w w w . b o u r n s . c o m
Encoders
I.
Rotary Encoders
6mm Square........................................................................142
9mm Square........................................................................138
II. Rotary Optical Encoders
16mm X 21mm....................................................................144
III. Digital Contacting Encoders
22mm Square......................................................................146
IV. Absolute “ACE” Encoder
22mm Square......................................................................149
Specifications are subject to change without notice.
137
Features
■
■
■
■
■
Miniature package for design flexibility
Long operating life
Conductive plastic element
Bushing or PC board mount
Quadrature output
3315 - 9mm Square Sealed Incremental Encoder
Electrical Characteristics
Output.............................2-bit gray code,
Channel A leads Channel B
electrically turning clockwise (CW)
Closed Circuit Resistance............5 ohms
maximum
Contact Rating.....................100 milliamp
@ 16 VDC maximum
Insulation Resistance (500 VDC)
....................1,000 megohms minimum
Dielectric Withstanding Voltage
Sea Level ................900 VAC minimum
Electrical Travel......................Continuous
Contact Bounce (15 RPM)
......................5 milliseconds maximum
RPM (Operating)................120 maximum
Environmental Characteristics
Temperature Range .......-55ºC to +125ºC
Vibration ............................................30G
Contact Bounce
....................5.0 millisecond maximum
Shock ..............................................100G
Contact Bounce
....................5.0 millisecond maximum
Rotational Life ....100,000 cycles @ 6PPR
25,000 cycles @ 16ppr
Recommended Incremental Control Diagram
.0015µf
7
(CUSTOMER LOGIC CIRCUITRY)
9
DIRECTION
5ms DELAY
DEBOUNCE
(MC 14490)
DECODE
LOGIC
UP/DOWN
COUNTER
BINARY
OUTPUT
MAGNITUDE
Clockwise
Channel A
Channel B
Channel C
Mechanical Characteristics
Mechanical Angle ..................Continuous
Torque ........................5 oz-in. maximum
Marking ........Manufacturer’s symbol and
model number, product code,
terminal style, date code and
resistance code
Part Numbering System
3315 Y - 0 0 1 - 006
Model Number Designator
3315 = 9mm Encoder
Terminal Style Designator
C = In-line Straight Terminals Side Exit
R = In-line Terminals Rear Exit
P = 5.08mm x 2.54mm Triangular Pattern Rear Exit
Y = 5.08mm x 5.08mmTriangular Pattern Rear Exit
Shaft End Designator
0 = Shaft End Slotted
1 = Shaft End Flatted
Shaft Length Designator
0 = 12.7mm FMS Long Plastic Shaft
1 = 19.05mm FMS Long Plastic Shaft
(Use with bushing versions only)
2 = 5.59mm FMS (Bushingless version only)
Bushing Designator
1 = 6.35mm x 6.35mm Plastic
2 = 6.35mm x 6.35mm Ni Plated Brass
5 = Bushingless (Board Level)
Pulses per Revolution Code
006 = 6 ppr
016 = 16 ppr
138
Specifications are subject to change without notice.
3315 - Dimensions and Tolerances
Specifications are subject to change without notice.
139
3315 - Dimensions and Tolerances
140
Specifications are subject to change without notice.
3315 - Dimensions and Tolerances
Specifications are subject to change without notice.
