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EM14 Datasheet(PDF) 6 Page - Bourns Electronic Solutions

Part No. EM14
Description  Non-Contacting Magnetic Encoder
Download  8 Pages
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Manufacturer  BOURNS [Bourns Electronic Solutions]
Direct Link  http://www.bourns.com
Logo BOURNS - Bourns Electronic Solutions

EM14 Datasheet(HTML) 6 Page - Bourns Electronic Solutions

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EMS22 Features and Benefits
Design engineers with constraints such as cost, space,
circuit complexity and resolution will appreciate the
unique features and benefits of the Model EMS22.
EMS22 non-contacting rotary magnetic encoders can be
interconnected in a daisy-chain configuration for a serial
read-out option. This option is beneficial where memory
overhead and space for wiring each individual encoder
separately is critical in the construction of a control device
as illustrated in Figure 5. The output of this configuration
is the combined output of each individual encoder
connected in series to the microprocessor.
Another great capability of this product is the chip-select
option. This option allows the interrogation of each encoder
individually by the microprocessor. Unlike daisy-chain, this
feature takes less time to execute, ultimately enhancing the
speed of the control loop response.
If temperature variation is a critical factor in the application,
the EMS22 offers excellent performance in a wide
temperature range, from - 40 °C to + 125 °C (- 40 °F to
+ 257 °F). This feature is suitable for applications in extremely
cold and hot temperature conditions that can affect the
output performance of optical and contacting encoders.
Designers can choose from a variety of output signals to
fit their application needs, whether it is a simple counter,
or precision sensing. The EMS22 is capable of operating
with either a +5.0 Vdc supply voltage, or the more energy
efficient +3.3 Vdc supply voltage.
Table 1 below provides a comparison of the various
technologies, output types, supply voltages, and resolution
that can be achieved with each Bourns® Encoder model
family.
Figure 5: Daisy-Chain Hardware Configuration
Table 1: Comparison of Various Bourns® Models
Micro-
processor
Data Input
CLK
Chip Select
Data
Input
Chip
Select CLK
Prog.
Data
Input
EMS22
Data
Input
Chip
Select CLK
Prog.
Data
Input
EMS22
Data
Input
Chip
Select CLK
Prog.
Data
Input
EMS22
Bourns®
Encoder Model
Technology
Output Type(s)
Supply Voltage
(Vdc)
Resolution
(PPR)/ States*
EAW (ACE)
Contacting
Absolute
3.3 & 5.0
128*
ECW
Contacting
Quadrature
3.3 & 5.0
6, 9, 12, 24, 36
EM14
Optical
Quadrature
5.0
8, 16, 32, 64
EN
Optical
Quadrature
5.0
25, 50, 64, 100, 125, 128,
200, 256
EMS22
Magnetic
Quadrature
3.3 & 5.0
32, 64, 128, 256
EMS22
Magnetic
Direction/Step
3.3 & 5.0
64, 128, 256, 512
EMS22
Magnetic
Absolute/PWM
3.3 & 5.0
1024*


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