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
Direction/Step
Pin 1
Pulse
Pin 2
Direction
Pin 3
GND
Pin 4
Index
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.
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
EMS22D - Non-Contacting Direction/Step Encoder
Output Type Waveform and Variant Table
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
500 ns
B
A
A
B
Microprocessor
Encoder 1
CS1
Chip Select Hardware Sample
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
EMS22D - Non-Contacting Direction/Step Encoder
Product Dimensions
Shaft Style D (Bushing T)
15.88 ± .25
(.625 ± .010)
13.89 ± .38
(.547 ± .015)
1.57 ± 0.12
(.062 ± .005)
DIA.
21.21 ± .25
(.835 ± .010)
3.17 +.00/-.01
(.1247 +.0000/-.0003)
10.29 ± 0.12
(.405 ± .005)
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 ± 0.12
(.062 ± .005)
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.
DIMENSIONS:
Shaft Style D (Bushing W)
15.88 ± .25
(.625 ± .010)
13.89 ± .38
(.547 ± .015)
1.57
(.062)
9.53
(.375)
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.
EMS22D - Non-Contacting Direction/Step Encoder
Product Dimensions
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)
How To Order
BOURNS EMS22 22 MM NON-CONTACTING DIRECTION/STEP ENCODER
E M S 2 2 D 5 1 - B 2 8 - L S 5
INDEX CHANNEL
Code Description
1 LSB
1
3 LSB
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)
RESOLUTION
PPR
Code
64
2
128
3
256
4
512
5
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
D
Direction/Step
* Shaft length measured from mounting surface.
** Standard ribbon cable is 10 inches long. Consult factory for other lengths.
REV. 07/12
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications.
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