Large Diameter (56 mm),
Housed Two and Three
Channel Optical Encoders
Technical Data
HEDL-65xx
HEDM-65xx
HEDS-65xx Series
Features:
outputs. This index is an active
high pulse that occurs once every
full rotation of the codewheel.
Resolutions up to 1024 Counts Per
Revolution are available in the two
and three channel versions.
• Two Channel Quadrature
Output with Optional
Index Pulse
• TTL Compatible Single Ended
Outputs on HEDS Series
• 100°C Operating Temperature
The line driver option offers
enhanced performance when the
encoder is used in noisy environ-
ments, or when it is required to
drive long distances.
• Industry Standard 26C31
CMOS Line Driver IC on
HEDL Series
• Easy Assembly, No Signal
Adjustment Necessary
• Resolutions up to 2048 Counts
Per Revolution
• Maximum Shaft Diameter
of 5/8 Inches
The line driver option utilizes an
industry standard line driver IC
(26C31) which provides comple-
mentary outputs for each encoder
Applications
The HEDS-65xx / HEDL-65xx
provide motion detection to a
very high resolution and accept a
variety of shaft sizes up to a
maximum of 5/8 inches.
channel. Thus the outputs of the
–
• Single +5 V Supply
line driver encoder are A and A, B
–
–
and B, and I and I for three
channel versions. Suggested line
receivers are 26C32 and 26C33.
Description
The HEDS-65xx/HEDL-65xx
are high performance two and three
channel optical incremental
encoders. These encoders empha-
size high reliability, high resolution,
and easy assembly. Each encoder
contains a lensed LED source
(emitter), an integrated circuit with
detectors and output circuitry, and a
codewheel which rotates between
the emitter and detector integrated
circuit. The outputs of the HEDS-
6500 are two single ended square
waves in quadrature. The HEDL-
65xx outputs are differential.
The quadrature signals are ac-
cessed through a cable and 10-pin
female connector. Please refer to
the ordering information at the end
of this data sheet for a selection
matrix.
The HEDS-6540 / HEDL-6540 also
have a third channel index output in
addition to the two quadrature