusoids in quadrature
1 2
(90° phase shifted)
40 µm
0.6 to 1.2 Vpp
with Green LED
(V +) - (V -)
indication and
1 1
90° 120 Ω termination.
(V +) - (V -)
2 2
Reference 0.8 to 1.2 Vpp
Differential pulse V
Duration 126° (electrical).
Repeatability of position
(V +) - (V -)
0 0 -18° 108°
(uni-directional) maintained
0°
within ±10 °C from temperature
at time of phasing, and for
speeds <250 mm/s.
Limit open collector output, asynchronous pulse
Single limit RGH41B Dual limit RGH41A
Length of
actuating magnet
V
q
V V
p q
Repeatability
< 0.1 mm actuating magnet
Set-up
Between 50% and 70% signal level,
5 (nom) V
Time spent at 5 V increases with
Voltage
at V signal level.
X
At >70% signal level V
0
signal level 70% 100%
0 50%
-18° to 108° .
0
Repeatability < 0.1 mm
Length of
is a duty cycle, 20 µm duration.
X
is nominal 5 V.
X
11