141
Features
Miniature package for design flexibility
Long operating life
■ High operating temperature capabilities
■ Conductive plastic element
■ Bushing or PC board mount
■ Quadrature output
■
■
3375 - 6mm Square Encoder
Electrical Characteristics
Output ............................2-bit gray code,
Channel A leads Channel B
by electrically turning clockwise (CW)
Closed Circuit Resistance
.................................5 ohms maximum
Contact Rating
.......100 milliamp @ 16 VDC maximum
Insulation Resistance (500 VDC)
....................1,000 megohms minimum
Dielectric Withstanding Voltage
Sea Level ................900 VAC minimum
Electrical Travel......................Continuous
Contact Bounce (15 RPM)
......................5 milliseconds maximum
RPM (Operating)................120 maximum
Environmental Characteristics
Temperature Range .......-55ºC to +125ºC
Vibration ............................................30G
Contact Bounce ..............5 millisecond
maximum
Shock ..............................................100G
Contact Bounce ..............5 millisecond
maximum
Rotational Life..................100,000 cycles
Recommended Incremental Control Diagram
.0015µf
7
(CUSTOMER LOGIC CIRCUITRY)
9
DIRECTION
5ms DELAY
DEBOUNCE
(MC 14490)
DECODE
LOGIC
UP/DOWN
COUNTER
BINARY
OUTPUT
MAGNITUDE
Clockwise
Channel A
Channel B
Channel C
Mechanical Characteristics
Mechanical Angle ..................Continuous
Torque ........................5 oz-in. maximum
Marking ........Manufacturer’s symbol and
model number, product code,
terminal style, date code
Part Numbering System
3375 Y - 0 0 1 - 006
Model Number Designator
3375 = 6mm Encoder
Terminal Style Designator
C = In-line Straight Terminals Side Exit
P = 5.08mm x 2.54mm Triangular Pattern Rear Exit
Y = 5.08mm x 5.08mmTriangular Pattern Rear Exit
Shaft End Designator
0 = Shaft End Slotted
Shaft Length Designator
0 = 12.7mm FMS Long Plastic Shaft
(Use with bushing versions only)
Bushing Designator
1 = 6.35mm x 6.35mm Plastic
Pulses per Revolution Code
006 = 6 ppr
142
Specifications are subject to change without notice.
3375 - 6mm Square Encoder
Specifications are subject to change without notice.
143
Features
■
■
■
■
■
■
■
Two channel quadrature output
Bushing or servo mount
Square wave signal
Index channel available
Small size
Resolution to 256PPR
■
■
CMOS and TTL compatible
Long life
High operating speed
EN - Rotary Optical Encoder
Electrical Characteristics
Output ..................................................................2-bit gray code, Channel A leads Channel B by 90º (electrical) with clockwise rotation
Supply Voltage .............................................................................................................................................................5.0 VDC ±0.25 VDC*
Supply Current...................................................................................................................................................................26 mA maximum
Output Voltage
Low Output.........................................................................................................................................................................0.8V maximum
High Output ............................................................................................................................................................................4V minimum
Output Current
Low Output........................................................................................................................................................................25mA minimum
Insulation Resistance (500 VDC).........................................................................................................................................1,000 megohms
Rise/Fall Time ........................................................................................................................................................................200ns (typical)
Shaft RPM (Ball Bearing) .............................................................................................................................................3,000 rpm maximum
Power Consumption .......................................................................................................................................................136 mW maximum
Pulse Width (Electrical Degrees, Each Channel)...................................................................................................................180º ±45º TYP.
Pulse Width (Index Channel) .........................................................................................................................................................360º ±90º
Phase (Electrical Degrees, Channel A to Channel B)..............................................................................................................90º ±45º TYP.
Index Channel Centered on 1-1 State Combination of A and B Channels.......................................................................................0º ±45º
*Consult factory for other voltages up to 15 VDC.
Environmental Characteristics
Operating Temperature Range (Standard) ...........................................................................................................................-40ºC to +85ºC
Vibration ...................................................................................................................................................................................................5G
Shock .....................................................................................................................................................................................................50G
Humidity .....................................................................................................................................MIL-STD-202, Method 103B, Condition B
Mechanical Characteristics
Torque (Starting and Running)
A & C Bushings (Spring Loaded for Optimum Feel) ...................................................................................................1.5 oz-in. maximum
W, S & T Bushings (Ball Bearing Shaft Support) ........................................................................................................0.1 oz-in. maximum
Mechanical Rotation...................................................................................................................................................................Continuous
Shaft End Play ..........................................................................................................................................................0.012” T.I.R. maximum
Shaft Radial Play ......................................................................................................................................................0.005” T.I.R. maximum
Rotational Life
A & C Bushings (300 rpm maximum)** ..................................................................................................................10,000,000 revolutions
W, S & T Bushings (3,000 rpm maximum)**.........................................................................................................200,000,000 revolutions
Weight ................................................................................................................................................................................................0.4 oz.
