Supply Voltage ........................................................................................................................................................................5.0 VDC ±10 %, 3.3 VDC ±10 %
Supply Current .................................................................................................................................................................................................20 mA maximum
Output Voltage
Low Output Level ................................................................................................................................................................................. Vss+0.4 V maximum
High Output Level................................................................................................................................................................................... Vdd-0.5 V minimum
Output Current
With 4.5 VDC Supply Voltage .......................................................................................................................................................................4 mA maximum
With 3.0 VDC Supply Voltage .......................................................................................................................................................................2 mA maximum
Rise/Fall Time (Incremental Output) ............................................................................................................................................................... 500 ns maximum
Shaft RPM (Ball Bearing) .........................................................................................................................................................................10,000 rpm maximum
Nominal ..........................................................................................................................................................................................................±0.7 ° or better
Operating Temperature Range........................................................................................................................................ -40 ºC to +125 ºC (-40 °F to +257 °F)
Storage Temperature Range ........................................................................................................................................... -55 °C to +125 °C (-67 °F to +257 °F)
Humidity ....................................................................................................................................................................MIL-STD-202, Method 103B, Condition B
Vibration .............................................................................................................................................................................................................................. 15 G
Shock .................................................................................................................................................................................................................................. 50 G
Rotational Life
S Bushing (@1,000 rpm)................................................................................................................................................................. 100,000,000 revolutions
T & W Bushings (@1,000 rpm with 250 g side load) ........................................................................................................................ 50,000,000 revolutions
IP Rating ............................................................................................................................................................................................................................. IP 65
Shaft End Play......................................................................................................................................................................0.30 mm (0.012 ”) T.I.R. maximum
Shaft Radial Play ..................................................................................................................................................................0.12 mm (0.005 ”) T.I.R. maximum
Wave Soldering ............................................................................................................................................. 96.5Sn/3.0Ag/0.5Cu solder with no-clean
fl
ux
260 °C (500 °F) max. for 10 seconds
Wash processes ....................................................................................................................................................................................... Not recommended
Marking.................................................................................................................................... Manufacturer’s trademark, name, part number, and date code.
Hardware ....................................................................One lockwasher and one mounting nut supplied with each encoder, except on servo mount versions.
Pin Configuration
Output Type
Absolute
Pin 1 (DI)
Digital Input
Pin 2 (CLK)
Clock
Pin 3
GND
Pin 4 (DO)
Digital Output
Pin 5
VCC*
Pin 6
CS
* Can be 5 or 3.3 VDC depending on the version.
WARNING Cancer and Reproductive Harm -
www.P65Warnings.ca.gov
* RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011.
Specifications are subject to change without notice. Users should verify actual device performance in their specific
applications. The products described herein and this document are subject to specific legal disclaimers as set forth on
the last page of this document, and at
www.bourns.com/docs/legal/disclaimer.pdf
Applications
■
Material handling equipment
■
Brushless DC motor commutation
■
Robotics
■
Industrial automation
■
Petroleum refinery
■
Medical
■
Office equipment
■
Audio and broadcast equipment
EMS22A - Non-Contacting Absolute Encoder
Output Type Waveform and Variant Table
Absolute Output
CSn
t
CSn 500 ns min.
t
CLKFE
500 ns
0
T
CLK/2 500 ns
7
15
0
CLK
D0
D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 S1 S2 S3 S4 S5 P1
D9
t
D0 Tristate
t
D0 active
100 ns
t
D0 valid 375 ns
Angular Position Data
100 ns min.
Status Bits
Parity Bit
Data Content
D9:D0
S1
S2
S3
S4
S5
P1
Description
Absolute angular position data
End of offset compensation algorithm
Cordic overflow indicating an error in cordic part
Linearity alarm
Increase in magnitude
Decrease in magnitude
Even parity for detecting bits 1-15 transmission error
μC
EMS22
1st Device
DO
CSn
DI
CLK
EMS22
2nd Device
DO
CSn
DI
CLK
EMS22
Last Device
DO
CSn
DI
CLK
Data IN
CLK
CSn
Daisy Chain Hardware Configuration
CSn
CLK
DO
t CLK FE
TCLK/2
1
8
16
D
1
2
3
D9 D8 D7
t DO active
t DO valid
D6 D5 D4 D3 D2
D1 D0
OCF
COF
LIN
Mag
INC
Mag Even
DEC PAR
D9
D8 D7
Angular Position Data
1st Device
Status Bits
Angular Position Data
2nd Device
Daisy Chain Mode Data Transfer
Specifications are subject to change without notice.
Users should verify actual device performance in their specific applications.
The products described herein and this document are subject to specific disclaimers as set forth on the last page of this document, and at
www.bourns.com/legal/disclaimer.pdf.
Consult factory for options not shown, including:
• Wire lead or cable options • Special shaft/bushing sizes and features
• Connectors
• Special performance characteristics
• Non-standard resolutions
• PCB mounting bracket
EMS22A - Non-Contacting Absolute Encoder
Product Dimensions
Shaft Style D (Bushing T)
15.88 ± .25
(.625 ± .010)
13.89 ± .38
(.547 ± .015)
1.57 ± 0.12
(.062 ± .005)
10.29 ± 0.12
(.405 ± .005)
DIA.
3/8-32 UNEF-2A THD
DIA.
