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6. AB incremental output signals
Order code:
SSII and BISS
In addition to the absolute position information, MXS2 sensors can provide AB incremental signals through
the NPN open collector output circuit. They r5 VDC ±5% power supply with I
out
= 40 mA max. Thermal
and short-circuit protections are not provided.
Please note that the WBA2 magnetic tape is fitted with two tracks: an absolute track on one side and an
incremental track on the other side. Thus, you must strictly comply with the mounting direction! For complete
information refer to section
In the following table the main features of the incremental measuring system are listed for each order code
(see
). They concern the resolution (i.e. the distance between two following edges of A and B
channels), the minimum edge distance (i.e. the minimum spacing between two following signal edges at
output), the maximum counting frequency and the maximum travel speed.
Order code
Resolution
Min. edge distance *
Max. AB frequency
Max. travel speed
MXS2-...-50-...
50 µm
0.25 µs
73 kHz
7 m/s
MXS2-...-10-...
10 µm
0.25 µs
350 kHz
7 m/s
MXS2-...-5-...
5 µm
0.25 µs
580 kHz
7 m/s
MXS2-...-2-...
2 µm
0.25 µs
580 kHz
2.8 m/s
MXS2-...-1-...
1 µm
0.25 µs
580 kHz
1.4 m/s
* max. counting frequency = 4 MHz
Counting direction
►
Please note that the incremental signals and their relationship with the pole pitch are represented
schematically in the Figure above. In the example the interpolation factor 4 is used. The real interpolation factor
results from the size (expressed in μm) of the pole pitch divided by the resolution of the specific sensor.
Example:
MXS2-SSII-50-...
Resolution = 50 µm
Pole pitch size = 2000 µm
Interpolation factor
Thus, in the case of the MXS2-SSII-50-… sensor, the system will provide 40 AB pulses per each pole.
NOTE:
Please note that the
Counting direction
parameter available in the BiSS-C interface (see on
affects the absolute position information, not the AB incremental signals.
=
2000
= 40
50
Summary of Contents for MXS2
Page 1: ...Magnetic Scale MXS2 Manual...