Lenord+Bauer GEL 27-Serie Betriebsanleitung Seite 42

4 Description Lenord + Bauer
The integrated electronics are supplied with power via the connection cable. The cable
gland (6) fixes the connection cable to the housing and seals the encoder.
Inside the encoder there is a metal measuring scale that is connected to the shaft. This
measuring scale is scanned by one or several magnetic sensors. Electrical pulses are
generated in the sensors by the rotating measuring scale. The integrated electronics
convert these pulses into square-wave voltage or current signals.
The output frequency is proportional to the rotational speed of the axis. The signals are
evaluated in the vehicle control electronics.
Multichannel
The incremental encoder has 1 to 8 output channels. These channels can be configured
as single channels or in groups with a fixed phase relationship. A typical configuration
would be the arrangement of two sensors offset electrically by 90° for additional de-
tection of direction.
Other arrangements such as three sensors offset by 120° or a single channel and two
sensors offset by 90° as a group are possible.
The channels can all be operated with a common power supply or, if required, electri-
cally isolated with different supply voltages from 10 to 30 VDC.
The incremental encoder can supply up to 3 different numbers of pulses. These num-
bers of pulses can be allocated to the output channels or the groups of output channels
are required.
The number of pulses output per revolution can be found on the rating plate (see
→ page 35)
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GEL 27xx