: Optical Encoders

OE-39C Series

OE-39C SERIES

Concentric Shaft Encoder Two Channels With Standard Quadrature 2-Bit Code

OE-39C SERIES

Concentric Shaft Encoder Two Channels With Standard Quadrature 2-Bit Code

Coding	2 bit quadrature
Operating Voltage	5.0 ± .5 VDC
Supply Current	30 mA max. @ 5 VDC
Logic Low Maximum	0.5 V
Logic High Minimum	2.5 V
Logic Rise/Fall Time	<30ms @ 16.6 rpm
Switching Life	100,000 cycles (1,000,000 available)
Weight	21 grams

Contact Surfaces	Gold Plated
Vibration Tested	YES
High Impact Shock Tested	YES
Moisture Resistant	YES
Salt Spray Resistant	YES
Explosion Proof	YES
Immersion Tested	YES
RFI/EMI Tested	YES
Push Button	Available
Concentric Shaft	Available
Shaft Seal	Available
Panel Seal	Available

OE-39C SERIES

Concentric Shaft Encoder Two Channels With Standard Quadrature 2-Bit Code

Information Packet Includes:

Description
Product Photos
Engineering Drawings
Ordering Information
Technical Data
Information on all Optical Encoders
OE-39H & S Series
OE-39H/S22 Absolute Positioning Encoder
OE-39 TCT &TCN Tricentric Shafts Encoder
OE-39C Concentric Shaft Encoder
OE-36 High Resolution Series

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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.