Bourns 5V dc 128 Pulse Optical Encoder with a 6.35 mm Round Shaft, Bracket Mount
- RS Stock No.:
- 2632889
- Mfr. Prt No.:
- ENA1J-B28-L00128L
- Brand:
- Bourns
Technical Reference
Legislation and Compliance
RoHS Certificate of Compliance
EU Directives 2011/65/EU and 2015/863 restrict the use of the 10 substances below in the manufacture of specified types of electrical equipment.
Whilst this restriction does not legally apply to components, it is recognised that component “compliance” is relevant to many customers.
RS definition of RoHS Compliance:
- The product does not contain any of the restricted substances in concentrations and applications banned by the Directive,
- and for components, the product is capable of being worked on at the higher temperatures required by lead–free soldering
The restricted substances and maximum allowed concentrations in the homogenous material are, by weight:
| Substance | Concentration |
| Lead | 0.1% |
| Mercury | 0.1% |
| PBB (Polybrominated Biphenyls) | 0.1% |
| PBDE ( Polybrominated Diphenyl Ethers) | 0.1% |
| Hexavalent Chromium | 0.1% |
| Cadmium | 0.01% |
| DEHP (Bis (2-Ethylhexl) phthalate) | 0.1% |
| BBP (Benzyl butyl phthalate) | 0.1% |
| DBP (Dibutyl phthalate) | 0.1% |
| DIBP (Diisobutyl phthalate) | 0.1% |
The supplier of the item listed below has informed RS Components that the product is "RoHS Compliant".
RS Components has taken all reasonable steps to confirm this statement. Information relates only to products sold on or after the date of this certificate.
| RS stock number | 2632889 |
| Product description | Bourns 5V dc 128 Pulse Optical Encoder with a 6.35 mm Round Shaft, Bracket Mount |
| Manufacturer / Brand | Bourns |
| Manufacturer part number | ENA1J-B28-L00128L |
RS Components Ltd, Birchington Road, Corby, Northants, NN17 9RS, UK
Statement of Conformity
This statement confirms that the product detailed below complies with the specifications currently published in the RS media and has been subject to the strict quality conditions imposed by RS Components’ internal management systems. Furthermore and where applicable, it confirms that all relevant semiconductor devices have been handled and packed under conditions that meet the administrative and technical requirements of ANSI/ESD S20.20 and EN61340-5-1 electrostatics control standards.
| RS stock number | 2632889 |
| Product description | Bourns 5V dc 128 Pulse Optical Encoder with a 6.35 mm Round Shaft, Bracket Mount |
| Manufacturer / Brand | Bourns |
| Manufacturer part number | ENA1J-B28-L00128L |
The foregoing information relates to product sold on, or after, the date shown below.
RS COMPONENTS
| Date | Dec 27, 2024 |
RS Components Pte Ltd Robinson Road, P.O. Box 1582, Singapore 903132
Product Details
EN Series Rotary Optical Encoder
EN series rotary optical encoders with two channel quadrature output, a square wave signal and a resolution to 256 PPR. These EN series rotary optical encoders are bushing or servo mount, CMOS and TTL compatible and have a long life of 10,000,000 revolutions. Versions with a ball bearing bushing configuration (stock numbers 164-2633, 789-9501, 789-9501 and 827-5029) have an increased life of 200,000,000 revolutions as well as a high operating speed of 3000 rpm. Typical applications for these rotary optical encoders include digital panel control or position sensing where reliability, long life, high resolution and precision linearity are essential.
Features & Benefits
2-bit quadrature output, channel A leads channel B by 90° with clockwise rotation
Metal bushing and shaft, long life, high operating speed
Square wave signal, CMOS and TTL compatible
64, 128 or 256 cycles per revolution
ENA types have bush mounting (spring loaded for optimum feel)
ENS type has bush mounting (ball bearing shaft support)
Continuous mechanical rotation
Product Application Information
Typical applications for these rotary optical encoders include digital panel control or position sensing where reliability, long life, high resolution and precision linearity are essential.
Specifications
| Attribute | Value |
| Brand | Bourns |
| Encoder Signal | Digital Square Wave |
| Shaft Length | 22.23 mm |
| Mounting Hole Diameter | 9.5 mm |
| Mounting Type | Bracket Mount |
| Maximum Operating Speed | 3000 rpm |
| Shaft Style | Round |
| Shaft Diameter | 6.35 mm |
| Supply Voltage | 5 V dc |
| Pulses Per Revolution | 128 |
| Encoder Reading | Incremental |
| Current Rating | 26 mA |