H
Two Channel High Resolution
Optical Incremental Encoder
Modules
Technical Data
HEDS-9000/9100/9200
Extended Resolution
Series
Features
• High Resolution: Up to 2048
Cycles per Revolution
• Up to 8192 Counts per
Revolution with 4X Decoding
• Two Channel Quadrature
Output
• Low Cost
• Easy to Mount
• No Signal Adjustment
Required
• Small Size
• -40
°
C to 100
°
C Operating
Temperature
• TTL Compatible
• Single 5 V Supply
codestrip, these modules detect
relative linear position.
These modules consist of a lensed
Light Emitting Diode (LED)
source and detector IC enclosed
in a small C shaped plastic
package. Due to a highly
collimated light source and
unique photodetector array, these
modules provide a highly reliable
quadrature output.
The HEDS-9000 and HEDS-9100
are designed for use with
codewheels which have an optical
radius of 23.36 mm and 11 mm
respectively. The HEDS-9200 is
designed for use with a linear
codestrip.
These components produce a two
channel quadrature output which
can be accessed through five
0.025 inch square pins located on
0.1 inch centers.
The resolution of the HEDS-9000
Options T and U are 2000 and
2048 counts per revolution
respectively. The HEDS-9100
Options B and J are 1000 and
1024 counts per revolution
respectively. The HEDS-9200
Option 300 and 360 linear
encoder modules have resolutions
of 300 and 360 lines per inch.
Consult local Hewlett-Packard
sales representatives for other
resolutions.
Description
The HEDS-9000 Options T and U
and the HEDS-9100 Options B
and J are high resolution two
channel rotary incremental
encoder modules. These options
are an extension of our popular
HEDS-9000 and HEDS-9100
series. When used with a code-
wheel, these modules detect
relative rotary position. The
HEDS-9200 Option 300 and 360
are high resolution linear encoder
modules. When used with a
Theory of Operation
The diagram shown on the fol-
lowing page is a block diagram of
the encoder module. As seen in
this block diagram, the module
contains a single LED as its light
source. The light is collimated
into a parallel beam by means of a
single polycarbonate lens located
directly over the LED. Opposite
the emitter is the integrated
detector circuit. This IC consists
ESD WARNING: NORMAL HANDLING PRECAUTIONS SHOULD BE TAKEN TO AVOID STATIC
DISCHARGE.
5965-5889E
2-63
MOTION SENSING
AND CONTROL
HP [ AGILENT(HEWLETT-PACKARD) ]
