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RK Optical Encoder Kit — Standard High-Performance 600 CPR 200 kHz 5V | EPOCH| EPOCH

[RK SERIES] standard 2-channel optical incremental encoder kit

RK Optical Encoder Kit — Standard High-Performance, 600 CPR, 200 kHz, 5V Supply

The EPOCH RK optical encoder kit is a high-performance, low-cost, two-channel optical incremental encoder module in a compact C-shaped plastic package. Designed for rotary and linear position sensing, it delivers up to 600 CPR when matched with a code disc, with a fast 200 kHz response frequency and single 5V supply. The standard encoder kit features TTL-compatible outputs with 2kΩ internal pull-up resistors, and supports both 650nm (red) and 850nm (infrared) light sources for flexible system integration.

Quick Select: Tech Specs Ordering Guide FAQ RK_L Variant

Mechanical Dimensions

Fig.6 — Straight Lead Dimensions Without Mounting Holes

[Upload: RK-Fig6-StraightLead-NoHoles.jpg]

Straight Lead Dimensions Without Mounting H

Mechanical drawing — straight lead package without mounting holes (all dimensions in mm)

Fig.7 — Straight Lead Dimensions With Mounting Holes

[Upload: RK-Fig7-StraightLead-WithHoles.jpg]

Straight Lead Dimensions With Mounting Holes

Mechanical drawing — straight lead package with mounting holes (all dimensions in mm)

Fig.8 — Bent Lead Dimension Without Mounting Holes

[Upload: RK-Fig8-BentLead-NoHoles.jpg]

Lead Dimension Without Mounting Holes

Mechanical drawing — bent lead package without mounting holes (all dimensions in mm)

Fig.9 — Bent Lead Dimension With Mounting Holes

[Upload: RK-Fig9-BentLead-WithHoles.jpg]

Bent Lead Dimension With Mounting Holes

Mechanical drawing — bent lead package with mounting holes (all dimensions in mm)

RK Standard Optical Incremental Encoder Kit — Description & Key Features

The EPOCH RK optical encoder kit is a high-performance, low-cost, two-channel optical incremental encoder module. It consists of a highly collimated light source and a detector IC enclosed in a small C-shaped plastic package. When matched with a code disc or codestrip, it provides precise rotary or linear position information. The RK series also supports linear (LPI) encoder configurations with multiple resolution options.

2-channel incremental encoder — Quadrature Aout and Bout outputs with TTL-compatible levels
Up to 600 CPR rotary resolution when paired with a code disc
Linear LPI options: 20, 45, 90, 150, 180, 300, 360 LPI for linear encoder applications
200 kHz response frequency for high-speed motion control feedback
Single 5V supply (4.5V ~ 5.5V) with low power consumption
2kΩ pull-up inside on A and B channel outputs (TTL compatible)
Selectable light source: 650nm (red) or 850nm (infrared)
Wide operating temperature: -20°C ~ +85°C
C-Shape structure — compact plastic package, easy to mount
Multiple mechanical options: straight or bent leads, with or without mounting holes

RK C-Shape Optical Encoder Kit — Typical Applications

Typical applications of the RK C-shape optical encoder kit include printers, plotters, copiers, office automation equipment, and industrial automation equipment. The standard encoder kit is also well-suited for servo motor position feedback and general motion control systems requiring reliable 2-channel quadrature output.

RK Standard Encoder Kit — Technical Specifications Table

Parameter	Specification
Technology	Optical incremental encoder module, C-shape plastic package
Output Signals	2-channel (Aout, Bout) — TTL compatible, 2kΩ pull-up inside
Resolution (Rotary)	Up to 600 CPR (matched with code disc)
Linear LPI Options	20, 45, 90, 150, 180, 300, 360 LPI
Supply Voltage	4.5V ~ 5.5V (single 5V)
Response Frequency	200 kHz
Operating Temperature	-20°C ~ +85°C
Storage Temperature	-40°C ~ +85°C
Light Source	650nm (red) or 850nm (infrared) selectable

Light Source Characteristic Curves

Fig.1 — 650nm Forward Voltage And Forward Current

[Upload: RK-Fig1-650nm-IV-Graph.jpg]

650nm Forward Voltage And Forward Current

I-V Graph — Forward Voltage (V) vs Forward Current (mA) for 650nm light source

Fig.2 — 650nm Forward Current And Relative Luminous Intensity

[Upload: RK-Fig2-650nm-LI-Graph.jpg]

650nm Forward Current And Relative Luminous Intensity

L-I Graph — Forward Current (mA) vs Relative Luminous Intensity for 650nm light source

Fig.3 — 850nm Forward Voltage And Forward Current

[Upload: RK-Fig3-850nm-IV-Graph.jpg]

850nm Forward Voltage And Forward Current

I-V Graph — Forward Voltage (V) vs Forward Current (mA) for 850nm light source

Fig.4 — 850nm Forward Current And Relative Luminous Intensity

[Upload: RK-Fig4-850nm-LI-Graph.jpg]

