Interfaces; Analog Output Signal (Bml-S1F_-A - Balluff BML-S1F-A/Q-M0-0-KA/KD/KF Serie Manual De Instrucciones

BML-S1F_-A/Q _ _ _ -M_ _ 0- _ 0-...
Incremental Magnetic Linear Encoder
6

Interfaces

6.1 Analog output signal
(BML-S1F_-A...)
With the analog sine and cosine signals +A (+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.
Output voltage
+B–(– B )
1 Vss
(typ.)
+A – (– A)
+Z –(– Z)
0°
Fig. 6-1: Signals of the sine and cosine sensor for forward
movement
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
+A (+Sin)
−A (−Sin)
Fig. 6-2: Circuitry example of subsequent electronics with analog
output
16 english
Signal periods 360° el.
360° (typ. )
90° 180° 270° 360°