Tel: 805-968-0782 /800-350-2727 | Fax: 805-968-3154 / 800-960-2726
7230 Hollister Ave., Goleta, CA 93117-2807 | www.beisensors.com
Specification No. 02082-001 Rev. 08-13
These commodities, technology or software if exported from the United States must be in accordance with the Bureau of Industry, and Security, Export Administration regulations. Diversion contrary to U.S law is prohibited.
HS20 Incremental Optical Encoder
Model HS20 is a
compact, rugged
hollow-shaft encoder
designed with harsh
environments in mind.
This optical encoder
can be used where
lighter duty encoders
are not suitable or cost
effective. The compact
design makes it easy
to incorporate into tight
installations and is
well-sealed to stand up to dust, dirt, and splashing liquids.
Other features include dual preloaded bearings for longevity and stability, dif-
ferential line driver outputs for noise immunity and a standard, Euro-style 8-pin
(M12 x1) sealed connector for easy connectivity. A specially designed, non-
marring shaft clamp allows for easy installation and eliminates shaft damage
should you need to reinstall or reposition the encoder on the shaft. Model HS20
is ideal for small motor applications and a number of harsh applications including
off-highway agriculture and construction equipment.
TYPE:
Hollow Shaft,
2.0” Diameter
TETHER:
R2 = Tetherarm
R3 = Flexmount
CHANNELS:
ABZC
Connector:
K8 = M12 X 1, 8 Pin (Euro style)
CS18 = 18” pigtail with cable gland
SHAFT SEAL:
SS =Through Shaft
Rubber Seals
BS = Blind Shaft Rubber Seal
FS = Through Shaft Felt Seals
BFS = Blind Shaft Felt Seal
See Note 2
CYCLES PER TURN:
2 to 1024, See table 2,
back page
BORE SIZE
62 = .625”
37 = .375”
50 = .500”
25 = .250”
VOLTAGE/OUTPUT:
28V/V = 5–28V
in/out
28V/5 = 5–28V
in/
5V
out
28V/OC = 5–28V
in/
OC
out
HS20
HS20 Incremental Ordering Options FOR ASSISTANCE CALL 800-350-2727
Use this diagram, working from left to right to construct your model number (example: HS20-50-R2-SS-1024-ABZC-28V/V-K8).
Mechanical Specifications
Shaft Bore: 5/8”, 1/2”, 1/4”, metric available
Allowable Misalignment: 0.005 TIR, 0.010
Axial using R2 Tether
Bore Runout: 0.001 TIR
Starting Torque at 25°C: 3.5 in-oz (max)
Bearings: 52100 dual preloaded bearings
Shaft Material: Aluminum
Bearing Housing:
Aluminum with protective finish Cover: Aluminum with protective finish
Bearing Life: 7.5 X 10
9
revs
Maximum RPM: 6000 (see frequency response)
Moment of Inertia: 3.4 X 10
-4
oz-in-sec
2
Weight: 8 ounces, maximum
Electrical Specifications
Code: Incremental output format; 2 channels in quadrature,
with complements; 1/2 cycle index gated with negative B channel
Cycles Per Shaft Turn: 2 through 1024
Supply Voltage: 5–28 VDC ± 5%
Current Requirements: 100mA typical + output load, 250mA (max)
Voltage/Output:
(see note 5)
28V/V: Line Driver, 5–28 VDC in, V
out
= V
in
28V/5: Line Driver, 5–28 VDC in, V
out
= 5 VDC
28V/OC: Open Collector, 5–28 VDC in, OC
out
(
Higher frequency response may be available.
Please consult with the factory.
)
Protection Level: Overvoltage, reverse voltage.
Outputs short-circuit protected (1 minute max)
(see note 5)
Frequency Response: 100kHz
Output Termination Pinouts: see Table 1, back page
Environmental Specifications
Enclosure Rating: IP64
Temperature: 0–70° Standard
Shock: 50 g’s for 11 msec duration
Vibration: 5–2000 Hz @ 20 g’s
Humidity: 98% RH non-condensing
NOTES AND TABLES: All notes and tables referred to in the text
can be found on the back page.
C
Canadian Standards
Class I, Zone 0, Group IIC
U.S. Standards Class I, Group A,B,C & D;
Class II Group E, F & G
CENELEC
II 1 G Ex ia IIB/IIC T4
II 3 G Ex nA IIB T3 Gc
II 3 G Ex nA IIB T4 Gc
EN 55011
and EN 61000-6-2
Class I, Div 2, Group A,B,C & D;
Class II, Div 2, Group F & G
UL 12.0035X
UL 12.0082X
Special Models of the HS20 Incremental Encoder are available with one or more of the
following certifications. Consult factory for details.
SPECIAL
FEATURES:
S = Special
features specified
on purchase order.
(Consult factory)
See note 6
HAZARDOUS
AREA RATINGS:
Blank = None
EX = Intrinsically Safe
NI = Non-Incendive
Contact factory for
voltage options
(2 pages)
(3 pages)
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