S6

This product has been succeeded by the S6 Optical Shaft Encoder.

This next generation product is highly recommended for all new designs and applications. Learn more »

S2 Optical Kit Encoder

Please see the EM1 Component Change Notice.
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  • S2 Optical Kit Encoder
  • S2 Optical Kit Encoder
  • S2 Optical Kit Encoder
  • S2 Optical Kit Encoder

Overview

  • Small size
  • Low cost
  • 2-channel quadrature, TTL square wave outputs
  • 3rd channel index option
  • Tracks from 0 to 300000 cycles/sec
  • Ball bearing option tracks to 10,000 RPM
  • -40 to +100C operating temperature
  • Single +5V supply

The S2 series high resolution optical shaft encoder is a non-contacting rotary to digital converter. Useful for position feedback or manual interface, the encoder converts real-time shaft angle, speed, and direction into...

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Product Specifications

ParameterValueUnits
Operating Temperature -40 to 100 C
Vibration (5Hz to 2kHz) 20 G
Electrostatic Discharge, Human Body Model
 ± 4
 kV
ParameterSleeve Bushing Ball Bearing
Max. Acceleration 250000 rad/sec² 250000 rad/sec²
Max. Shaft Speed 100 rpm 10000 rpm
Max. Shaft Torque 0.5 ±0.2 in-oz
0.3 in-oz (N-option)		 0.05 in-oz
Max. Shaft Loading 2 lbs. dynamic
20 lbs. static		 1 lb.
Bearing Life > 1000000 revolutions L10 = (19.3/Fr)³ *
Where L10 = bearing life in millions of revs, and
Fr = radial shaft loading in pounds
Weight 1.28 oz. 1.28 oz.
Max. Shaft Total Indicated Runout 0.0015 in. 0.0015 in.
Max. Panel Nut Tightening Torque 20 in-lbs 20 in-lbs

* only valid with negligible axial shaft loading.

B leads A for clockwise shaft rotation, and A leads B for counterclockwise rotation viewed from the shaft side of the encoder (see the EM1 page).

  • Specifications apply over entire operating temperature range.
  • Typical values are specified at Vcc = 5.0Vdc and 25°C.
  • For complete details, see the EM1 product page.
ParameterMin.Typ.Max.UnitsConditions
Supply Voltage 4.5  5.0 5.5 V  
Supply Current   27 30 mA CPR < 1000, no load 
  55 57 mA CPR ≥ 1000, no load
Low-level Output     0.5 V IOL = 8mA max.
High-level Output 2.0     V IOH = -8mA max.
4.2 4.8   V no load
Output Current Per Channel -8   8 mA
Output Rise Time   110   nS  
Output Fall Time   35   nS  
PinDescription
1 Ground
2 Index
3 A channel
4 +5VDC power
5 B channel

Product Description

Restriction of Hazardous Substances

The S2 series high resolution optical shaft encoder is a non-contacting rotary to digital converter. Useful for position feedback or manual interface, the encoder converts real-time shaft angle, speed, and direction into TTL-compatible quadrature outputs with or without index. The encoder utilizes an unbreakable mylar disk, metal shaft and bushing, LED light source, and monolithic electronics. It operates from a single +5VDC supply.

The S2 is our first generation ball bearing optical shaft encoder and is available for those customers who have designed it into their products; however, the S6 is recommended for new designs in place of the S2.


The S2 is normally designed for applications of 10 feet or less. For longer cable lengths, adding a PC4 / PC5 differential line driver is recommended.

Three shaft torque versions are available. The standard torque version has a sleeve bushing lubricated with a viscous motion control gel to provide torque and feel that is ideal for front panel human interface applications.

The no torque added option has a sleeve bushing and a low viscosity lubricant (that does not intentionally add torque) for low RPM applications where a small amount of torque is acceptable.

The ball bearing version uses miniature precision ball bearings that are suitable for high speed and ultra low torque applications.

Connection to the S2 series encoder is made through a 5-pin standard connector (sold separately). The mating connectors are available from US Digital with several cable options and lengths.

Related
Product Notes
  • Cables and connectors are not included and must be ordered separately.
  • For ordering information please see the Compatible Cables / Connectors section above.
  • US Digital warrants its products against defects in materials and workmanship for two years. See complete warranty for details.

Purchasing

Configure and Purchase

1. CPR






2. Shaft


3. Index


4. Torque



5. Housing


Product Part Number

This product requires configuration. Please supply the product options above.

Quantity Base Price
1 $65.85
10 $56.87
50 $50.37
100 $47.06
Over 100 Call for quote
Quantity
Unit Price

$65.85

Subtotal

$65.85

For your convenience, use the above part number to order via phone 800.736.0194

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