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RS9100 2-Channel Optical Encoder Module - 450 LPI, -40°C to +100°C | EPOCH| EPOCH

2-CHANNEL (A, B) HIGH-TEMP -40°C ~ +100°C UP TO 450 LPI LOW POWER 20mA TYP

RS9100 2-Channel Optical Incremental Encoder Module

The EPOCH RS9100 is a 2-channel (A, B) optical incremental encoder module featuring a lensed LED source and precision photodetector array. It delivers up to 450 LPI resolution across a -40°C to +100°C temperature range with a 200 kHz response frequency. With typical module operation current of just 25 mA, it is ideal for power-sensitive industrial encoding applications. The C-shaped package requires no external signal conditioning. EPOCH is a trusted supplier and distributor of high-quality optical encoder modules.

Quick Jump: Features · Specifications · Pin Definition · Part Number Guide · Drawings · Waveform · Applications · FAQ

Key Features

Resolution

Up to 450 LPI

Linear encoding, 11mm optical radius

Temperature Range

-40°C ~ +100°C

Extended high-temp operation

Power Consumption

25 mA (Typ)

Low current operation

Response Frequency

200 kHz

High-speed counting capability

Output Type

TTL Compatible

Internal 2kΩ pull-up resistor

Structure

C-Shape

Easy mounting, no alignment needed

Technical Specifications

Absolute Maximum Ratings

Parameter	Symbol	Rating
Storage Temperature	Ts	-40°C ~ +100°C
Operating Temperature	TA	-40°C ~ +100°C
Supply Voltage	Vcc	-0.5V ~ 7V
Output Voltage	Vo	-0.5V ~ Vcc
Response Frequency	f	200 kHz
Output Current per Channel	Io	-1 ~ 5 mA

Recommended Operating Conditions

Parameter	Condition	Range
Working Temperature		-40°C ~ +100°C
Supply Voltage	Ripple <100mV	4.5V ~ 5.5V
Shaft Perpendicularity + Axial Play		-0.25mm ~ 0.25mm
Shaft Eccentricity + Radial Play		0.04mm

Electrical Characteristics

All parameters over recommended range and mounting tolerances. Typical at 25°C.

Parameter	Min.	Typ.	Max.	Unit
Module Operation Current	20	25	40	mA
Detector Operating Current (Icc)	8	—	15	mA
Low Level Output Voltage (VOL)		0.2	0.4	V
High Level Output Voltage (VOH)	2.4	4.5		V
A/B Rise Time (tr)		120		ns
A/B Fall Time (tf)		20		ns
A/B Duty Cycle (Dt)	40	50	60	%
A/B Phase Difference (θ)	60	90	120	°e
Count Frequency			200	kHz
Note: VOL/VOH with internal 2kΩ pull-up resistor. tr/tf measured with CL=8PF.

Pin Definitions

Pin Name	Description	Direction
Vcc	+5V Power Supply	Power Supply
CH A	A Channel Output	Output
CH B	B Channel Output	Output
GND	Ground	Power Supply
NC	No Connection	—

Part Number Configuration Guide

RS9100-□

Example: RS9100-F5 = RS9100, 450 LPI Resolution

(Two-channel encoder module with 11mm optical radius)

RS9100

Series / Base Model
2-Channel Incremental

[LPI Code]

45=45 · 09=90 · 12=120
15=150 · 18=180 · 25=254
30=300 · 36=360 · F5=450

[CPR Code]

C=100 · E=200 · F=256
G=360 · H=400 · A=500
B=1000 CPR

Package

Standard C-Shape
11mm Optical Radius (ROP)

LPI for linear encoding · CPR for rotary encoding · Both with 11mm optical radius

Mechanical Dimension Drawings

Fig.3 — RS9100 Mechanical Dimension

RS9100 Series Mechanical Dimension Drawing

Module Printing — RS9100 Series Revision A0

Output Waveform Diagram

Fig.1 — Output Waveform (in "arrow" direction)

Applications

The RS9100 is designed for use in Printers, Plotters, Servo Motors, and Factory Automation equipment requiring precise position feedback in high-temperature environments. Its low power consumption (25 mA typ) makes it particularly suitable for power-constrained embedded systems.

⚠ Important Safety Notice: This product is not recommended for use in life safety applications. It is designed for industrial automation use only.

Frequently Asked Questions

Q: What is the maximum LPI resolution available for the RS9100?

A: The RS9100 offers standard LPI options of 45, 90, 120, 150, 180, 254, 300, 360, and 450 LPI. The 450 LPI (code F5) provides the highest linear resolution for precision positioning applications.

Q: Does the RS9100 require external signal conditioning?

A: No. The RS9100 features a built-in photodetector array with integrated signal conditioning. The outputs are open-collector with an internal 2kΩ pull-up resistor to 5V, providing TTL-compatible signals that interface directly with standard controllers.

Q: What is the power consumption of the RS9100?

A: The RS9100 has a typical module operation current of 25 mA (max 40 mA), with a detector current (Icc) of only 8 mA typical. This makes it one of the most power-efficient high-temperature encoder modules on the market, ideal for battery-powered or thermally constrained applications.

Q: Can the RS9100 be used for rotary encoding applications?

A: Yes. While the RS9100 is specified in LPI (lines per inch) for linear encoding, it can perform rotary encoding when paired with a matched code wheel at the 11mm optical radius. For dedicated rotary encoding with an index/reference pulse, see the RS9140 3-Channel Encoder Module.

Q: Where to buy RS9100 optical encoder module and how to select the correct part number?

A: EPOCH is the trusted supplier and distributor of the RS9100 encoder module. Use the format RS9100-□ where □ is the LPI code. For example, RS9100-F5 specifies 450 LPI resolution, RS9100-30 specifies 300 LPI. The module works with matched code wheels or code strips at 11mm optical radius. Contact our sales team at liya@epoch-electronic.com for sourcing, volume pricing, and custom resolution requirements.

Related Product: For 3-channel applications requiring an index/reference pulse, see the RS9140 3-Channel Optical Encoder Module.

Need a 2-Channel Encoder Module for High-Temp Applications?

Contact our engineering team for custom LPI configurations, code wheel/strip matching, volume pricing, or technical support.

Request Quote: 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. Specifications subject to change without notice.