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ENA1J-B28-N00128 Datasheet PDF - Bourns

Part Number ENA1J-B28-N00128
Description Rotary Optical Encoder
Manufacturers Bourns 
Logo Bourns Logo 

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Features
Two channel quadrature output
Bushing or servo mount
Square wave signal
Small size
Resolution to 256 PPR
CMOS and TTL compatible
Long life
Ball bearing option for high operating
speed up to 3000 rpm
RoHS compliant*
EN - Rotary Optical Encoder
Electrical Characteristics
Output................................................................................... 2-bit quadrature code, Channel A leads Channel B by 90 º (electrical) with clockwise rotation
Resolution............................................................................................................................................................................... 25 to 256 cycles per revolution
Insulation Resistance (500 VDC) .................................................................................................................................................................. 1,000 megohms
Electrical Travel .....................................................................................................................................................................................................Continuous
Supply Voltage.........................................................................................................................................................................................5.0 VDC ±0.25 VDC
Supply Current.............................................................................................................................................................................................. 26 mA maximum
Output Voltage
Low Output .................................................................................................................................................................................................0.8 V maximum
High Output.....................................................................................................................................................................................................4 V minimum
Output Current
Low Output ................................................................................................................................................................................................ 25 mA minimum
Rise/Fall Time..................................................................................................................................................................................................200 ns (typical)
Shaft RPM (Ball Bearing) ....................................................................................................................................................................... 3,000 rpm maximum
Power Consumption .................................................................................................................................................................................. 136 mW maximum
Pulse Width (Electrical Degrees, Each Channel) ............................................................................................................................................180 º ±45 º typ.
Pulse Width (Index Channel)................................................................................................................................................................................. 360 º ±90 º
Phase (Electrical Degrees, Channel A to Channel B)........................................................................................................................................90 º ±45 º typ.
Environmental Characteristics
Operating Temperature Range .......................................................................................................................................-40 ºC to +75 ºC (-40 °F to +167 °F)
Storage Temperature Range ..........................................................................................................................................-40 °C to +85 °C (-40 °F to +185 °F)
Humidity................................................................................................................................................................. MIL-STD-202, Method 103B, Condition B
Vibration ............................................................................................................................................................................................................................ 5 G
Shock............................................................................................................................................................................................................................... 50 G
Rotational Life
A & C Bushings (300 rpm maximum)**............................................................................................................................................10,000,000 revolutions
W, S & T Bushings (3,000 rpm maximum)**..................................................................................................................................200,000,000 revolutions
IP Rating..........................................................................................................................................................................................................................IP 40
Mechanical Characteristics
Mechanical Angle ........................................................................................................................................................................................ 360 ° Continuous
Torque (Starting and Running)
A & C Bushings (Spring Loaded for Optimum Feel) ..............................................................................................................1 N-cm (1.5 oz-in.) maximum
W, S & T Bushings (Ball Bearing Shaft Support) ..............................................................................................................0.07 N-cm (0.1 oz-in.) maximum
Mounting Torque...................................................................................................................................................1.7 to 2.0 N-cm (15 to 18 lb.-in.) maximum
Shaft End Play.................................................................................................................................................................. 0.30 mm (0.012 ”) T.I.R. maximum
Shaft Radial Play .............................................................................................................................................................. 0.12 mm (0.005 ”) T.I.R. maximum
Weight .......................................................................................................................................................................................................... 11 gms. (0.4 oz.)
Terminals ......................................................................................................................................................................Axial or radial pc pins or ribbon cable
Soldering Condition
Manual Soldering................................................................................................................... 96.5Sn/3.0Ag/0.5Cu solid wire or no-clean rosin cored wire
370 °C (700 °F) max. for 3 seconds
Wave Soldering ...........................................................................................................................................96.5Sn/3.0Ag/0.5Cu solder with no-clean flux
260 °C (500 °F) max. for 5 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.
**For resolutions 128 quadrature cycles per shaft revolution.
Quadrature Output Table
OUTPUT VOLTAGE
Channel A
Channel B
1 cycle
360 ° ± 90 °
Clockwise rotation
STANDARD RESOLUTIONS AVAILABLE
(Full quadrature output cycles per shaft revolution)
25* 125
50* 128
64 200
100 256
For Non-Standard Resolutions—Consult Factory
* Channel B leads Channel A
*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.



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