Resolution ................................................................................................................................................................................ 32 to 512 PPR and 1024 states
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 ......................................................................................................................................................................................................... ±0.5 ° or better
Worst Case ................................................................................................................................................................................................................... ±1.4 °
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 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
A/B Quadrature
Direction/Step
PWM
Absolute
Pin 1
A
Pulse
PWM Signal
Digital Input
Pin 2
B
Direction
GND
Clock
Pin 3
GND
GND
GND
GND
Pin 4
Index
Index
GND
Digital Output
Pin 5
VCC*
VCC*
VCC*
VCC*
Pin 6
CS**
CS**
CS**
CS**
* Can be 5 or 3.3 VDC depending on the version.
** Active low chip select pin.
*RoHS Directive 2002/95/EC Jan 27 2003 including Annex.
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications
Applications
■
Material handling equipment
■
Brushless DC motor commutation
■
Robotics
■
Automotive
■
Industrial automation
■
Petroleum refinery
■
Medical
■
Office equipment
■
Audio and broadcast equipment
EMS22 - Non-Contacting Rotary Magnetic Encoder
Output Type Waveforms and Variant Tables
Quadrature Output
360
= 1 Cycle
PPR
Edge Separation
PPR 3.3 Vcc 5.0 Vcc Index 1 Index 3
256
256
256
256
128
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
A
128
128
128
64
64
Index 1 = 1 LSB
B
64
64
32
Z
Index 3 = 3 LSB
32
32
32
Absolute Output
CSn
t
CSn
t
CLKFE
T
CLK/2
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
t
D0 valid
Angular Position Data
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
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications
EMS22 - Non-Contacting Rotary Magnetic Encoder
Output Type Waveforms and Variant Tables (Continued)
PWM Output
Parameter
PWM frequency
MIN pulse with
MAX pulse with
Symbol
fPWM
PWMIN
PWMAX
Type
0.9756
1
1024
Unit
KHz
µs
µs
Note
Signal period: 1025
µs
Position 0 Angle 0 °
Position 1023 Angle 359.65 °
Angle
PW
MIN ±5 %
0 deg
(Pos 0)
Analog output using an external low pass filter
Vcc
1
1025
PW
MAX ±5 %
359.65 deg
(Pos 1023)
1/f
PWM ±5 %
0V
0°
360 °
R
Vin
C
Vout
Direction/Step Output
PPR 3.3 Vcc 5.0 Vcc Index 1 Index 3
512
512
512
512
256
256
256
256
128
128
128
128
64
64
64
64
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Index 1 = 1 LSB
Z
Index 3 = 3 LSB
LSB
CW
Direction
CCW
t Dir valid
Specifications are subject to change without notice.
Customers 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
EMS22
mm SMD Trimming Potentiometer
3312 -
-
2
Non-Contacting Rotary Magnetic Encoder
Dimensional Drawings
Shaft Style D (Bushing T)
15.88 ± .25
(.625 ± .010)
13.89 ± .38
(.547 ± .015)
1.57
(.062)
DIA.
21.21 ± .25
(.835 ± .010)
3.17 +.00/-.01
(.1247 +.0000/-.0003)
10.29
(.405)
DIA.
2.79
(.110)
.51 ± .03
(.020 ± .001)
6 PLCS.
9.53
(.375)
4.00
(.157)
20.88 ± .25
(.822 ± .010)
2.01
(.079)
5 PLCS.
.51 ± .03
(.020 ± .001)
6 PLCS.
Shaft Style B (Bushing S)
15.88 ± .25
(.625 ± .010)
13.89 ± .38
(.547 ± .015)
1.57
(.062)
DIA.
6.34
(0.249)
21.21 ± .25
(.835 ± .010)
10.29
(.405)
DIA.
2.79
(.110)
.51 ± .03
(.020 ± .001)
6 PLCS.
9.53
(.375)
4.00
(.157)
20.88 ± .25
(.822 ± .010)
2.01
(.079)
5 PLCS.
.51 ± .03
(.020 ± .001)
6 PLCS.
Shaft Style D (Bushing W)
15.88 ± .25
(.625 ± .010)
13.89 ± .38
(.547 ± .015)
1.57
(.062)
9.53
(.375)
DIMENSIONS:
MM
(INCHES)
DIA.
3.17 +.00/-.01
(.1247 +.0000/-.0003)
22.23
(.875)
DIA.
21.21 ± .25
(.835 ± .010)
19.05
(.75)
DIA.
2.74
(.108)
.51 ± .03
(.020 ± .001)
6 PLCS.
1.57
(.062)
1.57
(.062)
22.23 ± .25
(.875 ± .010)
2.01
(.079)
5 PLCS.
.51 ± .03
(.020 ± .001)
6 PLCS.
4.00
(.157)
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications
EMS22
mm SMD Trimming Potentiometer
3312 -
-
2
Non-Contacting Rotary Magnetic Encoder
How To Order
BOURNS EMS22 22 MM NON-CONTACTING ROTARY MAGNETIC ENCODER
E M S 2 2 S 5 1 - B 2 8 - L Q 3
INDEX CHANNEL
Available With
Output Types (Code)
Code Description
No Index
A, P
0
1 Pulse
Q, D
1
3 Pulses
Q, D
3
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)
Code
1
2
3
4
5
6
RESOLUTION
Avail. with
PPR/
Output Types
States***
Q
32
Q, D
64
Q, D
128
Q, D
256
D
512
A, P
1024***
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
TERMINAL
CONFIGURATION**
Code Description
L
Axial, Multi-
Purpose Pin
Rear Ribbons
M
Cable with
Connector
Rear Ribbons
W
Cable -
No Connector
OUTPUT TYPE
Code Description
Quadrature
Q
CW Absolute
A
CW PWM
P
Direction/Step
D
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.
Asia-Pacific:
TEL +886-2 25624117
FAX +886-2 25624116
Europe:
TEL +41-41 7685555
FAX +41-41 7685510
The Americas:
TEL +1-951 781-5500
FAX +1-951 781-5700
www.bourns.com
REV. 01/09
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications
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