Incremental, singleturn, optical
Shaft type
Shaft & bore Ø [mm]
6, 6.35
Resolution [CPR] Incremental
Case Ø [mm]
Supply voltage [V]
Incremental Signals
Temp. range [°C]
-40 to 100 (-25 for CPR 2000+)
US Digital
Product description

The S1 series 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 with or without index. The encoder utilizes a mylar disk, metal shaft and bushing, LED light source, and monolithic electronics. It operates from a single +5VDC supply. The S1 is normally designed for applications of 10 feet or less. For longer cable lengths, adding a PC4 / PC5 differential line driver is recommended. Three shaft torque versions are available. The standard torque version has a sleeve bushing lubricated with a viscous motion control gel to provide torque and feel that is ideal for front panel human interface applications. The no torque added option has a sleeve bushing and a low viscosity lubricant (that does not intentionally add torque) for low RPM applications where a small amount of torque is acceptable. The ball bearing version uses miniature precision ball bearings that are suitable for high speed and ultra low torque applications. Connection to the S1 series encoder is made through a 5-pin standard connector (sold separately). The mating connectors are available from US Digital with several cable options and lengths.

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