Data Sheet

ManualsBrandsSparkfun Electronics ManualsLinear & Rotary ResistorsBourns Absolute Encoder (EAW0J-B24-AE0128L)

Features

■ Absolute encoder / absolute code output

■ Digital output

■ Sturdy construction

■ Bushing mount

■ Available with PC board mounting bracket (optional)

■ *RoHS compliant

EAW - Absolute Contacting Encoder (ACE

™

)

*RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011.

Speciﬁ cations are subject to change without notice.

The device characteristics and parameters in this data sheet can and do vary in different applications and actual device performance may vary over time.

Users should verify actual device performance in their speciﬁ c applications.

Electrical Characteristics

Output ...............................................................................................................................................................................8-bit code with 128 absolute states

Closed Circuit Resistance ...........................................................................................................................................................................5 ohms maximum

Open Circuit Resistance ....................................................................................................................................................................... 100 K ohms minimum

Contact Rating .................................................................................................................................................. 10 milliamp @ 10 VDC or 0.1 watt maximum

Insulation Resistance (500 VDC) ...................................................................................................................................................1,000 megohms minimum

Dielectric Withstanding Voltage (MIL-STD-202 Method 301)

Sea Level ............................................................................................................................................................................................ 1,000 VAC minimum

Electrical Travel .....................................................................................................................................................................................................Continuous

Contact Bounce (60 RPM)........................................................................................................................................................... 2.7 milliseconds maximum*

RPM (Operating) .............................................................................................................................................................................................. 120 maximum

Environmental Characteristics

Operating Temperature Range .......................................................................................................................................-40 ºC to +85 ºC (-40 °F to +185 °F)

Storage Temperature Range ..........................................................................................................................................-40 ºC to +85 ºC (-40 °F to +185 °F)

Humidity................................................................................................................................................................. MIL-STD-202, Method 103B, Condition B

Vibration .......................................................................................................................................................................................................................... 15 G

Contact Bounce ...........................................................................................................................................................................0.1 millisecond maximum

Shock............................................................................................................................................................................................................................... 50 G

Rotational Life.................................................................................................................................................................... 50,000 shaft revolutions minimum

IP Rating ..........................................................................................................................................................................................................................IP 40

Mechanical Characteristics

Mechanical Angle ........................................................................................................................................................................................ 360 ° Continuous

Running Torque .............................................................................................................................................................. 0.5 to 1.5 N-cm (0.75 to 2.50 oz-in.)

Mounting Torque .........................................................................................................................................................................79 N-cm (7 lb.-in.) maximum

Shaft Side Load (Static)....................................................................................................................................................................4.5 kg (10 lbs.) minimum

Weight ................................................................................................................................................................................ Approximately 14 gms. (0.50 oz.)

Terminals ................................................................................................................................................................................. Printed circuit board terminals

Soldering Condition

Manual Soldering ................................................................................................................... 96.5Sn/3.0Ag/0.5Cu solid wire or no-clean rosin cored wire

370 °C (700 °F) max. for 3 seconds

Wave Soldering ...........................................................................................................................................96.5Sn/3.0Ag/0.5Cu solder with no-clean ﬂ ux

260 °C (500 °F) max. for 5 seconds

Wash processes .................................................................................................................................................................................... Not recommended

Marking ...........................................................................................................................Manufacturer’s name and trademark, part number, and date code.

Hardware ................................................. One lockwasher and one mounting nut are shipped with each encoder, except where noted in the part number.

Packaging ............................................................................................................................................................................................................. 45 pcs./tray

*High probability of missing quadrature codes with maximum bounce.

General Information

*RoHS COMPLIANT

Until now, the choice of an absolute

encoder meant an expensive, and larger-

sized product. Through the use of

combinatorial mathematics, the absolute

code pattern of the Bourns

Absolute

Contacting Encoder (ACE

™

) is placed on a

single track for a very economical, energy-

efﬁ cient and compact product. Bourns

ACE

™

provides an absolute digital output

that will also retain its last position in the

event of a power failure.

An intelligent alternative to incremental

encoders and potentiometers, the Bourns

ACE

™

is ideally suited for many industrial,

automotive, medical and consumer product

applications.

Recommended Control Diagram for ACE-128

μP

RESNET

4609X-

101-472

“common” is either

on a decoded

“select” pin

(active low)

or at GND.

ACETAB:

256 byte

code

conversion

table (ROM)

P7P6P5P4P3P2P1

Summary of content (5 pages)

PAGE 1
T PL IA N M CO *R oH S Features ■ Absolute encoder / absolute code output ■ Digital output ■ Sturdy construction ■ Bushing mount ■ Available with PC board mounting bracket (optional) ■ *RoHS compliant EAW - Absolute Contacting Encoder (ACE™) General Information Until now, the choice of an absolute encoder meant an expensive, and largersized product.
PAGE 2
EAW - Absolute Contacting Encoder (ACE™) Pin Output Code For ACE-128 Bit/Pin correlation: b7 b6 b5 b4 b3 b2 b1 b0 = p8 p7 p6 p5 p4 p3 p2 p1 A binary “1” denotes an “open” switch and a binary “0” denotes a “closed” switch. Positions 0-127 are seen by a clockwise rotation of the shaft.
PAGE 3
EAW - Absolute Contacting Encoder (ACE™) Dimensional Drawings Bushing Mounted: Housing A with Rear Facing Terminals 23.88 (.940) 6.32 +0.03/-0.08 (.249 +.001/-.003) 22.2 ± .25 (.874 ± .010) 9.02 ± .15 (.355 ± .006) 1.19 (.047) 8 7 C 6 5 12.7 (.500) 14.7 ± 0.5 (.578 ± .020) DIA. 8.51 ± .25 (.335 ± .010) 19.05 ± .38 (.750 ± .015) 6.35 (.250) 1.6 (.063) 11.1 (.437) 1.52 (.060) 27.94 ± .25 (1.100 ± .010) 2.79 (.110) 13.97 (.550) 1 2 C 3 1.19 (.047) M9 X 0.75-6g SPL 9.0 DIA. (.354) 4 0.
PAGE 4
EAW - Absolute Contacting Encoder (ACE™) Dimensional Drawings Shaft Style B 1.6 (.063) Shaft Style R Shaft Style C 6.32 + 0.03/– 0.06 DIA. (.249 + .001/– .003) 6.00 ± 0.05 DIA. (.236 ± .002) 5.54 ± .076 (.218 ± .003) 1.19 (.047) "D" 6.32 + 0.03/– 0.06 DIA. (.249 + .001/– .003) 1.6 (.063) 1.19 (.
PAGE 5
EAW - Absolute Contacting Encoder (ACE™) How to Order PART NUMBERING SYSTEM E A W 0 J - B 2 4 - A E 0 1 2 8 L RoHS IDENTIFIER Code Description L Compliant Code Rotational Life A 50,000 Revolutions BUSHING CONFIGURATION Code Description W 9 mm x 1/4 " Length. Threaded M9x0.75 L 9 mm x 3/8 " Length. Threaded M9x0.75 (Use B shaft only.) DETENT CONFIGURATION Code Description 0 Non-Detented ANTI-ROTATION LUG POSITION Code Description J 9:00 Position D None PERFORMANCE CODE Code Detents States/Rev.