850nm Forward Current And Relative Luminous Intensity

L-I Graph — Forward Current (mA) vs Relative Luminous Intensity for 850nm light source

A/B Output Waveform Diagram

Fig.5 — A/B Output Waveform Diagram

[Upload: RK-Fig5-AB-Output-Waveform.jpg]

A/B Output Wave Form---Arrow direction

Quadrature Aout and Bout waveform timing diagram showing 90° electrical phase shift between channels

RK Optical Encoder Kit — Pin Definition

Pin Name	Function	Direction
An	Positive pole of light source (240Ω current limiting resistor recommended, VCC=5V)	Input
Ca	Negative pole of light source	Ground
Vcc	Power Supply +, 5V	Power
Aout	A Channel output, 2kΩ pull-up inside	Output
Bout	B Channel output, 2kΩ pull-up inside	Output
Gnd	Ground	Ground

Ordering Information / Part Number — RK Series

Code Structure: RK [LPI] [Lead Type] [Light Source] [Mounting Holes]

R

→

K

→

LPI Code

→

Lead Type

→

Light Src

→

Mtg Holes

Series Prefix

e.g. 02=20, 36=360 LPI

e.g. 0=Straight
1=Bent

e.g. 6=650nm
8=850nm

e.g. (omit)=no holes
1=with holes

LPI Code	02	45	09	15	18	30	36
LPI	20	45	90	150	180	300	360

Lead Code	0	1
Configuration	Straight lead	Bent lead

Light Code	6	8
Wavelength	650nm (red)	850nm (infrared)

Holes Code	(omit)	1
Mounting	Without holes	With holes

Example Ordering Code:

RK30-0-6

= RK Series · 30=300 LPI · 0=Straight lead · (omit)=No mounting holes · 6=650nm red light source

RK09-1-8-1

= RK Series · 09=90 LPI · 1=Bent lead · 1=With mounting holes · 8=850nm infrared light source

Module Printing — Product Marking Label

The module body is marked with a product label indicating the manufacturing year code and LPI resolution code, as shown below.

Module Printing — Year Code & LPI Marking

[Upload: RK-Module-Printing-Label.jpg]

Product label showing 24XX (year 2024) and RXX (LPI code, e.g. R36 = 360 LPI).
Example codes: 02=20LPI, 09=90LPI, 18=180LPI, 36=360LPI, 45=45LPI, 15=150LPI, 30=300LPI.

RK-Module-Printing-Label

Related Product — RK_L Wide-Voltage Optical Encoder Kit

For applications requiring a wider supply voltage range (2.7V ~ 5.5V) or additional LPI options (37, 75, 120, 254, 450 LPI), consider the RK_L Series Optical Encoder Kit. The RK_L variant features the same C-shape mechanical design and package with an 850nm infrared light source, but operates at a lower response frequency (60 kHz) and does not include internal 2kΩ pull-up resistors.

Technical FAQs — RK Optical Encoder Kit

Q: What type of output does the RK optical encoder kit provide?

A: The RK optical encoder kit provides TTL-compatible 2-channel quadrature outputs (Aout and Bout) with 2kΩ pull-up resistors integrated inside the module, simplifying external circuit design.

Q: What resolution options are available for the RK incremental encoder kit?

A: For rotary applications, the RK incremental encoder kit supports up to 600 CPR when matched with a code disc. For linear encoder configurations, LPI options include 20, 45, 90, 150, 180, 300, and 360 LPI.

Q: What applications is the RK C-shape optical encoder kit suitable for?

A: The RK C-shape optical encoder kit is suitable for printers, plotters, copiers, office automation equipment, industrial automation systems, and servo motor position feedback applications requiring reliable 2-channel incremental position sensing.

Need help selecting the right RK encoder kit?

Contact EPOCH for application-specific guidance and ordering assistance.

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Disclaimer: The information provided in this datasheet is for general reference only. EPOCH reserves the right to make product changes without prior notice. Customers should verify that the product is suitable for their intended application. Not recommended for safety-critical or life-support systems without explicit written approval from EPOCH.

Ordering Information

Ordering Information / Part Number

RK series is available in a variety of options, as shown in the table below.

Ordering Information

Module Printing

Packaging Information

Item	Description	QTY/Tray	Trays/Carton	G.W	N.W	QTY/Carton	Package Size
RK Series	RK Series Optical Encoder Modules	160 pcs	10 trays	1.96 kgs	0.8 kgs	1600 pcs	375314165 (mm)
RK Series	RK Series Optical Encoder Modules	160 pcs	40 trays	6.94 kgs	3.2 kgs	6400 PCS	560270320 (mm)

Material Weight Schedule

Material	Optical Encoder Module	Tray	Carton/Small	Carton/Big
Weight	0.5g/pc	74g/pc	420g/pc	780g/pc
QTY/Carton	1,600pcs / 6,400pcs	10trays / 40 trays	1pc	1pc
Weight/Carton	800g / 3,200g	740g / 2,960g	420g	780g
			1,960g/1600pcs	6,940g/6400pcs