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[BATTERY] absolute multi-turn tracker: instant feedback without homing

RZH4409A — 44mm High-Profile Absolute Encoder for Servo Motor Feedback

High-reliability, high-resolution multi-turn absolute encoder with 9mm conical shaft bore. Integrates precise physical boundaries with compliant high-speed 2.5MHz RS485 communication protocols.

RZH4409A absolute encoder

RS485 absolute encoder

[OVERVIEW] RZH4409A Product Introduction & Absolute Applications

Features a robust multi-turn absolute feedback design with an integrated battery-backed 16-bit multi-turn counter. Custom-tailored for compact size 40 and size 60 micro servo motors, it delivers precise absolute position tracking through standard high-speed RS485 serial communications at 2.5MHz baud rates.

[USES] Uses:

This product is mainly used for servo-driven control system. Provide feedback information and auxiliary signals required by accurate position and speed control units for the system.

[FEATURES] Features:

•

Working Temperature: -20 ℃ ~ +105 ℃

•

Current Consumption: < 100mA

•

Battery Voltage: 3.6V DC

•

Battery Warning Voltage: 3.1V

•

Battery Fault Voltage: 2.5V

•

Signal Output: Differential output

•

Power Supply: Single 5V Supply

•

Rise/Fall Time: Around 100ns

•

Insulation Resistance: 50MΩ

[CORE] CORE ABSOLUTE PLATFORM DEFINITIONS

CHASSIS ENVELOPE

dia. 44.0 mm

Radial Clearance Fits

AXIAL HOUSING DEPTH

21 mm

Thinned Profile

SERIAL INTERFACE

RS485 Serial

Baud Rate 2.5 MHz

[FEATURE] ENVIRONMENTAL STRETCH & RELIABILITY:

Power-Off Memory: Multi-turn absolute counts retained by external 3.6V backup battery lines, requiring zero mechanical homing.
Dual Channel Warning: Integrated alert registries warn of battery exhaustion (Low at 3.1V, fault at 2.5V).
Heavy-Duty IP40 Shielding: IP40 optical sealing helps protect glass grating scale from particulate ingress.

[COMMUNICATION] REAL-TIME SERIAL ATTRIBUTES:

Single-Turn Precision: True selectable 17-bit (131072 steps) or 23-bit (8388608 steps) high accuracy optical readings.
Multi-Turn Capacity: 16-bit tracker tracks up to 65,536 turns continuously.
Low Power Drain: High-efficiency receiver consumes less than 100mA under work.
Vibration Protection: Vibration rated to 98 m/s² (10G); Mechanical shock rated to 980 m/s² (100G), 11ms.
Nominal Voltage: Operates strictly on a +5V DC ± 5% power line.

[BLUEPRINT] RZH4409A Mechanical Integration & Shaft Clearances

Refer to the absolute physical layout of the EPOCH RZH4409A below. Confirm shaft bore dimensions to ensure a smooth, concentric absolute fitment:

[BLUEPRINT] [RZH4409A Outline Dimension Sheet — Drawing 1]

RZH4409A Mechanical Dimension Drawing

To ensure zero publishing conflicts, complex SVG CAD tags are gracefully omitted.
Sizing Specifications: Encoder OD dia. 44.0 mm | Axial Envelope Thickness 21 mm | Mating Connection: 9mm Conical Shaft. | Axial Envelope Thickness 21 mm | Mating Connection: 9mm Conical Shaft.

