Output Specifications - Renishaw TONiC RESM20 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. Wide reference mark not available on Ti0004 interfaces.
Alarm
† Asynchronous pulse
Line driven
> 15 ms
E
Alarm asserted when:
– Signal amplitude < 20% or > 135%
– Readhead speed 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.
* Set-up signals as shown are not present during calibtation routine.
† Inverse signals not shown for clarity
TONiC RESM20 angle encoder system installation guide
Resolution
Synchronised pulse Z, duration as resolution
Synchronised pulse Z, duration signal period
Set-up*
1
Voltage
at X
0
Signal level 100%
0
Setup 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° (nom)
Set-up*
3.3 V (nom)
Voltage
at V
X
0
0 50% Signal level
Between 50% and 70% signal level, V
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 1.2 Vpp
Bi-directionally repeatable.
Differential pulse V , centred on 45°
0
70% 100%
is a duty cycle.
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