Resolution ................................................................................................................................................................................................................ 1024 states
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 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
PWM
Pin 1
PWM Signal
Pin 2
GND
Pin 3
GND
Pin 4
GND
Pin 5
VCC*
Pin 6
CS**
* Can be 5 or 3.3 VDC depending on the version.
** Active low chip select pin; if not used connect pin 6 to GND.
*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.
Applications
■
Material handling equipment
■
Brushless DC motor commutation
■
Robotics
■
Automotive
■
Industrial automation
■
Petroleum refinery
■
Medical
■
Office equipment
■
Audio and broadcast equipment
EMS22P - Non-Contacting PWM Encoder
Output Type Waveform and Variant Table
Angle
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 °
1
1025
PW
MIN
0 deg
(Pos 0)
PW
MAX
Analog output using an external low pass filter
Vcc
t on
t off
0
512
1025
0V
0°
360 °
359.65 deg
(Pos 1023)
1/f
PWM
Position = t on * 1025/(t on + t off) - 1
Recommended Filter
R1
PWM
C1
C2
R2
analog out
VSS
Simple Passive 2nd Order Low Pass Filter
R1, R2
≥
4.7K Ohms
C1, C2
≥
1
μF
/ 6 V
R1 should be
≥
4.7K ohms to avoid loading of the PWM output.
Larger values of Rx and Cx will provide better filtering and less
ripple, but will also slow down the response time.
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
EMS22P - Non-Contacting PWM Encoder
Product Dimensions
Shaft Style D (Bushing T)
15.88 ± .25
(.625 ± .010)
13.89 ± .38
(.547 ± .015)
1.57 ± 0.12
(.062 ± .005)
3/8-32 UNEF-2A THD
7.94 ± .012
(.313 ± .005)
10.29 ± 0.12
(.405 ± .005)
DIA.
DIA.
21.21 ± .25
(.835 ± .010)
.51 ± .03
(.020 ± .001)
6 PLCS.
3.17 +.00/-.01
(.1247 +.0000/-.0003)
2.79
(.110)
9.53
(.375)
4.00
(.157)
2.01
(.079)
5 PLCS.
.51 ± .03
(.020 ± .001)
6 PLCS.
22.23 ± .78
(.875 ± .031)
R
AR LUG
1.18 ± 0.12
(.047 ± .005)
0.66 ± 0.12
X
(.026 ± .005)
HIGH (FMS)
7.95 ± .012
(.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
7.94 ± 0.12
(.313 ± .005)
DIA.
6.34
(0.249)
21.21 ± .25
(.835 ± .010)
.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)
R
10.29
(.405)
DIA.
2.79
(.110)
AR LUG
1.18 ± 0.12
(.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.
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.
EMS22P - Non-Contacting PWM Encoder
Product Dimensions (Continued)
Shaft Style D (Bushing W)
15.88 ± .25
(.625 ± .010)
13.89 ± .38
(.547 ± .015)
1.57
(.062)
9.53
(.375)
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 ± .78
(.875 ± .031)
2.01
(.079)
5 PLCS.
.51 ± .03
(.020 ± .001)
6 PLCS.
4.00
(.157)
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.
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.
3312 - 2
-
mm SMD Trimming
Encoder
EMS22P Non-Contacting PWM
Potentiometer
How To Order
BOURNS EMS22 22 MM NON-CONTACTING PWM ENCODER
E M S 2 2 P 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)
RESOLUTION
Code
States
6
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
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)
OUTPUT TYPE
Code Description Notes
See Note 1
CW PWM
P
See Note 2
CCW PWM
R
* Shaft length measured from mounting surface.
** Standard ribbon cable is 10 inches long. Consult factory for other lengths.
Note 1: (P) t on increases from 1 to 1025 with CW rotation of the shaft.
Note 2: (R) t on increases from 1 to 1025 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.
