Incremental
Absolute
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Compact size, Rugged Construction, User Selectable
Parameters
The model R21 is an optical shaft encoder in a 2" diameter
x 1-7/8" (Ø51mm x 48mm) housing with an integral mounting arm, compatible
with a variety of mounting accessories for installation either above or below a
moving web or conveyor. When used with the MW-8 (8.00" circumference) or
MW-20 (20.00cm circumference) measuring wheel it can accurately track the web
or conveyor to within ±.007" or ±.016cm per revolution. This is not
a light duty encoder - it was built with heavy duty bearings and solid
construction for reliable, long-term operation in continuous duty applications.
During installation various features, such as the number of
pulses per revolution, can be selected by setting configuration switches. The
available features depend on the encoder model (see Currently
Available Programs table)
| Example: R21 - P8EAJ / 8-30S3 MW8-UB3-10 is an |
Example: R21 - P20EAJ / 8-30DS MW20-3M is an |
 | R21 wheeled encoder |
| factory configured with the "8EAJ" program that includes a
single output with the enhanced anti-jitter option, and user
selectable pulses per revolution in English units |
| operates on 8-30 vdc |
| push/pull output circuit |
| M12 4-pin connector |
| Accessories:
MW-8 measuring wheels
MB-UB3 mounting bracket
10 ft cable |
|
| R21 wheeled encoder |
| factory configured with the "20EAJ" program that includes
a single output with the enhanced anti-jitter option, and user
selectable pulses per revolution in Metric units |
| operates on 8-30 vdc |
| 7272 line driver output circuit (+A/-A outputs) |
| 16mm circular connector |
| Accessories:
MW-20 measuring wheels
3-meter cable |
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Standard Features and Options
| Double ended shaft and integral mounting arm |
| Unbreakable code disk |
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| Various programmable features |
| Attached cable or optional connector |
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Program |
Description |
|
| 8EAJ |
| Output
Type: single with Enhanced
Anti-Jitter
option |
| Output
Circuits: 7272 push/pull, 7273 open
collector, or 7272 differential line driver (the output circuit is
pre-configured at the factory) |
| Selectable Output Pulses per linear movement when using MW-8 wheels:
Pulses per Foot - 1, 2, 3, 4, 6
Pulses per Inch - 1, 2, 3, 4, 5, 10, 16, 20 |
|
Datasheet
(116k) |
| 20EAJ |
| Output
Type: single with Enhanced
Anti-Jitter
option |
| Output
Circuits: 7272 push/pull, 7273 open
collector, or 7272 differential line driver (the output circuit is
pre-configured at the factory) |
| Selectable Output Pulses per linear movement when using MW-20
wheels:
Millimeters per Pulse - 1, 2, 3, 4, 5, 10, 15, 20, 25, 50, 75,
100 |
|
Datasheet
(116k) |
Custom
models are available. Contact us for more information.
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