20
QUANTiC RTLC40 /
FASTRACK
installation guide
Output specifications
Limits
Open collector output, asynchronous pulse
(Not available with ‘A’ cable termination)
Repeatability < 0.1 mm
~ Length of limit actuator
P Q
Active high
Incremental
* 2 channels A and B in quadrature (90° phase shifted)
Signal period P
Resolution S
A
B
Z
Reference*
Synchronised pulse Z, duration as resolution.
Bi-directionally repeatable.
†
Alarm
Line driven
(Asynchronous pulse)
(Not available with ‘A’ cable termination)
Resolution
option code
P (µm)
S (µm)
T
40
10
D
20
5
X
4
1
Z
2
0.5
W
0.8
0.2
Y
0.4
0.1
H
0.2
0.05
E−
or 3-state alarm
Differentially transmitted signals forced open circuit for > 15 ms when alarm conditions valid.
Alarm asserted when:
–
Signal amplitude < 20% or > 135%
– Readhead speed too high for reliable operation
> 15 ms
NOTE:
A wide reference mark option, outputting
a reference pulse for the duration of the signal
period is available. Contact your local Renishaw
representative for more information.
Digital output signals
Form – Square wave differential line driver to EIA RS422A (except limits P and Q)
Analogue output signals
Incremental
2 channels V
1
and V
2
differential sinusoids in quadrature, centred on ~
1.65 V (90° phase shifted)
40 μm
(V
1
+)−(V
1
−)
(V
2
+)−(V
2
−)
Reference
0°
(V
0
+)−(V
0
−)
45°
360° (nom)
0.8 to 1.2 Vpp
Bi-directionally repeatable.
†
Differential pulse V
0
centred on 45°.
V
P
V
Q
Repeatability < 0.1 mm
~Length of limit actuator
Active high
Limits
Open collector output, asynchronous pulse
Set-up
‡
Voltage
at V
X
3.3 V (nom)
50%
70%
100%
0
0
Signal level
Between 50% and 70% signal level, V
X
is a duty cycle.
Time spent at 3.3 V increases with incremental signal
level. At > 70% signal level V
X
is nominal 3.3 V.
*
Inverse signals not shown for clarity
†
Only calibrated reference mark is bi-directionally repeatable
‡
Set-up signal as shown is not present during calibration routine
0.7 to 1.35 Vpp with Green LED (AGC off)
and Blue LED (AGC on) indication
(readhead) and 120R termination.