**For resolutions ≤ 128 quadrature cycles per shaft revolution.
STANDARD RESOLUTIONS
AVAILABLE
OUTPUT TABLE
OUTPUT VOLTAGE
Channel A
Channel B
Index
Channel
(Optional)
4.0V (Min)
0.8V (Max)
4.0V (Min)
0.8V (Max)
4.0V (Min)
0.8V (Max)
1
0
1
0
1
0
For Non-Standard Resolutions—
Consult Factory
1 cycle
360° ± 90°
(Full quadrature output cycles per shaft
revolution)
25*
125
50*
128
64
200
100
256
Clockwise rotation
* Channel B leads Channel A
144
Specifications are subject to change without notice.
ROTARY OPTICAL
The Bourns® EN model is a self-contained rotary optical encoder. It
produces a 2-bit quadrature signal which is suitable for digital systems
where both magnitude and direction of adjustment must be provided.
The EN encoder is ideal for use as a digital panel control or as a position
sensing device in applications where long life, reliability, high resolution
and precise linearity are critical.
Bourns encoder output signals are square wave digital pulses which
do not require debounce circuitry. Both features make it possible to
significantly reduce the memory overhead, wiring and wiring interconnects required by other types of control devices.
EN optical encoders offer a useful rotational life of from 10 million to
200 million shaft revolutions, making them ideal for extended service
applications. The Bourns encoder is also compact and well suited for
situations where the available space is limited.
The EN series encoder converts rotary input into electrical signals
which can be used by microprocessors without A/D conversion.
EN - Rotary Optical Encoder
Dimensional Drawings
How To Order
Optional
Radial Leads
.635
SQ.
(.025)
2.54
TYP.
(.100)
18.5
(.73)
6.35
(.250)
BOURNS EN SERIES OPTICAL ENCODER
15.88
(.625)
E N C 1 J-D 2 8-L 0 0
2.36
(.093)
21.21
(.835)
9.525
(.375)
8.636
(.34 )
1/4-32 UNEF
3.167 + .000/ – .0076
DIA.
(.1247 + .000/ – .0003)
9.53
(.375)
1.37
(.054)
Bushing Style C
7.14 + .000/ – .0508
DIA.
(.281 + .000/ – .002)
10.32 + .000/ – .0508
DIA.
(.4062 + .000/ – .002)
9.53
(.375)
6.342 + .000/ – .0076
DIA.
(.2497 + .000/ – .0003)
3/8-32 UNEF
9.53
(.375)
9.53
(.375)
1.57
3/8-32 UNEF
(.062)
6.342 + .000/ – .0076
DIA.
(.2497 + .000/ – .0003)
1/4-32 UNEF
1.57
(.062)
3.167 + .000/ – .0076
DIA.
(.1247 + .000/ – .003)
Bushing Style S
(Ball Bearing)
Bushing Style A
GROUND
1.57
(.062)
21.8
(.86)
Vcc
.254 ± .076
(.010 .003)
.787 ± .254
(.031 ± .010)
SHAFT LENGTH*
Code Description
1/2" Long
16
5/8" Long
20
7/8" Long
28
SWITCHING
CONFIGURATION
Code Description
Channel A
Leads
Channel B
1
By 90
(Clockwise
Rotation)**
Code 1
Switching
2
With Index
Channel
Anti-rotation Lug
View
Bushing Style T
(Ball Bearing)
TERMINATION DIAGRAM
INDEX
OR CHANNEL A
N.C.
R.
