S4 Miniature Optical Shaft Encoder

The S4 is not recommended for new product development. Please contact sales@usdigital.com for information regarding new product applications.
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  • S4 Miniature Optical Shaft Encoder
  • S4 Miniature Optical Shaft Encoder
  • S4 Miniature Optical Shaft Encoder

Overview

  • Miniature size
  • Low cost
  • High retention snap-in polarized connector
  • Tracks from 0 to 30,000 cycles/sec
  • Ball bearing option tracks up to 7,000 or 15,000 RPM
  • -20 to +100C operating temperature
  • 100 to 360 cycles per revolution (CPR)
  • 400 to 1440 pulses per revolution (PPR)
  • 2 channel quadrature TTL squarewave outputs

On January 16, 2012, the S4 part number was modified. The S4 optical encoder is now offered with a differential output option; as a result, the S4 part number was changed to accommodate either the...

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Product Specifications

ParameterValueUnits
Vibration (5Hz to 2kHz) 20 G
Max. Relative Humidity 90 %
Storage Temperature -40 to 100 C
Operating Temperature -20 to 100 C
Electrostatic Discharge, Human Body Model 
Single-ended (S-option)
Differential (D-option)

± 3
± 15

kV

 

SpecificationSleeve BushingBall Bearing
Max. Acceleration 10000 rad/sec² 250000 rad/sec²
Max. Shaft Speed 100 rpm 15000 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 > 1,000,000 revolutions L10 = (22/Fr)³ *
Where L10 = bearing life in millions of revs, and
Fr = radial shaft loading in pounds
Weight 0.46 oz. 0.42 oz.
Max. Shaft Total Indicated Runout 0.0015 in. 0.0015 in.
Max. Panel Nut Tightening Torque 20 in-lbs 20 in-lbs
Technical Bulletin TB1001 - Shaft and Bore Tolerances Download

* only valid with negligible axial shaft loading.

 e_series_output_2.gif

ParameterTyp.Max.Units
Symmetry, S 180 ± 16 180 ± 75 electrical degrees
Quadrature Delay, Q 90 ± 10 90 ± 60 electrical degrees

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

(2) Typical values represent the encoder performance at typical mounting alignment, whereas the maximum values represent the encoder performance across the range of recommended mounting tolerance.

SpecificationsMin.Typ.Max.UnitsNotes
Supply Voltage 4.5 5.0 5.5 V  
Supply Current   21 27 mA no load
Low-level Output     0.4 V IOL = 6 mA
High-level Output 2.4     V IOH = -1 mA
Rise Time   500   ns CL = 25 pF, RL = 2.7 kΩ
Fall Time   100   ns
SpecificationsMin.Typ.Max.UnitsNotes
Supply Voltage 4.5 5.0 5.5 V  
Supply Current   23 29 mA no load
Differential Output Voltage 3.0 3.8   V RL = 100 ohm
Differential Output Rise/Fall Time     20 ns
4-pin Single-ended (1)6-pin Differential (2)
PinDescriptionPinDescription
1 +5VDC power 1 Ground
2 A channel 2 A channel
3 Ground 3 A- channel
4 B channel 4 +5VDC power
    5 B channel
    6 B- channel

(1) 4-pin single-ended mating connector is CON-MIC4
(2) 6-pin differential mating connector is CON-MIC6

Title Date Description Download
E4 - E4P - S4 Update - PCN 1014 11/29/2011 We have modifed the E4, E4P and S4 product lines in order to improve the performance and durability of the encoder. Changes include new molds for the plastic base and cover parts with an over-molded bushing in the S4 base, a new SMT connector (compatible with current mating connector), and a modified PCB profile to accommodate the new connector and plastic part modifications. Download

Product Description

Restriction of Hazardous Substances

On January 16, 2012, the S4 part number was modified. The S4 optical encoder is now offered with a differential output option; as a result, the S4 part number was changed to accommodate either the single ended or differential output options. The S4 part number also has a place holder added for a possible future index option. The index option is currently not available and there is not a projected date at which it will be made available. The current "Power" option for the S4 was also removed from the part number. The power option is very rarely selected and therefore is being eliminated from the S4 part number. 

The S4 miniature 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 without index. The encoder utilizes an unbreakable mylar disk, metal shaft, and bushing or bearing. It operates from a single +5VDC supply.  

The S4 encoder is available with ball bearings for motion control applications, or static drag to feel like a potentiometer for front-panel manual interface.

The reflective sensor incorporates an LED light source and a monolithic photo detector with signal shaping electronics, providing two channel bounceless quadrature TTL outputs.

The S4 can be connected by using a high retention 4 conductor snap-in polarized 1.25mm pitch connector. The mating connector is polarized and should attach smoothly to the encoder; do not force. See below for Cables & Connectors.   

Product Notes
  • 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.

Cable/connector assembly not included and must be ordered separately.

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Purchasing

Configure and Purchase

Please contact customer service for pricing and configuration at 800.736.0194.