US Digital

S4 Miniature Optical Shaft Encoder

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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
  • -10 to +85C operating temperature
  • 100 to 360 cycles per revolution (CPR)
  • 400 to 1440 pulses per revolution (PPR)
  • 2 channel quadrature TTL squarewave outputs
  • Low power strobe option available

The S4 miniature optical shaft encoder is a non-contacting rotary to digital converter. Useful for position feedback or manual interface, the encoder converts...

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Product Specifications

SpecificationSleeve BushingBall Bearing
Acceleration 10,000 rad/sec² 250,000 rad/sec²
Vibration 20 g. 5 to 2KHz 20 g. 5 to 2KHz
Shaft Speed 100 RPM max. continuous 15,000 RPM max. continuous
Shaft Torque 0.5 ±0.2 in. oz.
0.3 in. oz. max. (N-option)		 0.05 in. oz.
Shaft Loading 2 lbs. max. dynamic
20 lbs. max. static		 1 lb. max.
Bearing Life > 1,000,000 revolutions (40/P)³ = life in millions of revs.
where P = radial load in pounds
Weight 0.46 oz. 0.42 oz.
Shaft Runout 0.0015 T.I.R. max. 0.0015 T.I.R. max.
Shaft Brass or Stainless
Bushing Brass
Connector Gold plated
Hole Diameter 0.375" +0.005 - 0
Panel Thickness 0.125 in. max.
Panel Nut Max. Torque 20 in.-lbs.

B leads A for clockwise shaft rotation, A leads B for counter clockwise shaft rotation viewed from the shaft/bushing side of the encoder (see the AEDR page).

For complete details see the AEDR page.

Pin Description
1 +5VDC power
2 A channel
3 Ground
4 B channel

Product Description

Restriction of Hazardous Substances

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 L-option can have the power strobed on just long enough to read the A/B outputs to reduce average power consumption. It is identical to a standard S4 except that the internal bypass capacitor is not installed. The output settling time is typically 400 nsec. after power up. The S4 should be sampled faster than
(Max. RPM * CPR / 10) Hz in this case to avoid aliasing of the quadrature waveform.

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.
Related

Purchasing

Configure and Purchase

1. CPR
2. Shaft



3. Torque



4. Power


Product Part Number
Quantity Price
1 $51.65
10 $43.46
50 $38.53
100 $34.24
Over 100 Call for quote
Quantity
Unit Price

$51.65

Subtotal

$51.65

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

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