[PROPERTIES] RZH4409A Absolute Technical Specifications

Electrical & Physical Parameters	Technical Standards (Sourcing Alignment)
Single-turn Resolution Options	131,072 Single-turn steps (17-Bit) / 8,388,608 Single-turn steps (23-Bit)
Multi-turn Counter Capacity	16-Bit multi-turn counter (Tracks up to 65,536 turns continuously; retains during battery standby)
Absolute Positioning Accuracy	< ±50" (Angular Seconds) (Note: Specific accuracy depends on motor and mechanical assembly fit)
Repetition Positioning Accuracy	< ±3" (Angular Seconds) (Note: Specific accuracy depends on motor and mechanical assembly fit)
Interface Protocol	RS485
Baud Rate & Frequency	2.5 MHz serial transmission bandwidth ｜ Communication frequency ≤ 16K
Allowable Shaft Deviations	• Axial: ±0.5 mm • Radial: ±0.02 mm • Dip Angle (Tilt): ≤ 0.1° • Axial Endplay (Play): < 0.1 mm • Radial Runout (Eccentricity): < 0.01 mm
Maximum Operating Speeds	Up to 6000 rpm (Max continuous rotation speed)
Rotor Moment of Inertia	0.68 kg·mm² (0.68 x 10^-6 kg·m²)
Rotor Angular Acceleration	• During Power Supply: ≤ 80,000 rad/s² • When Battery Powered: ≤ 4,000 rad/s²
Power Backup & Battery Line	Built-in battery voltage fault warning system
Mechanical Shock limits	980 m/s² (100G) Impact Acceleration, 11ms duration. Impacted 3 times in each XYZ direction (totally 18 times)
Vibration Resistance tolerance	• 10 to 55Hz: Constant amplitude of 1.5mm • 55 to 2000Hz: Acceleration of 98 m/s² (10G) • Test duration: XYZ axes 2 hours each axis (totally 6 hours)
Working Temperature Range	-20 °C to +105 °C temperature limits (Standard operating ranges)
Relative Humidity tolerance	≤ 90% RH (At 40 °C/21 days, based on EN 60068-2-78 standards), strictly without condensation
Degree of Protection (IP Rating)	IP40 Class rated ingress barrier

[MOUNTING] RZ SERIES Mounting Accessories & Leaf Springs Brackets

EPOCH supplies rigid leaf springs options to adapt to diverse servo motor shell geometries:

[MOUNTING] [Mating Bracket Blueprint Omitted for Compatibility]

MP4409-002A-40 (C-type-mounting hole d40 Plate spring Mechanical dimension diagramplate sprin

MP4409-002A-40 (C-type-mounting hole d40 Plate spring Mechanical dimension diagramplate sprin)

MP4409-001A-55 (D-type-mounting hole d55) Plate spring Mechanical dimension diagramplate sprin

MP4409-001A-55 (D-type-mounting hole d55) Plate spring Mechanical dimension diagramplate sprin)

MP4409-003A-40 (CL-type-mounting hole d40) Plate spring Mechanical dimensioMP4409-003A-40 (CL-type-mounting hole d40) Plate spring Mechanical dimension diagramplate sprinn diagramplate sprin

MP4409-003A-40 (CL-type-mounting hole d40) Plate spring Mechanical dimension diagramplate sprin)

Standard leaf-spring mounting brackets options:
Type d31/d40 Plate Spring: Suits micro-servo mount configurations.
Type d55 Plate Spring: Standard fitment for large frame spindles.

Bracket Accessory Reference	Mounting PCD Pitch Limits	Main Mechanical Layout Attributes
MP4409-002A-40	Pitch d40 ｜ Low profile	Standard 2-point alignment spring for 44mm outer box absolute frames (RZH4409A).
MP4409-002A-40	Type C ｜ Pitch d40	Standard 2-point alignment spring for 44mm outer box absolute frames (RZH4409A).
MP4409-001A-55	Type D ｜ Pitch d55	High-tension 4-point bracket suited for standard 48mm absolute encoders (RZH4809A).

[DECODING] Decoded Ordering Codes & Wire Terminal Schemes

Refer to our 11-step decoded catalog guide below to specify absolute model serials corresponding to your shaft and resolution configurations:

R — ZH — 44 — 09 — A — 23 — M — T — C — 5V — G — G0.35m

Example: R‑ZH‑44‑09‑A‑23‑M‑T‑C‑5V‑G0.35m

1. Serial R — Absolute Encoder

2. Structural Form Z — With Bearing
ZH — With Bearing (High Version)
ZL — With Bearing (Low Version)

3. Outer Diameter 44 — 44mm
48 — 48mm

4. Diameter of Hole 06 — 6mm
08 — 8mm
09 — 9mm conical shaft Current model: 09 (9mm conical)

5. Equipment ID A — Identification A
B — Identification B

6. Bits 17 — 17bit
21 — 21bit
23 — 23bit

7. Single-turn / Multi-turn P — Pseudo Multi-Turn (16-bit)
M — Multi-Turn (16-bit)
S — Single-Turn

8. Interface / Protocol T — RS485 interface
S — SSI interface*
B — BiSS interface* * Customizable protocols

9. Leaf Spring C — Mounting hole (d40)
CL — Low version, mounting hole (d40)
D — Mounting hole d55

10. Voltage 5V — DC 5V Input

11. Cables / Plugs G — Cable
W — Plugs

[WIRING] Cable Definitions & absolute Multi-turn wire connections

Please strictly align wire schemas using the verified Pin-to-Color matching below to prevent polarity reversal or sensor data losses during high-duty servo runs:

