PL
IA
N
Features
■
3.3 and 5 VDC voltage supply option
■
Absolute
■
Bushing or servo mount
■
Non-contacting magnetic technology
■
Small size
■
CMOS and TTL compatible
■
Resolution: 1024 positions
■
Long life
■
High operating speed
■
Highly repeatable
■
Sealed option
■
Magnetic technology
*R
oH
S
CO
M
T
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
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.
Analogue and Mixed Signal
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