Contact Us

CN

English English French French Spanish Spanish Korean Korean German German Japanese Japanese
Home / Products / Encoder Products / Servo Motor Encoders / Optical Encoder Modules

RT28 Reflective Optical Encoder Module for DC Motor Servo Motor Feedback

  • RT28 Reflective Optical Encoder Module for DC Motor Servo Motor Feedback
  • RT28 Reflective Optical Encoder Module for DC Motor Servo Motor Feedback
  • RT28 Reflective Optical Encoder Module for DC Motor Servo Motor Feedback
  • RT28 Reflective Optical Encoder Module for DC Motor Servo Motor Feedback
  • RT28 Reflective Optical Encoder Module for DC Motor Servo Motor Feedback
  • RT28 Reflective Optical Encoder Module for DC Motor Servo Motor Feedback

Datasheet

Footprint

RoHS

Catalogue

Request Your Quote Today

For your personalized quote, kindly fill out the form below. If you need immediate assistance, feel free to reach out to us: liya@epoch-electronic.com.

Technical Data Ordering Information All Moudles

DC-DC Power Modules

Customized DC-DC Converters Explore DC-DC Converters

Encoder Products

Explore Rotary Encoder

Sensor Products

Frequency Control Products

Related Products

RT28 Reflective Optical Encoder Module — 28mm, 2-Channel 100~1000 CPR, for DC & Servo Motor | EPOCH| EPOCH
[RT28 SERIES] standard 28mm reflective optical encoder module

RT28 Reflective Optical Encoder Module — 28mm, 2-Channel 100~1000 CPR, for DC Motor & Servo Motor Feedback

The EPOCH RT28 Series is a standard 28mm reflective optical encoder module with PCBA and integrated housing design, with code disc. Outputs two channels of differential signals ranging from 100~1000 CPR. Suitable for small size DC motor, stepping motor, and servo motor.

Quick Select:   Features  Mechanical Drawings  Tech Specs  Waveform  Pin Definition  Ordering Guide  FAQ

[FEATURES] RT28 Series Reflective Optical Encoder Module Features

•
Type: Standard 28mm reflective optical encoder module with integrated housing
•
Resolution: 100 ~ 1,000 CPR (10 standard options)
•
Output: 2-Channel (A, B) — Voltage & Differential types
•
Supply: 3.3V ~ 5V DC
•
Max Speed: 8,000 RPM
•
Temp Range: -40°C to +85°C
•
Design: PCBA integrated housing with code disc
•
Connector: 6-pin SHR-09V-S plug
•
Shaft Diameters: 2mm ~ 8mm (metric) / 1/8in ~ 1/4in (imperial)

Mechanical Dimension Drawings

RT28 Mechanical Dimension Drawing

RT28 Reflective Optical Encoder Module Mechanical Dimension Drawing

Ø28.9 mm overall diameter, 18.2 mm height. 2-Ø3.2 mounting holes. Unit: mm.

Dimensions Of Motor End Face and outgoing shaft length

RT28 Reflective Optical Encoder Module Motor End Dimension Drawing

[USES] Uses:

This product is suitable for small size DC motor, stepping motor and servo motor. Part of EPOCH's Optical Encoder Modules series designed for compact motor feedback applications.

Waveform Diagram — RT28 Series Output Timing

RT28 Optical Encoder Module Waveform Diagram - 2-Channel Quadrature Output

Two-channel quadrature output (A and B) with 90° electrical phase shift. Channel A leads Channel B for clockwise rotation (viewed from shaft end). Differential outputs A/, B/ are the inverted complements of A and B respectively.

Pin Definition — RT28 Series (6-Pin, SHR-09V-S Plug)

Line Number123456
Differential DefinitionVccGndAA/BB/
Voltage Type DefinitionVccGndANCBNC

Line number

Ordering Information / Part Number — RT28 Series

Code Structure: RT28 [CPR Code] [Shaft Dia. Code] [Year Code]

R
Series Prefix
→
T
Series Prefix
→
2
Series Prefix
→
8
Series Prefix
→
CPR Code
e.g. A=500, B=1000
→
Shaft Dia. Code
e.g. 01=2mm, 06=1/4in
→
Year Code
2-digit year
CPR CodeABCEFGHIKP
CPR5001,000100200256360400512300600
Shaft Code01021114121303040506
Diameter2mm3mm4mm5mm6mm8mm1/8in5/32in3/16in1/4in

Model Print

Model Print

[CROSS-REFERENCE] Related Products

Also available: RR28 Series Miniature 3-Channel Reflective Rotary Encoder — up to 16,000 CPR with Index (Z) signal for high-precision feedback applications.