[CABLE] Quick Reference: Pin Configuration & Cable Colors (RZ & Absolute Series)

Pin Number	1	2	3	4	5	6	7
Signal	5V	GND	485+	485-	Battery +	Battery GND	PE
Cable Color	Red	Black	Blue	Yellow	Brown	White	Shielded Mesh

Terminal Signal	Required Cable colors	Functional absolute Description
Vcc (+5V)	Red / 红	Power Supply Line (+5V DC ± 5%, current drain < 100mA)
GND (0V)	Black / 黑	Main Ground Reference Loop
SD+ (Data+)	Blue / 蓝	High-speed RS485 non-inverted differential data line (485+)
SD- (Data-)	Yellow / 黄	High-speed RS485 inverted differential data line (485-)
VB (Battery +)	Brown / 棕	External Multi-turn memory retention battery (+3.0V ~ +3.6VDC) (Battery +)
GND_BAT (Bat GND)	White / 白	Floating Battery ground reference line (Battery GND)
SHIELD (FG / PE)	Shielded Mesh / 屏蔽网	Intertwined outer metal shield for high-voltage active protective ground (PE)

[RETROFIT] Cross-Referencing & Sourcing Retrofit Guides

The EPOCH RZH4409A absolute encoder features a 44mm outer diameter with 9mm conical shaft alignment, sharing mechanical footprints with industry-standard absolute encoder form factors.

[DISCLAIMER] Trademark & Safety Notice:

All OEM corporate marks, trademarks, and specific part model definitions referenced across these indices are physical properties of their respective corporate registration holders.
EPOCH is a fully independent absolute encoder and feedback device manufacturer. We hold no licensing links or partnerships with any named trademark owners.
Engineers should verify shaft bore dimensions, RS485 communication protocols, single-turn resolution bits, battery voltage parameters, and lead-out wire configurations before cross-referencing on CNC or robotic axes.

[SEO CLASSIFICATION] Sourcing Queries & Interchange Cross Indexes

Primary Absolute Index Classification: RZH4409A ｜ RZH4409A absolute encoder ｜ 44mm absolute encoder

Verified Sourcing Modifiers & Classifiers: absolute multi-turn encoder ｜RS485 encoder ｜hollow shaft absolute encoder

OEM Part Serials Cross-Referenced: servo motor absolute encoder ｜17bit encoder ｜absolute encoder

[FAQ] Technical Absolute FAQs Sourcing Guide

Explore standard queries regarding the EPOCH RZH4409A absolute Multi-turn Encoder series to secure proper cross-references:

[Q:] How does the EPOCH RZH4409A function as a compatible cross-reference?

The EPOCH RZH4409A absolute encoder features a 44mm outer diameter with 9mm conical shaft alignment, delivering high-speed 2.5MHz RS485 serial data protocol for real-time absolute position tracking in servo-driven systems. Designed for compatibility with industry-standard absolute encoder mounting geometries.

[Q:] What battery voltage specification is required for the RZH4409A multi-turn memory retention?

The RZH4409A multi-turn memory is backed up by an external battery supply line. The backup range is standard 3.0V to 3.6V (typically 3.6V DC). The encoder features intelligent battery health indicators: it triggers a low battery warning at 3.1V and reports a position tracking fault if the backup drops below 2.5V.

[Q:] What serial communications interfaces are supported by the RZH4409A series?

Our RZH4409A absolute encoders standardly support high-speed RS485 serial communication with a 2.5MHz baud rate (Tamagawa protocol compatible). It can also be manufactured with alternative industry interfaces such as SSI or BiSS protocols to drive dynamic closed-loops on diverse CNC systems.

