Lenord+Bauer GEL 293, Руководство по эксплуатации

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3 Description Bauer
Current output(optional)
32
GEL 293
English
T(N), U(N), X(N) – Two-track signal with inverse signal tracks
1
1
2
N
2
N
V
S
V
Sig
T(N) 5 VDC ± 5 % TTL
U(N) 10 to 30 VDC TTL
X(N) 10 to 30 VDC HTL
3.5 Current output(optional)
For the means of displaying and controlling a standardised measuring current
of 0 to 20 mA, 4 to 20 mA or
‑
20 to +20 mA which depends on the speed and
the sense of rotation can be obtained from the pulse frequency. For this pur-
pose the measuring pulses are integrated and converted into an applied cur-
rent, resulting in a strictly linear interrelation between the measuring current
and the pulse frequency. I
n
C
I
n
B
I
n
A
Because of the high resolution (up to 40,000 pulses per
revolution) a DC output current is obtained which
shows a low harmonic content even at a very low speed
range (e.g. 0 to 0.5 min
‑
1
). The harmonic content de-
pends on the pulse frequency and the determined at-
tenuation
d
, latter influencing the rising and trailing
edge times as well as the delay time in case of erratic
changes of the speed
t
a
10 %
50 %
90 %
t
v
t
I
a
The preferred attenuation has be specified when ordering the encoder (
d3
is the default
setting):
p
[%]
f [Hz]
t
a
t
v
d
f
p
t
a
t
v
Attenuation
effective pulse frequency (
= n×i
)
Harmonic content (
= I
eff
/I
a
)
Rising edge time (
= f(d)
)
Delay time (
= f(d)
)
The speed at which the maximum current
of 20 mA is achieved is indicated on the
identification plate.