ANTI-ROTATION
LUG POSITION
Code Description
None
D
9:00 Position
J
Rear MountP
ing Bracket
3.167 + .000/ – .0076
DIA.
(.1247 + .000/ – .003)
CHANNEL B
Optional
Radial Leads
-
A
+
B
19.05 ± .0127
DIA.
(.7500 ± .0005)
22.2 + .0127 / – .1270
DIA.
(.875 + .0005 / – .0050)
Servo Mount Style W (Ball Bearing)
Consult factory for options not shown, including:
• Wire lead or cable options
• Connectors
• Non-standard resolutions
• Special shaft/bushing sizes and features
• Special performance characteristics
• PCB mounting bracket
TERMINAL***
CONFIGURATION
Code Description
L
Axial, MultiPurpose Pin
Radial, MultiR
Purpose Pin
Rear Ribbon
M
Cable with
Connector
Side Ribbon
N
Cable with
Connector
Rear Ribbon
W
Cable - No
Connector
Side Ribbon
Y
Cable - No
Connector
RESOLUTION
Cycles Per
Code Revolution
25
00025
50
00050
64
00064
100
00100
125
00125
128
00128
200
00200
256
00256
1.57
(.062)
1.57
(.062)
1 2 8
SHAFT STYLE
Code
B
D
C
Description
1/4" Dia., Plain End
1/8" Dia., Plain End
1/4" Dia., Single
Flatted
Use With
Bushings (Code)
A, S
C, T, W
A, S
BUSHING CONFIGURATION
Code Description
A
3/8"D X 3/8"L Threaded
C
1/4"D X 1/4"L Threaded
S
3/8"D X 3/8"L Threaded
(Ball Bearing)
1/4"D X 3/8"L Threaded
T
(Ball Bearing)
Servo Mount 7/8"D
W
(Ball Bearing)
* Shaft length measured from mounting surface.
** 25 and 50ppr is reversed (Channel B leads Channel A)
*** Standard ribbon cable is 10" long
Consult factory for other lengths.
Specifications are subject to change without notice.
145
Features
■
■
■
■
■
■
Incremental encoder / quadrature output
Exceptionally long operating life
High operating temperature capabilities up to 125°C
Sturdy construction
Bushing mount
Available with PC board mounting bracket
(optional)
ECW - Digital Contacting Encoder
Electrical Characteristics
Output .................................................................2-bit gray code, Channel A leads Channel B by 90º electrically turning clockwise (CW)
Closed Circuit Resistance ................................................................................................................................................5 ohms maximum
Open Circuit Resistance .............................................................................................................................................100K 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 (15 RPM) ....................................................................................................................................5 milliseconds maximum
RPM (Operating).....................................................................................................................................................................120 maximum
Environmental Characteristics
Storage Temperature Range ..............................................................................................................................................-40ºC to +140ºC
Operating Temperature Range ............................................................................................................................................+1ºC to +125ºC
Humidity .....................................................................................................................................MIL-STD-202, Method 103B, Condition B
Vibration .................................................................................................................................................................................................15G
Contact Bounce.................................................................................................................................................0.1 millisecond maximum
Shock .....................................................................................................................................................................................................50G
Contact Bounce.................................................................................................................................................0.1 millisecond maximum
Rotational Life .....................................................................................................................................................200,000 shaft revolutions*
Mechanical Characteristics
Mechanical Angle .......................................................................................................................................................................Continuous
Weight ......................................................................................................................................................................Approximately 0.75 oz.
Torque (Detented) ............................................................................................................................................................0.75 to 2.25 oz-in.
Mounting Torque .............................................................................................................................................................7 in-lbs. maximum
Shaft Side Load (Static)......................................................................................................................................................10 lbs. minimum
*Applies to EC Option.
QUADRATURE OUTPUT TABLE
This table is intended to show available outputs as currently defined.