B2B Global Absolute RFQ Sourcing

Request an absolute quote shortly

Need custom absolute bits configurations (17-bit / 21-bit / 23-bit), specialized connector harnesses, or bulk contract evaluations? Send coordinates to our direct sales dispatch channels.

[RFQ] Request Direct Sourcing Evaluation Info

Sales Office: liya@epoch-electronic.com. Include desired resolution bits (17/23), shaft sleeve size, application speed and annual volumes.

Legal Disclaimer & Trademark Attribution: Tamagawa® and OIH are registered trademarks of Tamagawa Seiki Co., Ltd. (多摩川精工株式会社) or their respective manufacturers. All manufacturer names, symbols, series, and descriptions used in this document are for nominal cross-compatibility indexation, cross-referencing, and market application identification purposes only. There is no implied affiliation, authorization, sponsorship, or factory endorsement between EPOCH and any original equipment manufacturers (OEM). All aftermarket products supplied by EPOCH are manufactured under independent specifications to serve as high-quality physical and electrical compatible alternatives.

Ordering Information

Ordering Information / Part Number

RZ Series absolute encoder ordering information

absolute encoder shaft

Packaging Information

Item

Description

QTY/Box

Boxes

/Carton

G.W

N.W

QTY

/Carton

Package Size

RZ44

Absolute Encoder,Outer Diameter 44mm

10pcs

10boxes

0.8kgs

0.7kgs

100pcs

340*180*47mm

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

RZ35D06S

RS485

Φ35mm

17~23 Bits

Single/Multi-Turn

Differential output

-20°C-+105°C

16K

6000rpm

IP40

RZL4408A

RS485

Φ44mm

17~23 Bits

Single/Multi-Turn

Differential output

-20°C-+105°C

16K

6000rpm

IP40

RZH4409A

RS485

Φ44mm

17~23 Bits

Single/Multi-Turn

Differential output

-20°C-+105°C

16K

6000rpm

IP40

RZL4409A

RS485

Φ44mm

17~23 Bits

Single/Multi-Turn

Differential output

-20°C-+105°C

16K

6000rpm

IP40

RZ4809A

RS485

Φ48mm

17~23 Bits

Single/Multi-Turn

Differential output

-20°C-+105°C

16K

6000rpm

IP40

UZ3509

RS485

Φ35mm

1000-5000CPR

Single/Multi-Turn

Differential output

-20°C-+105°C

500khz

IP40

UZ4408

RS485

Φ44mm

1000-5000CPR

Single/Multi-Turn

Differential output

-20°C-+105°C

500khz

IP40

UZ4409

RS485

Φ44mm

1000-5000CPR

Single/Multi-Turn

Differential output

-20°C-+105°C

500khz

IP40

UZ4809

RS485

Φ48mm

1000-5000CPR

Single/Multi-Turn

Differential output

-20°C-+105°C

500khz

IP40

-40°C to +85°C

-40°C to +85°C

-20°C to +85°C

-20°C to +85°C

-20°C to +85°C

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

RZ44 & RZ48

RS485

17-23 Bits

Single/Multi-Turn

≤16K

-20 ℃ ~+105 ℃

16K

6000rpm

IP40

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

Less Space,More Possibilities

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RZH4409A 44mm High Profile Absolute Encoder for Servo Motor Feedback

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Related Products

RZH4409A — 44mm High-Profile Absolute Encoder for Servo Motor Feedback

[OVERVIEW] RZH4409A Product Introduction & Absolute Applications

[USES] Uses:

[FEATURES] Features:

[FEATURE] ENVIRONMENTAL STRETCH & RELIABILITY:

[COMMUNICATION] REAL-TIME SERIAL ATTRIBUTES:

[BLUEPRINT] RZH4409A Mechanical Integration & Shaft Clearances

[PROPERTIES] RZH4409A Absolute Technical Specifications

[MOUNTING] RZ SERIES Mounting Accessories & Leaf Springs Brackets

[DECODING] Decoded Ordering Codes & Wire Terminal Schemes

[WIRING] Cable Definitions & absolute Multi-turn wire connections

[RETROFIT] Cross-Referencing & Sourcing Retrofit Guides

[FAQ] Technical Absolute FAQs Sourcing Guide

Request an absolute quote shortly

Ordering Information

Ordering Information / Part Number

Packaging Information

All Rotary Encoder

Application

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