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Lenord + Bauer
3.3
Functional principle
The sensor's magnetic field inside the encoder is changed by the passing of the inte-
grated target wheel. The change in the magnetic field is detected by the sensor and is
converted into sinusoidal measuring signals. An internal interpolation electronic gen-
erates the rectangular output signals and, optional, a speed-dependent current from
the sinusoidal signals.
3.4
Signal patterns
Exlanations on the following illustrations:
V
= Supply voltage
S
V
= Signal amplitude
Sig
1, 2 = Track 1, Track 2
N = Reference track (optional)
The signals are shown for clockwise rotation when looking onto the encoder flange.
S(N) – Separate signal and direction tracks
t
Pulse width
i
t
Delay time
s
In the case of a direction change the pulses will follow slightly delayed (t
subsequent counting electronic can react without lost of a pulse. The direction signal
(Track 1) can be inverted.
The signal pulse width is marked down on the identification plate. The delay time t
been set dependent on it.
V(N) – Two-track signal
360° el.
90°
t
Edge distance at 200 kHz ≥ 0.6 s;
F
valid for the other signal patterns except S(N)
GEL 293
Functional principle
t
t
s
i
t
F
V
1
S
10 to 30 VDC HTL
2
t
t
i
5 µs
2 µs
N
20 µs
10 µs
100 µs 10 or 30 µs
V
1
S
10 to 30 VDC HTL
2
N
3 Description
V
Sig
S
), so that a
s
has
s
V
Sig
31
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