1/4 CYCLE PER DETENT
CW
FULL CYCLE PER DETENT (Normally Open in Detent Shown)
CW
Channel A
Channel A
Closed Circuit
Closed Circuit
Open Circuit
Open Circuit
Closed Circuit
Closed Circuit
Open Circuit
Open Circuit
D D D D D D D D D D D D D D D D D
D
D
Channel B
RECOMMENDED INCREMENTAL
CONTROL DIAGRAM
D
D
D
Channel B
.0015µf
7
(CUSTOMER LOGIC CIRCUITRY)
9
DIRECTION
5ms DELAY
DEBOUNCE
(MC 14490)
DECODE
LOGIC
UP/DOWN
COUNTER
BINARY
OUTPUT
MAGNITUDE
NOTE: PLASTIC SHAFT:
0.093 ± 0.002 DIA.
WITH A 0.025 ± 0.004 WIDE
X 0.030 ± 0.010 DEEP ADJUSTMENT SLOT
146
Specifications are subject to change without notice.
DIGITAL CONTACTING
The Digital Contacting Encoder is commonly referred to by such
names as Digital Panel Control, Bit Switch, Gray Switch and Digital
Switch. All such names are synonymous with a device whose output
is a digital gray code signal, rather than a conventional potentiometric
voltage ratio output.
conversion. The two (2) channel gray coded signal of this incremental
encoder allows the user’s decoder circuit to sense analog direction of
rotation, as well as up-down counter capabilities . . . all without the
time and cost required for A/D conversion. This approach can reduce
memory overhead, wiring and wiring interconnects, and can provide
greater MPU program speed.
The advantage of the Digital Contacting Encoder is that it permits the
direct entry of digitized analog data into a digital circuit without A/D
ECW - Digital Contacting Encoder
FOR ORDERING INFORMATION, SEE FOLLOWING PAGE.
BUSHING MOUNTED - HOUSING A
W style bushing shown.
22.2 ± 0.25
(.874 ± .010)
"L"
8.51
(.335)
6.35
(.250)
14.7 ± 0.5
DIA.
(.578 ± .020)
Shaft lengths "L" for B, C, R and Y styles
24 = .750" (19mm)
36 = 1.125" (28.5mm)
1.52
(.060)
.250
(6.35)
27.686
(1.090)
9.0
DIA.
(.354)
M9 X 0.75-6g SPL
A C B
"L" Dim. = 1.125 or .750
PCB BRACKET MOUNTED - HOUSING B
Dimensions not given are the same as Bushing Mounted.
5.74
(.226)
11.1
(.437)
8.1
(.320)
SOLDER HOLES - HOUSING C
Dimensions not given are the same as Bushing Mounted.
22.37 ± 0.25
(.920 ± .010)
9.02
(.355)
.762
(.030)
4 PLCS.
26.975
(1.062)
14.478
(.570)
17.069
(.672)
1.47
(.058)
A C B
6.35
(.250)
22.20 ± 0.25
(.874 ± .010)
8.51
(.335)
14.68 ± 5.08
(0.578 ± 0.20)
9.53X
(9.53)
6.35
(.250)
.051
(.020)
Shaft Style C
Shaft Style J
5.54 ± .076
(.218 ± .003)
3.94 + .051/ – .025
(.155 + .002/ – .001)
21.11
(.831)
6.32 + 0.03/– 0.06
"D"
DIA.
(.249 + .001/– .003)
"D" DIMENSION EXTENDS FROM SHAFT END TO BUSHING FACE
"D" = (SHAFT LENGTH, FMS) – (BUSHING LENGTH)
2.54
(.100)
Shaft Style R
4.75 ± .076
DIA.
(.187 ± .003)
"D"
PANEL HOLE DIMENSIONS
Bushing Mounted
2X
2.54
(.100)
5.08
(.200)
6.32 + 0.03/– 0.06
DIA.
(.249 + .001/– .003)
1.19
(.047)
34.21
(34.21)
.97
8X
R
(.038)
7.239
(.285)
1.6
(.063)
9.1
DIA.