21.21 ± .25
(.835 ± .010)
2.79
(.110)
.51 ± .03
(.020 ± .001)
6 PLCS.
9.53
(.375)
4.00
(.157)
2.01
(.079)
5 PLCS.
.51 ± .03
(.020 ± .001)
6 PLCS.
22.23 ± .78
(.875 ± .031)
3.17 +.00/-.01
(.1247 +.0000/-.0003)
7.94 ± 0.12
(.313 ± .005)
AR LUG
1.18 ± .0.12
R
(.047 ± .005)
0.66 ± 0.12
X
(.026 ± .005)
HIGH (FMS)
7.95 ± 0.12
(.313 ± .005)
10.67 ± 0.12
(.420 ± .005)
DIA.
3.18 ± 0.12
(.125 ± .005)
DIA.
PANEL LAYOUT
Shaft Style B (Bushing S)
15.88 ± .25
(.625 ± .010)
13.89 ± .38
(.547 ± .015)
1.57 ± 0.12
(.062 ± .005)
3/8-32 UNEF-2A THD
DIA.
6.34
(0.249)
7.94 ± 0.12
(.313 ± .005)
21.21 ± .25
(.835 ± .010)
2.79
(.110)
.51 ± .03
(.020 ± .001)
6 PLCS.
10.29
(.405)
DIA.
9.53
(.375)
4.00
(.157)
2.01
(.079)
5 PLCS.
.51 ± .03
(.020 ± .001)
6 PLCS.
22.23 ± .78
(.875 ± .031)
AR LUG
1.18 ± 0.12
R
(.047 ± .005)
0.66 ± 0.12
X
(.026 ± .005)
HIGH (FMS)
7.95 ± 0.12
(.313 ± .005)
10.67 ± 0.12
(.420 ± .005)
DIA.
DIMENSIONS:
MM
(INCHES)
3.18 ± 0.12
(.125 ± .005)
DIA.
PANEL LAYOUT
Specifications are subject to change without notice.
Users should verify actual device performance in their specific applications.
The products described herein and this document are subject to specific disclaimers as set forth on the last page of this document, and at
www.bourns.com/legal/disclaimer.pdf.
EMS22A - Non-Contacting Absolute Encoder
Product Dimensions
Shaft Style D (Bushing W)
15.88 ± .25
(.625 ± .010)
13.89 ± .38
(.547 ± .015)
9.53
(.375)
1.57
(.062)
3.17 +.00/-.01
DIA.
(.1247 +.0000/-.0003)
22.23
(.875)
DIA.
21.21 ± .25
(.835 ± .010)
2.74
(.108)
19.05
(.75)
DIA.
.51 ± .03
(.020 ± .001)
6 PLCS.
1.57
(.062)
1.57
(.062)
2.01
(.079)
5 PLCS.
.51 ± .03
(.020 ± .001)
6 PLCS.
4.00
(.157)
22.23 ± .78
(.875 ± .031)
Cable Assembly
CONNECTOR
2.00 MM PITCH, 6 CIRCUITS
2 PLCS.
254.0 ± 6.35
(10.00 ± 0.25)
13.97
(0.55)
2 PLCS.
CIRCUIT #1
25.4
(1.0)
MAX.
2 PLCS.
FLAT CABLE
2.0 MM PITCH ROUND CONDUCTOR
24 AWG (7X32) STRANDED, TOP COAT
6 CIRCUITS, P.V.C. INSULATION
PIN 1 IDENTIFICATION STRIPE
CIRCUIT #1
DIMENSIONS:
MM
(INCHES)
Specifications are subject to change without notice.
Users should verify actual device performance in their specific applications.
The products described herein and this document are subject to specific disclaimers as set forth on the last page of this document, and at
www.bourns.com/legal/disclaimer.pdf.
EMS22A - Non-Contacting Absolute Encoder
How To Order
BOURNS EMS22 22 MM NON-CONTACTING ABSOLUTE ENCODER
E M S 2 2 A 5 0 - B 2 8 - L S 6
INDEX CHANNEL
Code Description
0
No Index
VOLTAGE
SUPPLY
Code Description
3.3 VDC
3
5 VDC
5
SHAFT STYLE
Code
B
C
D
R
M
SHAFT LENGTH
DESIGNATOR*
Code Description
1/2 " Long
16
5/8 " Long
20
7/8 " Long
28
25 mm Long
25
(Available with
D Bushing Only)
TERMINAL
CONFIGURATION**
Code Description
L
Axial, Multi-
Purpose Pin
Rear Ribbons
M
Cable with
Connector
Rear Ribbons
W
Cable -
No Connector
RESOLUTION
Code
States
6
1024
BUSHING DESIGNATOR
Code Description
S
3/8 " D X 3/8 " L Threaded
(Single Ball Bearing)
3/8 " D X 3/8 " L Threaded
T
(Dual Ball Bearing)
Servo Mount 7/8 " D
W
(Dual Ball Bearing)
9 mm D X 7.94 mm L Threaded
D
(Single Ball Bearing)
Available With
Description
Bushings (Code)
1/4 " Dia., Plain End
S
1/4 " Dia., Flatted End
S
1/8 " Dia., Plain End
T, W
6 mm Dia., Slotted End
D
6 mm Dia., Flatted End
D
OUTPUT TYPE
Code Description
CW Absolute
A
CCW Absolute
B
Notes
See Note 1 below
See Note 2 below
* Shaft length measured from mounting surface.
** Standard ribbon cable is 10 inches long. Consult factory for other lengths.
Note 1: (A) positions increase from 0 to 1024 with CW rotation of the shaft.
Note 2: (B) positions increase from 0 to 1024 with CCW rotation of the shaft.
REV. 11/18
Specifications are subject to change without notice.
Users should verify actual device performance in their specific applications.
The products described herein and this document are subject to specific disclaimers as set forth on the last page of this document, and at
