Quantum Devices Model LP12 optical encoder provides an improved feedback solution in applications typically using modular encoders. With an overall height of less than one inch and the stability of a bearing encoder design, model LP12 can provide significant performance upgrades in applications limited by traditional modular encoder solutions. Outputs consist of a quadrature with index pulse (incremental or sinusoidal) and three-phase commutation. A flexible member allows for much greater tail shaft run out and TIR than can be tolerated by modular encoder designs, plus it provides 30 degrees of rotation for commutation timing. Use LP12 with our QC201 Commutation Indicator for quick and accurate motor encoder alignment.
Contact Quantum Devices for custom configurations.
| Input Voltage | 5 VDC ± 5% |
|---|---|
| Input Current Requirements | 65 mA typical, 100 mA max plus interface loads |
| Input Ripple | 2% peak to peak @ 5 VDC |
| Output Circuits | A = 26C31 line driver (RS-422 or single-ended TTL) B = ABZ 26C31 line driver, UVW open collector (no U’ V’ W’) |
| Incremental Output Format | Quadrature with A leading B for CW rotation Index pulse true over A and B high |
| Max Operating Frequency | 500 kHz |
| Symmetry | 180° electrical ± 10% typical |
| Minimum Edge Separation | <4000 PPR = 54° electrical ≥4000 PPR = 45° electrical |
| Commutation Format | Three phase 4, 6 or 8 poles (other pole counts upon request) |
| Commutation Accuracy | ± 1° mechanical |
| Z Channel to U Channel | ± 1° mechanical |
| Input Voltage | 5 VDC ± 5% |
|---|---|
| Input Current Requirements | 65 mA typical, 100 mA max plus interface loads |
| Input Ripple | 2% peak to peak @ 5 VDC |
| Output Circuits | C = sine/cosine 1 Vpp (measured differentially), index**, UVW 26C31 line driver (RS-422 or single-ended TTL) D = sine/cosine 1 Vpp (measured differentially), index**, UVW open collector (no U’ V’ W’) |
| Incremental Output Format | Quadrature sine/cosine with sine leading cosine for CW rotation. Ungated index pulse. |
| Max Operating Frequency | 500 kHz |
| Sine/Cosine Amplitude | 1 Vpp ± 5% (measured differentially) |
| Index Amplitude ** | C = 1 Vpp ± 5% (measured differentially) square wave D = 1 Vpp ± 5% (measured differentially) sinusoidal |
| Commutation Format | Three phase 4, 6 or 8 poles (other pole counts upon request) |
| Commutation Accuracy | ± 1° mechanical |
| Z channel to U channel | ± 1° mechanical |
| Storage Temperature | -40 to 125°C |
|---|---|
| Operating Temperature | -20 to 115°C |
| IP Rating | IP40 |
| Humidity | 90% non-condensing |
| Vibration | 20 g's @ 50 to 500 CPS |
| Shock | 50 g's @ 11 ms duration |
| Bore Diameter (Tolerance) | 0.125", 0.1875", 0.250", 0.3125", 3 mm, 4 mm, 5 mm, 6 mm, 8 mm (+0.0006/-0.0000") |
|---|---|
| Recommended Shaft Engagement | 0.750” minimum |
| Allowable Shaft Runout | 0.007" TIR |
| Axial Shaft Movement | ± 0.030" |
| Maximum Shaft Speed | 8000 RPM |
| Interface Connector | Connector: JAE P/N FI-W15P-HFE |
| Mounting | 1.280”, 1.575”, 1.812” Bolt Circle |
| Moment of Inertia | 9.1 x 10⁻⁵ oz·in·s² |
| Acceleration | 1x10⁵ radians/s² |
| Accuracy | Instrument error 1.5 arc minutes max |
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Consult factory for configurations not shown (e.g. resolution, commutation, etc.).
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