EMS22A

*R
oH
S
CO
M
PL
IA
N
T
Features
■ 3.3 and 5 VDC voltage supply option
■ Resolution: 1024 positions
■ Absolute
■ Long life
■ Bushing or servo mount
■ High operating speed
■ Non-contacting magnetic technology
■ Highly repeatable
■ Small size
■ Sealed option
■ CMOS and TTL compatible
■ Magnetic technology
EMS22A - Non-Contacting Absolute Encoder
Electrical Characteristics
Resolution ........................................................................................................................................................................................................... 1024 positions
Insulation Resistance (500 VDC) ......................................................................................................................................................................1,000 megohms
Electrical Travel ........................................................................................................................................................................................................ Continuous
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
Linearity ..............................................................................................................................................................................................................................0.5 %
Accuracy
Nominal ..........................................................................................................................................................................................................±0.7 ° or better
Worst Case................................................................................................................................................................................................................... ±1.4 °
Output Transition Noise................................................................................................................................................................................... 0.12 ° RMS max.
Environmental Characteristics
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
Mechanical Characteristics
Mechanical Angle ............................................................................................................................................................................................ 360 ° Continuous
Torque
Starting .................................................................................................................................................................................... 43 ±21 g-cm (0.6 ±0.3 oz-in.)
Running ................................................................................................................................................................................... 29 ±14 g-cm (0.4 ±0.2 oz-in.)
Mounting Torque.........................................................................................................................................................................................203 N-cm (18 lb.-in.)
Shaft End Play......................................................................................................................................................................0.30 mm (0.012 ”) T.I.R. maximum
Shaft Radial Play ..................................................................................................................................................................0.12 mm (0.005 ”) T.I.R. maximum
Weight .............................................................................................................................................................................................................. 11 gms. (0.4 oz.)
Terminals ......................................................................................................................................................................................... Axial, radial or ribbon cable
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 flux
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*
* Can be 5 or 3.3 VDC depending on the version.
*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.
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 specific applications.
Pin 6
CS
Applications
■ Material handling equipment
■ Medical
■ Brushless DC motor commutation
■ Office equipment
■ Robotics
■ Audio and broadcast equipment
■ Automotive
■ Industrial automation
■ Petroleum refinery
EMS22A - Non-Contacting Absolute Encoder
Output Type Waveform and Variant Table
Absolute Output
CSn
t CSn 500 ns min.
t CLKFE
T CLK/2 500 ns
500 ns
0
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
Data Content
D9:D0
S1
S2
S3
S4
S5
P1
100 ns min.
Status Bits
Parity Bit
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
Data IN
DO
CSn
DI
CLK
EMS22
2nd Device
DO
CSn
EMS22
Last Device
DI
CLK
DO
CSn
DI
CLK
CLK
CSn
Daisy Chain Hardware Configuration
CSn
t CLK FE
TCLK/2
CLK
1
DO
D9 D8 D7
t DO active
t DO valid
8
D6 D5 D4 D3 D2
16
D1 D0
OCF
Angular Position Data
COF
LIN
Mag
INC
Status Bits
1st Device
Mag Even
DEC PAR
D
1
2
3
D9
D8 D7
Angular Position Data
2nd Device
Daisy Chain Mode Data Transfer
Specifications 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 specific applications.
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)
13.89 ± .38
(.547 ± .015)
15.88 ± .25
(.625 ± .010)
7.94 ± 0.12
(.313 ± .005)
1.57 ± 0.12
(.062 ± .005)
10.29 ± 0.12
(.405 ± .005)
DIA.
3/8-32 UNEF-2A THD
DIA.
3.17 +.00/-.01
(.1247 +.0000/-.0003)
21.21 ± .25
(.835 ± .010)
.51 ± .03
(.020 ± .001)
6 PLCS.
2.79
(.110)
AR LUG
1.18 ± .0.12
(.047 ± .005)
0.66 ± 0.12
X
(.026 ± .005)
HIGH (FMS)
R
9.53
(.375)
22.23 ± .78
(.875 ± .031)
4.00
(.157)
2.01
(.079)
5 PLCS.
.51 ± .03
(.020 ± .001)
6 PLCS.
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)
13.89 ± .38
(.547 ± .015)
15.88 ± .25
(.625 ± .010)
3/8-32 UNEF-2A THD
21.21 ± .25
(.835 ± .010)
2.79
(.110)
.51 ± .03
(.020 ± .001)
6 PLCS.
6.34
(0.249)
DIMENSIONS:
AR LUG
1.18 ± 0.12
(.047 ± .005)
0.66 ± 0.12
X
(.026 ± .005)
HIGH (FMS)
R
22.23 ± .78
(.875 ± .031)
4.00
(.157)
.51 ± .03
(.020 ± .001)
6 PLCS.
DIA.
10.29
(.405)
DIA.
9.53
(.375)
2.01
(.079)
5 PLCS.
7.94 ± 0.12
(.313 ± .005)
1.57 ± 0.12
(.062 ± .005)
7.95 ± 0.12
(.313 ± .005)
MM
(INCHES)
10.67 ± 0.12
(.420 ± .005)
DIA.
3.18 ± 0.12
(.125 ± .005)
DIA.
PANEL LAYOUT
Specifications 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 specific applications.
EMS22A - Non-Contacting Absolute Encoder
Product Dimensions
Shaft Style D (Bushing W)
13.89 ± .38
(.547 ± .015)
9.53
(.375)
1.57
(.062)
15.88 ± .25
(.625 ± .010)
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.
2.01
(.079)
5 PLCS.
.51 ± .03
(.020 ± .001)
6 PLCS.
1.57
(.062)
1.57
(.062)
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
DIMENSIONS:
PIN 1 IDENTIFICATION STRIPE
CIRCUIT #1
MM
(INCHES)
Specifications 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 specific applications.
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 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)
SHAFT STYLE
Code
B
C
D
R
M
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
TERMINAL
CONFIGURATION**
Code Description
Axial, MultiL
Purpose Pin
M
Rear Ribbons
Cable with
Connector
W
Rear Ribbons
Cable No Connector
RESOLUTION
Code
States
6
1024
BUSHING DESIGNATOR
Code Description
S
3/8 " D X 3/8 " L Threaded
(Single Ball Bearing)
T
3/8 " D X 3/8 " L Threaded
(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)
* 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. 05/14
Specifications 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 specific applications.
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