(.360)
3.17
DIA.
(.125)
Specifications are subject to change without notice.
23.6
(.930)
19.76
(.778)
1.57
(.062)
4.7
DIA.
(.185)
.380
FOR SHAFTS
(9.65)
.520
FOR SHAFTS ≥ 1" LENGTH
(14.7)
SLOT DEPTH ("Y" SHAFT)
< 1" LENGTH
23.37 ± 0.25
(.920 ± .010)
17.0
(.67)
11.4
(.450)
2.54
TYP.
(.100)
1.2
DIA. 7 PLCS.
(.047)
12.24
(.482)
Shaft Style Y
1.19
(.047)
1.6
(.063)
PCB MOUNTING DIMENSIONS
(Housing Styles B and E)
15.2
(.600)
1.07
3X
(0.042)
10.90
(.429)
6.00
(.236)
DIA.
CL
9.5
(.375)
.107
DIA.
(.042)
3 PLCS.
22.68
11.33 (.893)
(.446)
27.686X
(27.686)
16.10
(.437)
8.99
(.0354)
Shaft Style B
B
PCB MOUNTING DIMENSIONS
"L"
7.70
(.303)
C
5.08
(.200)
SNAP-IN MOUNT - Housing G
13.08
(.515)
A
2.54
(.100)
FOR TOLERANCES NOT SHOWN
.XX = ±.010
.XXX = ± .005
SHAFT DIMENSIONS ± 1/32"
A C B
CHANNEL A
CHANNEL B
COMMON
147
ECW - Digital Contacting Encoder - How To Order
PART NUMBERING SYSTEM
E C W 1 J
-
B 2 4
- B C 0 0 2 4
PERFORMANCE CODE
Code Detents Cycles/Rev.
E0006
6
E0009
9
E0012
0
12
E0024
24
B0012
12
12
C0006
6
24
C0024
24
36
D0009
9
Code Rotational Life
C
200,000 Revolutions
L
100,000 Revolutions
BUSHING CONFIGURATION
Code Description
W
9mm x 1/4" Length. Threaded M9x0.75
L
9mm x 3/8" Length. Threaded M9x0.75
(Use B shaft only.)
T
9mm x 1/4". No Thread.
HOUSING TERMINAL CONFIGURATION
(X indicates "Equipped With"
Code
A B C D E F G*
Features
X
X
X X
Terminal Cover
X
X
X X
Terminals
X
X X
Solder Holes
X X X
X
PCB Bracket
X
X X
X
Hardware Included
X
Snap-In Mount
SWITCHING CONFIGURATION (In Detent Position)
Applies to performance codes B0012 and C0024
only, use code "0" for all other performance codes.
Code Description
0
Not Applicable
1
Normally Open
2
Normally Closed
ANTI-ROTATION LUG POSITION
Code Description
J
9:00 Position
D
None
SHAFT STYLE (See Outline Drawing for Details)
Code Description
B
Plain with Inserted Slot (1/4" Dia.)
C
Single Flatted (1/4" Dia.)
R
Plain with Inserted Slot (6mm Dia.)
Y
Split Shaft Version (.185" Dia.)
J
Flatted Shaft (3/16" Dia.)
The sample part number demonstrates the identification
code for Bourns contacting encoders.
The part number shown is a commonly used model,
typically available from stock.
148
*Bushing code T only.
SHAFT LENGTH (FMS)
Code
16
20
24
28
32
36
19
22
24
Available
Description
Shaft Styles
1/2" Length
B
5/8" (15.9mm) Length
J
3/4" (19mm) Length
B, C, J, Y
7/8" (22.2mm) Length
B, C, J, Y
1" (25.4mm) Length
B, C, J, Y
1-1/8" (28.6mm) Length B, C, J, Y
Metric
19mm Length
R
22mm Length
R
24mm Length
R
Specifications are subject to change without notice.
