Output Specifications - Renishaw TONiC T20 1 Series 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
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.
…
Alarm Asynchronous pulse
>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 options A, B, C, D
or 3-state alarm
Differentially transmitted signals forced open circuit for
>15 ms when alarm conditions valid.
…
Inverse signals not shown for clarity
*Set-up signals as shown are not present during calibration routine
Resolution
Synchronised pulse Z, duration as resolution
Synchronised pulse Z, duration signal period
*Set-up
1
Voltage
at X
0
0 Signal level
Setup signal voltage proportional to incremental signal amplitude
Analogue output signals
Incremental 2 channels V
(V +)-(V -)
1 1
(V +)-(V -)
2 2
Reference
(V +)-(V -)
0 0
*Set-up
3.3 (nom)
Voltage
at V
X
0
0
100%
Between 50% and 70% signal level, V
Time spent at 3.3 V increases with incremental signal level.
At >70% signal level V
and V differential sinusoids in quadrature (90° phase shifted)
1 2
20 µm
0.7 to 1.35 Vpp with green
LED indication, (readhead)
and 120R termination
0°
0.8 to 1.2 Vpp
45°
Bi-directionally repeatable
Differential pulse V
centred on 45°
360° (nom)
50% Signal level 70% 100%
is a duty cycle, 20 µm duration.
X
is nominal 3.3 V.
X
0