Braun A5S1-n Series, Руководство пользователя

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A5S1-n-Manual_EN_Rev02 2021_JAN_19 Page 11 of 36
1.10 Level and shape of the output signal
Rectangular pulses at low frequencies and with short lines. At higher frequencies and with long
lines, the signal at the receiver becomes a saw tooth tread profile.
Pulse pitch depends on the profile shape, when sampling a gear wheel profile, it is about 1:1.
The level is the same over the entire speed range. The built-in output stage can pull loads to
zero and to operating voltage equally strong.
The signal level during no-load running is almost equal to the supply voltage. The diagrams
show how it gets smaller when the current load increases (the high-level decreases, the low
level becomes higher). If the permissible maximum load of 25 mA is exceeded, the level drops
sharply. The sensor is not damaged, the output is short-circuit proof.
The maximum load corresponds to a load resistance of 1000 ohms at 24 V supply voltage, 500
ohms are permissible with 12 V supply voltage.
Output level with load against zero
Output level with load against Ub (+ supply)
high level
low level
volts
Ub-1.5V
Ub-2.5V
1V
maximum
load
high level
low level
volts
Ub
Ub-1.5V
maximum
load
high level
1V
low level
2V
output
+ sensor supply Ub
common zero
output
+ sensor supply Ub
common zero