Features
■
■
■
■
■
Absolute encoder / gray code output
Digital output
High operating temperature capabilities up to 125°C
Sturdy construction
■
Bushing mount
Available with PC board mounting bracket
(optional)
EAW - Absolute Contacting Encoder (ACE™)
Recommended Control Diagram for ACE-128
"common" is either on
a decoded "select" pin
(active low) or at GND.
1
2
C
3
4
8
7
C
6
5
P1 P2 P3 P4 P5 P6 P7 P8
µP
RESNET
4609X101-472
ACETAB:
256 byte
code
conversion
table (ROM)
Electrical Characteristics
Output ..........................................................................................................................................8-bit gray code with 128 absolute states
Closed Circuit Resistance ................................................................................................................................................5 ohms maximum
Open Circuit Resistance .............................................................................................................................................100K 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
Storage Temperature Range ..............................................................................................................................................-40ºC to +140ºC
Operating Temperature Range ...........................................................................................................................................-40ºC to +125ºC
Humidity .....................................................................................................................................MIL-STD-202, Method 103B, Condition B
Vibration .................................................................................................................................................................................................15G
Contact Bounce.................................................................................................................................................0.1 millisecond maximum
Shock .....................................................................................................................................................................................................50G
Contact Bounce.................................................................................................................................................0.1 millisecond maximum
Rotational Life........................................................................................................................................50,000 shaft revolutions minimum*
Mechanical Characteristics
Mechanical Angle ......................................................................................................................................................................Continuous*
Weight ......................................................................................................................................................................Approximately 0.50 oz.
Torque ..............................................................................................................................................................................0.75 to 2.50 oz-in.
Mounting Torque .............................................................................................................................................................7 in-lbs. maximum
Shaft Side Load (Static)......................................................................................................................................................10 lbs. minimum
* Consult Factory
Specifications are subject to change without notice.
149
Until now, the choice of an absolute encoder meant an expensive,
and larger-sized product. Through the use of combinatorial mathematics, the gray-code pattern of the Bourns Absolute Contacting
Encoder ACE™ is placed on a single track for a very economical,
energy-efficient 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.
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.
Position
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
150
p8
p7
p6
p5
p4
p3
p2
p1
Decimal
Output
0
0
0
0
0
1
1
0
0
0
0
0
0
0
0
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
0
0
0
0
0
0
0
0
1
1
0
0
0
0
0
0
0
0
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
0
0
0
0
0
0
0
0
1
1
0
0
0
0
0
0
0
0
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
0
0
0
0
0
0
0
0
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
0
0
0
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
127
63
62
58
56
184
152
24
8
72
73
77
79
15
47
175
191
159
31
29
28
92
76
12
4
36
164
166
167
135
151
215
223
207
143
142
14
46
38
6
2
18
82
83
211
195
203
235
239
231
199
71
7
23
19
3
1
9
41
169
233
225
229
245
Position
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
p8
p7
p6
p5
p4
p3
p2
p1
Decimal
Output
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
0
0
0
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
1
1
0
0
0
0
0
0
0
0
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
0
0
0
0
0
0
0
0
1
1
0
0
0
0
0
0
0
0
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
0
0
0
0
0
0
0
0
1
1
0
0
0
0
0
0
0
0
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
0
0
0
0
0
0
0
0
1
1
0
0
0
0
0
0
0
0
1
247
243
227
163
131
139
137
129
128
132
148
212
244
240
242
250
251
249
241
209
193
197
196
192
64
66
74
106
122
120
121
125
253
252
248
232
224
226
98
96
32
33
37
53
61
60
188
190
254
126
124
116
112
113
49
48
16
144
146
154
158
30
94
95
Specifications are subject to change without notice.
