Optical Rotary Encoders

Incremental Encoders, Absolute Encoders, Encoder Accessories

What's New! ... Additional Light Duty and Medium Duty Incremental Encoders

TRD-MX Series - Light Duty Metric-Dimension Encoders
TRDA-2E Series - Light Duty SAE-Dimension Encoders
TRDA-20 Series - Medium Duty SAE-Dimension Encoders
TRDA-25 Series - Medium Duty SAE-Dimension Encoders with MS Connector

What's New! ... "Hi-PPR" Encoders up to 5,000 Pulses Per Revolution

TRDA-N Series - Medium Duty 8mm Solid Shaft Encoders
TRDA-NH Series - Medium Duty 8mm Hollow Shaft Encoders

Encoders are used in all types of motion sensing applications, including machine tooling, semiconductor positioning and multi-axis positioning. All Koyo encoders feature a reinforced aluminum diecast casing and come equipped with a two-meter cable or MS connector.

Use the incremental encoders with our PLC high-speed counter modules for accurate position monitoring and control. Absolute encoders are wired to standard PLC DC input cards and do not require a high-speed input module. Mounting brackets and flexible couplings in aluminum and glass reinforced resin are also available.

Availability
All of our Koyo encoders are in stock and available to be shipped immediately.

Price
As with all of our product lines, our prices are often well below the list prices of traditional automation suppliers. Our direct business model allows us to operate more efficiently than other suppliers and pass the savings on to you. A light-duty encoder is a cost-effective encoder for light shaft loads.

Quality
All encoders carry a 1-year warranty, and have a 30-day money-back guarantee. If for any reason you are not satisfied with your purchase, send it back and we will refund your money.

Optical rotary encoders start at $89.00 (TRDA-2E100BD)

Encoder Selection Guide

Frequently Asked Questions

Industrial Grade Optical Rotary Encoders

Encoder Selection Chart
(click to enlarge)

Encoder White Paper
Fundamentals of Industrial Encoder Sensing Technologies,
Motion Detection Theory and Methods, Signal Output Styles

Encoders by Koyo from AutomationDirect

Light Duty Incremental Encoders	Light Duty Incremental Encoders A light-duty encoder is a cost-effective encoder for applications not requiring much of a load on the shaft. These encoders are perfect for industrial applications with good mounting conditions and flexible shaft couplings. TRD-MX Series - 4mm Solid Shaft *... New!* TRD-S Series - 6mm Solid Shaft TRD-SH Series - 8mm Hollow Shaft TRDA-2E Series - 1/4 inch Solid Shaft (SAE-dimension) *... New!* Small body with 38mm (1.5 inch) diameter and 30mm depth Dust proof (IP40 or IP50) rating Resolution available from 100 pulses per revolution to 2500 pulses per revolution Open collector or line driver output 200 kHz maximum response frequency Two-meter cable with tinned ends Light duty incremental encoders start at *$89.00* Light Duty Incremental Encoders Overview

Medium Duty Incremental Encoders	Medium Duty Incremental Encoders A medium-duty encoder is the most popular encoder we offer. The product line offers the greatest flexibility of choice while maintaining very high quality, all for a very low price. Incremental resolution available from 3 pulses per revolution to 2500 pulses per revolution *New! ...* "Hi PPR" resolutions now available up to 5000 pulses per revolution (TRD-N and TRD-NH Series) TRD-N Series - 8mm Solid Shaft (now up to 5000 ppr) TRD-NH Series - 8mm Hollow Shaft (now up to 5000 ppr) TRDA-20 Series - SAE-Dimension 0.375 in. Solid Shaft *... New!* TRDA-25 Series - SAE-Dimension 0.375 in. Solid Shaft with MS Connector *... New!* Size 20 (2.0 inch or 50mm diameter body) Size 25 (2.5 inch flange with 2.0 inch diameter body) Dust Proof (IP50) or Splash Proof (IP65) ratings 8mm or 3/8-in solid shaft, 8mm hollow shaft Up to 200 kHz response frequency Line driver or Totem-pole output Two-meter cable with tinned ends or MS connector Medium duty incremental encoders start at *$109.00* Medium Duty Incremental Encoders Overview

Heavy Duty Incremental Encoders	Heavy Duty Incremental Encoders A heavy-duty encoder is the most rugged encoder you can buy. Top-of-the-line bearings help maintain a service life of 12 billion revolutions and allow significant loads on the shaft. TRD-GK Series - 10mm Solid Shaft Rugged size 30 (3.0 inch or 78mm) diameter body Splash-proof (IP65) rating 10 mm standard shaft Incremental operation from 30 pulses/revolution to 5000pulses/revolution Up to 100 kHz response frequency Totem-pole output Two-meter cable with tinned ends Heavy duty incremental encoders start at *$237.00* Heavy Duty Incremental Encoders Overview

Medium Duty Absolute Encoders	Medium Duty Absolute Encoders An absolute encoder uses gray code (a version of binary where the physical inputs only change state one bit at a time) to describe each position, so position data is not lost when power is cycled. TRD-NA Series - 8mm Solid Shaft Small body with 50mm diameter and 35mm depth Splash-proof (IP65) rating 8mm stainless steel standard shaft Models range from 5 bit to 10 bit Gray code outputs Up to 20 kHz response frequency Two-meter cable with tinned ends Medium duty absolute encoders start at *$271.00* Medium Duty Absolute Encoders Overview

Encoder Accessories	Encoder Accessories Simplify your installation with ready-to-use couplings, mounting brackets / flanges, and wiring cables / connectors. Couplings provide a connection between encoders and solid shafts. We offer fiberglass and aluminum couplings for metric, S.A.E. and metric-to-S.A.E. applications. Couplings are available for all solid shaft encoders. Cables and connectors are available for TRDA-25 series encoders with MS connectors Encoder Couplings Encoder Mounting Brackets and Flanges Servo mount clamp for TRD-MX series encoders *... New!* Encoder Cables and Connectors Encoder accessories start at *$7.00* Encoder Accessories Overview

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