S4 Miniature Optical Shaft Encoder
S4 Features
- Miniature size
- Low High retention snap-in polarized connector
- Tracks from 0 to 30,000 cycles/sec
- Ball bearing option tracks up to 10,000 RPM
- Wide operating temperatures
- 100 to 360 cycles per revolution (CPR)
- 400 to 1,440 pulses per revolution (PPR)
- 2 channel quadrature TTL squarewave outputs
See more info below
Configure the S4
The S4 is no longer available for purchase.
The S4 is no longer available for purchase, and has been replaced by our recently released S4T Miniature Optical Shaft Encoder. The S4T is a redesigned, enhanced version of the S4, and is already available for purchase.
S4 Product Description
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 a 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 Specifications
View here or download the specifications
Environmental
| Parameter | Value | Units |
|---|---|---|
| Vibration (5Hz to 2kHz) | 20 | G |
| Operating Temperature | -20 to 100 | C |
| Electrostatic Discharge, IEC 61000-4-2 Single-ended (S-option) Differential (D-option) |
± 3 ± 15 |
kV |
Mechanical
| Specification | Sleeve Bushing | Ball 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 (D-option) 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.
Phase Relationship
| Parameter | Typ. | 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.
Single-ended Electrical
| Specifications | Min. | Typ. | Max. | Units | Notes |
|---|---|---|---|---|---|
| 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 |
Differential Electrical
| Specifications | Min. | Typ. | Max. | Units | Notes |
|---|---|---|---|---|---|
| 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 |
Product Change Notifications
| Title | Date | Description | Download |
|---|---|---|---|
| E4, E4P, S4 - PCN 5741 | 05/09/2016 | As part of our on-going product lifecycle management process, we have identified products that will be transitioned to an "End-of-Life" status. Products targeted for end-of-life may be available for a last time buy option prior to being made obsolete, however quantities are limited and special requirements may apply. | 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 |
Additional Information
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.
Downloads Available
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3D Model Downloads
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(Note: The formats below will become links if there are 3D models available.)
- SolidWorks format
- IGES format
- Parasolid format
- STEP format
Related Products & Accessories
The following are related products for the S4
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