EAW - Absolute Contacting Encoder (ACE™)
Dimensional Drawings
Dimensional
Drawings
- For ACE - 128
Dimensional
Drawings
Bushing
mounted:
Housing
AA
Bushing
Mounted:
Housing
.940
(23.88)
.874 ± .010
(22.2 ± .25)
.047
(1.19)
.355 ± .006
(9.02 ± .15)
8
7
C
6
.335 ± .010
(8.81 ± .25)
.750 ± .015
(19.00 ± .38)
.250
(6.35)
5
.578 ± .020
DIA.
(14.7 ± 0.5)
.063
(1.6)
.437
(11.1)
.060
(1.52)
1.100 ± .010
(27.94 ± .25)
.110
(2.79)
.550
(14.0)
1
2
C
3
.047
(1.19)
M9 X 0.75-6g SPL
.354
DIA.
(9.0)
4
.226 ± .010
(5.74 ± .25)
.100
(2.54)
8 PLCS.
.020
(0.5)
10 PLCS.
PCB Bracket Mounted: Housing B
.920 ± .010
(23.37 ± .25)
8
7
C
6
.241
(6.12)
.355
(9.02)
5
.672
(17.07)
.030
TYP.
(0.76)
1
2
C
3
4
Shaft Style C
Shaft Style B
.249 + .001/– .003
DIA.
(6.32 + 0.03/– 0.06)
.063
(1.6)
.020
(0.51)
Shaft Style J
.158 + .002/ – .001
(3.94 + .051/ – .025)
.218 ± .003
(5.54 ± .076)
.047
(1.19)
"D"
.249 + .001/– .003
DIA.
(6.32 + 0.03/– 0.06)
Shaft Style R
.187 ± .003
DIA.
(4.75 ± .076)
"D"
.236
DIA.
(6.00)
.063
(1.6)
"D" DIMENSION EXTENDS FROM SHAFT END TO BUSHING FACE
"D" = (SHAFT LENGTH, FMS) – (BUSHING LENGTH)
PANEL HOLE DIMENSIONS
.375
(9.5)
PCB BOARD HOLE PATTERN W/PCB BRACKET
.200
(5.1)
2 PLCS.
.450
(11.4)
2 PLCS.
.100
TYP.
(2.54)
.360
DIA.
(9.1)
.125
DIA.
(3.17)
Specifications are subject to change without notice.
.600
(15.2)
2 PLCS.
1.000
(25.4)
.047
DIA. 14 PLCS.
(1.2)
151
EAW - ACE™ Encoder - How To Order
PART NUMBERING SYSTEM
E A W 0 J
-
B 2 4
- A E 0 1 2 8
Code Rotational Life
A
50,000 Revolutions
BUSHING CONFIGURATION
Code Description
W
9mm x 1/4" Length. Threaded M9x0.75
L
9mm x 3/8" Length. Threaded M9x0.75
(Use B shaft only.)
DETENT CONFIGURATION
Applies to performance codes E0016, E0030 and
E0036 only.
Code Description
0
Non-Detented
1
Detented
PERFORMANCE CODE
Code Detents States/Rev.
E0030*
30
30
E0036*
36
36
E0128
0
128
HOUSING TERMINAL CONFIGURATION
(X indicates "Equipped With"
Code
Features
A
B
C
Terminals
X
X
X
PCB Bracket
X
X
Hardware Included
X
X
*Bushing code T only.
ANTI-ROTATION LUG POSITION
Code Description
J
9:00 Position
D
None
SHAFT STYLE (See Outline Drawing for Details)
Code Description
B
Plain with Inserted Slot (1/4" Dia.)
C
Single Flatted (1/4" Dia.)
R
Plain with Inserted Slot (6mm Dia.)
SHAFT LENGTH (FMS)
Code Description
24
3/4" (19mm) Length
Metric
19
19mm Length
Available
Shaft Styles
B, C, J
R
The sample part number demonstrates the identification
code for Bourns contacting encoders.
The part number shown is a commonly used model,
typically available from stock.
*Consult factory concerning special inquiries.
152
Specifications are subject to change without notice.