HOMEABOUT PRODUCTS SERVICES CONTACT HOMEPRODUCTSOPTICAL ENCODERSOE-39C SERIES Optical Encoders OE-39C Concentric Shaft Encoder OE-39C SERIES OVERVIEW TECHNICAL SPECS DOWNLOAD GALLERY OE-39C SERIES Concentric Shaft Encoder Two Channels With Standard Quadrature 2-Bit Code The Series OE-39 rotary encoder switches use quadrature output (2-bit repeating gray code). In a quadrature rotary optical encoder two detectors are used to provide output “A” and “B”. The code rotor either blocks the infrared light or allows it to pass to the detectors. As the shaft turns the rotor, the output changes state to indicate position. The resulting output is two square waves that are 90° out of phase. External pull-up resistors from each output to the power source are needed when interfacing with an open collector output to provide the output with the high state voltage when the photo transistor is “off”. Base current is supplied in a photo transistor when light strikes the detector effectively grounding the output. This “on” or “off” digital arrangement allows the open collector to interface with commonly used integrated circuit technologies such as TTL, TTL LS, CMOS and HCMOS. QUICK LINKS Rotary Switches Keylock Switches Illuminated Switches Optical Encoders Custom Switches By Applications By Customizations Support CONTACT US The Innovative Switch Company P.O. Box 25063 Santa Ana, CA 92799-5063 ISO 9001:2015 AS9100:2016 Rev. D Certified Email: sales@cole-switches.com Tel: +714-556-3100 Customize Quote More Optical Encoders OPTICAL ENCODERS OE-39TCT Series OPTICAL ENCODERS OE-39C Series OPTICAL ENCODERS OE-39H&S Series PREV NEXT Founded in 1965, Cole has earned a world class reputation for designing and manufacturing high quality, precision rotary switches for Commercial, Aerospace and Military applications. The Innovative Switch Company ISO 9001:2015 AS9100:2016 Rev. D Certified Email: sales@cole-switches.com Tel: +714-556-3100 Locations HEADQUARTERS 2650 South Croddy Way Santa Ana, CA 92704 MANUFACTURING 2711 South Shannon Street Santa Ana, CA 92704 Products Rotary Switches Keylock Switches Illuminated Switches Optical Encoders Avionic Panel Custom Switches COLE AVIONICS REPAIR Your trusted partner for engine starter switch repair. Visit ©2021 Cole Instrument Corp. All Rights Reserved. For all comments & questions sales@cole-switches.com