Eltra Rotary Incremental Encoders Rotary are electro-mechanical devices designed to control the position and the angular speed of mechanical axles in motion.
About Eltra Rotary Incremental Encoders
Rotary incremental encoders are so defined since they track the increase (variation) concerning a position taken as a reference point and independently from the direction of the rotation. The incremental encoder senses rotation, speed, and acceleration by counting the number of pulses sent by the output circuit, but the zero point must be reset at every new start.
Eltra has developed a broad catalog of incremental encoders here classified according to the type of mechanical mounting (solid vs blind/through hollow shaft) and the type of sensing technology (optical vs magnetic), with a wide range of resolution, flange, and electronic outputs available to meet the specific application’s needs.
Besides standard versions, Eltra offers its Customers the possibility to customize and even develop custom-tailored devices to satisfy the most peculiar requests and to provide 360° solutions.
The products of Eltra Incremental Encoders
EL – ER 30 Optical Solid Shaft
The EL 30 – ER 30 series consists of miniaturized encoders (ø 30 mm) ideal when a minimal size and excellent performances are required. Several flanges and output types are available up to 28 Vdc input voltage.
| External diameter (max) | 30 mm |
| Shaft diameter (max) | 6 mm |
| Resolution (max) | 2.500 ppr |
| Output frequency (max) | 220 kHz |
| Operating temperature (°C) | -25… +85 |
| Enclosure rating | IP 54 |
EL – ER 58 Optical Solid Shaft
Solid shaft rotary incremental EL 58 – ER 58 (ø 58 mm) encoder series, for industrial applications with high mechanical resistance requirements. These encoders are designed to support high radial and axial shaft load and they can be mounted using flanges or servo-fasteners.
| External diameter (max) | 58 mm |
| Shaft diameter (max) | 12 mm |
| Resolution (max) | 24.000 ppr |
| Output frequency (max) | 500 kHz |
| Operating temperature (°C) | -25 … +85 |
| Enclosure rating | IP 66 |
EH 17 – EH 30 MH Optical Blind
This new model represents an extension of the EH 17 – EH 30 series; it is a miniaturized incremental kit encoder, ideal for the integration on small size AC/DC motors, stepper motors and for applications that require reduced dimensions. The series has been improved with a significant increase of resolution (5.000 ppr), temperature range (-20° … +85°C) and rotation speed (10.000 rpm), while maintaining the features of easy assembly and no wear.
| External diameter (max) | 30 mm |
| Shaft diameter (max) | 6,35 mm |
| Resolution (max) | 5.000 ppr |
| Output frequency (max) | 500 kHz |
| Operating temperature (°C) | -20 … +85 |
| Enclosure rating | IP 54 |
EF 36 Optical Blind
Miniaturized EF 36 K (ø 36 mm) encoder series with “Hall effect” phases integrated, recommended in feedback control systems on AC servomotors. This series stands out for its interchangeability with the size 15 Resolver, which allows easy and cost-effective mounting.
| External diameter (max) | 36 mm |
| Shaft diameter (max) | 10 mm |
| Resolution (max) | 1.024 ppr |
| Output frequency (max) | 150 kHz |
| Operating temperature (°C) | -10 … +85 |
| Enclosure rating | IP 40 |
EMI22 Magnetic incremental
EMI 22 (ø 22 mm) miniaturized magnetic incremental encoder series, resistant to a wide range of temperature and high operating speed. Suitable for several application fields like electric motors, marine industry, iron and steel industry, textile machines, wood, paper, glass, marble working machinery and, more generally, automation and process control fields.
| External diameter (max) | 22 mm |
| Shaft diameter (max) | 10 mm |
| Resolution (max) | 2.048 ppr |
| Output frequency (max) | 205 kHz |
| Operating temperature (°C) | -40 … +125 |
| Enclosure rating | IP 67 |
EMI 38 Magnetic incremental
Thanks to the magnetic technology, the EMI 38 (ø 39,5 mm) series is suitable for harsh environment applications such as marble and glass working machines, washing systems, and generally for industrial automation. For its small size, EMI 38 is recommended wherever a minimal amount of space is required.
| External diameter (max) | 39,5 mm |
| Shaft diameter (max) | 10 mm |
| Resolution (max) | 10.000 ppr |
| Output frequency (max) | 800 kHz |
| Operating temperature (°C) | -25 … +100 |
| Enclosure rating | IP 67 |
| Linearity | < 0,3° / ± 0,5° |
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