Bourns Model EMS22 Non-Contacting Magnetic Rotary Encoders
Bourns Model EMS22 are non-contacting rotary magnetic encoders with a Hall Effect application-specific standard product (ASSP) capable of producing four distinct output waveforms. These waveforms include 2-bit quadrature up to 256 Pulses per Revolution (PPR), Step/Direction up to 512 PPR, Pulse-Width Modulated (PWM) output with 1024 positions, and Absolute with 1024 positions. Model EMS22 is available in both a 3.3 and 5.0 Vdc supply voltage and is offered in two different versions.
These encoders have the capability of rotating up to 10,000 RPM while maintaining code accuracy, making them suitable for MMI applications such as industrial automation. This performance is achieved by utilizing dual ball bearings in the construction of each device, resulting in extended rotational life up to 100,000,000 shaft revolutions. The EMS22 non-contacting encoders are ideal for use in harsh environments where extreme levels of temperature, moisture, and particles are present. Their outstanding performance is attributed to the non-contacting technology and superior performance of the austriamicrosystems® AS5040 Hall Effect ASSP. These encoders are sealed to IP 65 (ingression protection) with an optional upgrade to IP 67.
The EMS22 can offer enhanced reliability in harsh environmental conditions such as mud, dust, grease, oil, water and dirt, giving this product an edge in performance over traditional optical and contacting encoders. In addition, there are no contacting parts between the magnet and the ASSP to degrade the life expectancy of this type of encoder. As a result, the EMS22 can have more than 50 times the life expectancy of traditional contacting encoders. The designer and end user can expect cycle life performance without degradation of signal accuracy, a clear advantage over encoders that use optical or contacting technology.
Features
- Bushing or servo mount
- Non-contacting magnetic technology
- Small size
- CMOS and TTL compatible
- Long life
- High operating speed
- Highly repeatable
- Sealed option
- Daisy-chain configuration
or chip-select option
- Wide temperature range:
-40ºC to +125ºC
Applications
- Audio mixer and broadcasting equipment
- Brushless DC motors
- Car audio and navigation
- Cursor position sensing in oscilloscopes
- Food processing and packaging
- Forklifts and material handling equipment
- Gas pedal position sensing
- Headlight position controls
- Level setting for ultrasound
imaging devices
- Light dimmers
- Marine applications
- Medical devices (non-life critical)
- Metal cutting saws
- Metal working and instrumentation
- Office equipment: printers,
scanners, copiers
- Power seating position indicators
- Power tools
- Pressing and punching machines
- Replacement of optical encoders
- Replacement of potentiometers
- Robotics
- Servomotor control
- Steering wheel position sensing
|
