Output Specifications - Renishaw T101 Installation Manual

Output specifications

Digital output signals
Form – Square wave differential line driver to EIA RS422A (except limits P and Q)
Incremental …
2 channels A and B in quadrature (90° phase shifted)
Signal period
Resolution
A
B
Reference …
Z
Wide reference …
Z
NOTE: Select 'standard' or 'wide' reference at time of ordering, to match the requirements of the controller being used.
Wide reference mark not available on Ti0004 interfaces.
Limits Open collector output, asynchronous pulse
Digital Ti interfaces only
Active high
Repeatability
<0.1 mm
P Q
Length of limit actuator
NOTE: No limits on TD interfaces. P limit becomes E+ for options E, F, G, H.
Alarm …
Asynchronous pulse
Line driven >15 ms
E
Alarm asserted when signal level is less than 20% or
greater than 135%. Alarm is also asserted if readhead
speed is too high for reliable operation.
E- output only for Ti options A, B, C, D
or 3-state alarm
Differentially transmitted signals forced open circuit for
>15 ms when alarm conditions valid.
TONiC RSLM/RELM installation guide
Bi-directionally repeatable pulse Z, duration equal to the resolution
Bi-directionally repeatable pulse Z, duration equal to the signal period
or Active low
Repeatability
<0.1 mm
P Q
Length of limit actuator
Set-up *
1
Voltage
at X
0
0 Signal level 100%
Set-up signal voltage proportional to incremental signal amplitude
Analogue output signals
Incremental 2 channels V and V differential sinusoids in quadrature (90° phase shifted)
1 2
20 µm
(V +)-(V -)
1 1
0°
(V +)-(V -)
2 2
Reference
45°
(V +)-(V -)
0 0
360° (nominal)
Limits Open collector output, asynchronous pulse
Ti0000 interface only
Active high
Repeatability
<0.1 mm
V V
p q
Length of limit actuator
NOTE: Ti0000 interface contains a transistor to invert the readhead's 'active low' signal to give an 'active high' output.
Set-up *
3.3 (nom)
Voltage
at V
X
0
0 50% Signal level 70%
Between 50% and 70% signal level, V is a duty cycle, 20 µm duration.
X
Time spent at 3.3 V increases with incremental signal level.
At >70% signal level V is nominal 3.3 V.
X
0.7 to 1.35 Vpp with Green LED indication,
(readhead) and 120R termination.
Centred on 1.65 V
NOTE: Ti0000A00V centred on 2.5 V
0.8 to 1 Vpp
Bi-directionally repeatable
Differential pulse V ,
0
centred on 45°
T101 readhead only
x
Active low
Repeatability
<0.1 mm
V V
p q
Length of limit actuator
100%
* Set-up signals as shown are not present
during calibration routine.
…
Inverse signals not shown for clarity
15