Technical FAQs — RT28 Series Reflective Optical Encoder Module

Q: What is the resolution range of the RT28 series?

A: The RT28 series offers resolutions from 100 CPR to 1,000 CPR. Available CPR codes include: 100 (C), 200 (E), 256 (F), 300 (K), 360 (G), 400 (H), 500 (A), 512 (I), 600 (P), and 1,000 (B).

Q: What output types are available for the RT28 encoder?

A: The RT28 supports two output modes: Voltage type (A, B) and Differential type (A, A/, B, B/). Differential outputs provide stronger noise immunity for longer cable runs and industrial environments.

Q: What is the difference between Voltage and Differential output types?

A: Voltage type outputs single-ended signals (A, B) and leaves pins 4 and 6 unconnected (NC). Differential type outputs complementary signals (A, A/, B, B/) for reliable signal integrity. Both types use the same 6-pin connector with different pin assignments.

Q: What supply voltage does the RT28 require?

A: The RT28 operates on a 3.3V to 5V DC supply range, making it compatible with both 3.3V and 5V logic systems commonly used in motor control applications.

Q: How do I select the correct shaft diameter code for ordering?

A: Measure your motor shaft diameter and match it to the available codes: 01=2mm, 02=3mm, 03=1/8in, 04=5/32in, 05=3/16in, 06=1/4in, 11=4mm, 12=6mm, 13=8mm, 14=5mm. Contact EPOCH if your shaft size is not listed.

B2B Global RT28 Encoder Sourcing

Request a Quote

Need custom resolution, shaft diameter, or bulk pricing? Contact our sales team.

Sales: liya@epoch-electronic.com
Legal Disclaimer: All manufacturer names and trademarks referenced are for cross-compatibility reference only. EPOCH is an independent manufacturer with no affiliation to OEM brands.

Ordering Information

Ordering Information / Part Number


Product Model


Packaging Information




ItemDescription

QTY/Box

Boxes

/Carton

G.WN.W

QTY

/Carton

Package Size
RT28RT28 Series Reflective Rotary Encoder10pcs10boxes/kgs/kgs100pcs310*130*45mm


Discover all the technical specifications by downloading the datasheet today.




All Rotary Encoder

Part Number Interface Dimensions
(mm) 		Resolution Ranges Resolution Counter Communication
Frequency 		Working Temperature Communication
Frequency 		Operation Speeds Protection
Structure 		Footprint 3D Datasheet Sample
RZ35A08 RS485 Φ35mm 17~23 Bits Single/Multi-Turn Differential output -20°C-+105°C 16K 6000rpm IP40
RZ Series RS485 Φ48mm 17~23 Bits Single/Multi-Turn Differential output -20°C-+105°C 16K 6000rpm IP40
UZ Series RS485 Φ48mm 1000-5000CPR Single/Multi-Turn Differential output -20°C-+105°C 500khz / IP40
RS972 / / / / / -40°C to +85°C / / /
RS970 / / / / / -40°C to +85°C / / /
RK Series / / / / / -20°C to +85°C / / /
RK Series / / / / / -20°C to +85°C / / /
RK Series / / / / / -20°C to +85°C / / /
RF28 / / / Single/Multi-Turn / -40 °C ~+85 °C / / /
RT28 / / / Single/Multi-Turn / -40 °C ~+85 °C / / /
RF20 / / / Single/Multi-Turn / -40 °C ~+85 °C / / /
RR28 / / / Single/Multi-Turn / -40 °C ~+85 °C / / /
RS5 / / / Single/Multi-Turn / / / / /
RSG35 RS485 / 17-23 Bits Single/Multi-Turn ≤16K -20 ℃ ~+105 ℃ 16K 6000rpm IP40
RSU3506 RS485 / 17-24 Bits Single/Multi-Turn ≤16K -20 ℃ ~+105 ℃ 16K 6000rpm IP40
MS Series / / 17 Bits Single/Multi-Turn ≤16K -10℃～105℃ 16K ≤6000rpm /
RZ1337A RS485 / 25 Bits Single/Multi-Turn ≤16K -20°C-+105°C 16K 12000rpm IP40
RZ7810 RS485 / 23~25 Bits Single/Multi-Turn ≤16K -20°C-+105°C 16K 6000rpm IP40
RS Series RS485 / 17~23 Bits Single/Multi-Turn ≤16K -20°C-+105°C 16K 6000rpm IP40

Application

Recommended News

We are committed to delivering high-quality, innovative electronic components that empower industries to achieve greater efficiency.

Copyright © 2024 Epoch Electronic Technology Co., LTD. All Rights Reserved.