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15
6
Interfaces
6.1
Analog output signal
(BML-S1F_-
A
…)
With the analog sine and cosine sA (+Sin),
−A (−Sin), +B (+Cos) and −B (−Cos) the controller
evaluates the relation of the signal amplitudes and, from
the signals, interpolates the precise position within a
period (Fig. 6-1). For a movement over several periods, the
controller also counts the number of periods.
For correct function, the sine signal and the
cosine signal must be evaluated depending on
the direction.
Fig. 6-1:
+A–(–A)
+B–(–B)
+Z–(–Z)
1 Vss
0°
90°
180°
270°
360°
Signals of the sine and cosine sensor, forward movement
corresponds to increasing angle
The sensor transmits the measurement as an analog sine/
cosine differential signal with an amplitude of approx. 1 Vss
(peak/peak value) to the controller.
The period length is dependent on the pole width:
– BML-S1F_-A…M3…: 1 mm
– BML-S1F_-A…M5…: 2 mm
If the sensor is supplied with voltage that is
isolated from the processing electronics, the
GND for this voltage must be connected to the
GND of the processing electronics.
Fig. 6-2:
+A (+Sin)
−A (−Sin)
Circuitry example of subsequent electronics with analog
output
Signal periods 360° el.
Output voltage
360° (typ. )
(typ.)
BML-S1F_-A/Q _ _ _ -M_ _ 0- _ 0-…
Incremental Magnetic Linear Encoder
english
Содержание BML-S1F Series
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