S1 Features
- Shafted rotary encoder
- 26 Resolutions from 32-5,000 CPR (128-20,000 PPR)
- Two shaft sizes: 6 mm , 1/4 in.
- Three torque options
- 2 channel quadrature TTL square wave output
- Optional Index channel
- High-retention connector/cable (sold separately)
US Digital S1 Rotary Shaft Encoder Description
The S1 optical shaft encoder converts shaft position or speed into a quadrature output signal. This rotary encoder delivers up to 20,000 PPR resolution in a glass-filled polymer housing. Available in two shaft sizes: 6 mm, 1/4 in.
US Digital offers three different torque options for various uses:
- Default (-D): sleeve bushing with higher damping for human interface applications.
- Ball bearing (-B): miniature precision ball bearings suitable for high-speed applications.
- Light static drag (-N): sleeve bushing with lower damping for low-speed applications.
The S1 rotary encoder is designed to drive cables up to 10 feet long. For longer cable lengths, we recommend using the model S5 and selecting the differential output. Another option is to add a PC4/PC5 differential line driver to this encoder.
This incremental encoder is designed for use with a high-retention connector. After you make your selections in the Product Configurator, compatible cables and connectors will be displayed below and must be ordered separately.
Mechanical Drawings
Specifications
ENVIRONMENTAL
| PARAMETER | VALUE | UNITS |
|---|---|---|
| Operating Temperature, CPR < 2000 | -40 to 100 | C |
| Operating Temperature, CPR ≥ 2000 | -25 to 100 | C |
| Electrostatic Discharge, IEC 61000-4-2 | ± 4 | kV |
| Vibration (10Hz to 2kHz, sinusoidal) | 20 | G |
| Shock (6 milliseconds, half-sine) | 75 | G |
MECHANICAL
| PARAMETER | SLEEVE BUSHING | BALL BEARING |
|---|---|---|
| Max. Acceleration | 250000 rad/sec² | 250000 rad/sec² |
| Max. Shaft Speed (mechanical) | 100 rpm (1) | 10000 rpm (1) |
| Max. Shaft Torque | 0.5 in-oz (D-option) 0.3 in-oz (N-option) |
0.05 in-oz (B-option) |
| 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 | 0.70 oz. | 0.70 oz. |
| Max. Shaft Runout | 0.0015 in. T.I.R. | 0.0015 in. T.I.R. |
| 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.
(1) The maximum speed due to electrical considerations is dependent on the CPR. See the EM1 or EM2 product pages.
PHASE RELATIONSHIP
B leads A for clockwise shaft rotation, and A leads B for counterclockwise rotation when viewed from the shaft side of the encoder.
ELECTRICAL
- Specifications apply over the entire operating temperature range.
- Typical values are specified at Vcc = 5.0Vdc and 25°C.
- For complete details, see the EM1 or EM2 product pages.
| PARAMETER | MIN. | TYP. | MAX. | UNITS | CONDITIONS |
|---|---|---|---|---|---|
| Supply Voltage | 4.5 | 5.0 | 5.5 | V | |
| Supply Current | 27 | 33 | mA | CPR < 500, no load | |
| 54 | 62 | mA | CPR ≥ 500 and < 2000, no load | ||
| 72 | 85 | mA | CPR ≥ 2000, no load | ||
| Low-level Output | 0.5 | V | IOL = 8mA max., CPR < 2000 | ||
| 0.5 | V | IOL = 5mA max., CPR ≥ 2000 | |||
| 0.25 | V | no load, CPR ≥ 2000 | |||
| High-level Output | 2.0 | V | IOH = -8mA max. and CPR < 2000 | ||
| 2.0 | V | IOH = -5mA max. and CPR ≥ 2000 | |||
| 4.8 | V | no load and CPR < 2000 | |||
| 3.5 | V | no load and CPR ≥ 2000 | |||
| Output Current Per Channel | -8 | 8 | mA | CPR < 2000 | |
| -5 | 5 | mA | CPR ≥ 2000 | ||
| Output Rise Time | 110 | nS | CPR < 2000 | ||
| 50 | nS | CPR ≥ 2000, ± 5mA load | |||
| Output Fall Time | 100 | nS | CPR < 2000 | ||
| 50 | nS | CPR ≥ 2000, ± 5mA load |
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.
Configuration Options |
||||||||||||||||||||||||||||||||||||||||||||
| S1 | - | CPR (Cycles Per Revolution) 32 50 96 100 120 192 200 250 256 360 400 500 512 540 720 800 900 1000 1024 1250 2000 2048 2500 4000 4096 5000 | - | Shaft Diameter 236 (6mm) 250 (1/4") | - | Index IE (Index) NE (Non-Index) | - | Torque D (Default Torque) B (Ball Bearing) N (Light Static Drag) | - | Housing D (Default) | ||||||||||||||||||||||||||||||||||
|
PLEASE NOTE: This chart is for informational use only. Certain product configuration combinations are not available. Visit the S1 product page for pricing and additional information. |
||||||||||||||||||||||||||||||||||||||||||||