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Customized DC-DC Converters Explore DC-DC ConvertersHigh-reliability, high-resolution multi-turn absolute encoders with battery-backed 16-bit multi-turn counter. Available in 44mm and 48mm outer diameters with 9mm conical or 8mm straight shaft options, including low-profile variant for tight-fit servo applications. All models feature RS485 serial communication at 2.5MHz baud rate with selectable 17-bit or 23-bit single-turn resolution. Designed as alternative solutions for applications using Tamagawa SA48 or Heidenhain form-factor encoders.
| Parameter | RZH4409A | RZH4809A | RZL4408A | RZL4409A |
|---|---|---|---|---|
| Outer Diameter | 44 mm | 48 mm | 44 mm | 44 mm |
| Shaft Bore | 9mm conical | 9mm conical | 8mm straight | 9mm conical |
| Version | High (ZH) | High (ZH) | Low (ZL) | Low (ZL) |
| Resolution | 17-bit / 23-bit selectable | |||
| Multi-Turn | 16-bit (65,536 turns) | |||
| Interface | RS485 2.5MHz | |||
| Supply Voltage | Single 5V DC | |||
| Ingress Protection | IP40 | |||
| Max Speed | 6,000 rpm | |||
| Details | ↓ View | ↓ View | ↓ View | ↓ View |
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.
| Parameter | Specification |
|---|---|
| Resolution | 131,072 (17-bit) / 8,388,608 (23-bit) |
| Multi-Turn Counter | 16-bit |
| Absolute Positioning Accuracy | < ±50 arc-seconds Note: Specific accuracy depends on motor and mechanical assembly fit |
| Repeatability Accuracy | < ±3 arc-seconds Note: Specific accuracy depends on motor and mechanical assembly fit |
| Interface Protocol | RS485 |
| Baud Rate | 2.5 MHz |
| Communication Frequency | ≤ 16K |
| Allowable Shaft Deviation | Axial: ±0.5mm / Radial: ±0.02mm / Dip Angle: 0.1° Axial Endplay: <0.1mm / Radial Runout: <0.01mm |
| Max Operating Speed | 6,000 rpm |
| Shaft Diameter | Axis of a cone ∅9 |
| Moment of Inertia | 0.68 kg·mm² |
| Rotor Angular Acceleration | Powered: ≤80,000 rad/s² / Battery: ≤4,000 rad/s² |
| Battery Voltage | 3.6V DC |
| Battery Fault Voltage | 2.5V |
| Battery Warning Voltage | 3.1V |
| Mechanical Shock | 980 m/s² (100G), 11ms, 3 times per XYZ direction (18 total) |
| Vibration | 10-55Hz 1.5mm / 55-2000Hz 98 m/s² / 2h per axis (6h total) |
| Operating Temperature | -20 °C to +105 °C |
| Relative Humidity | ≤90% (40°C/21d, EN 60068-2-78, non-condensing) |
| Ingress Protection | IP40 |
| Current Consumption | < 100mA |
| Rise/Fall Time | Around 100ns |
| Insulation Resistance | 50 MΩ |
EPOCH supplies rigid leaf spring options to adapt to diverse servo motor shell geometries. Note: Plate springs are selected according to the size of the motor end face.
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)
MP4409-003A-40 (CL-type-mounting hole d40) Plate spring Mechanical dimension diagramplate sprin)
| Bracket Reference | Mounting PCD | Application |
|---|---|---|
| MP4409-002A-40 | Pitch d40 | 2-point alignment spring for 44mm absolute encoder frames |
| MP4409-001A-55 | Type D | Pitch d55| Pitch d55 | High-tension 4-point bracket for 48mm absolute encoder frames |
9mm conical shaft · 17/23-bit · RS485 2.5MHz
Key Dimensions:
OD 44.0 mm |OD 48.0 mm | 9mm conical shaft bore| 9mm conical shaft bore
9mm conical shaft · 17/23-bit · RS485 2.5MHz
Key Dimensions:
OD 48.0 mm | 9mm conical shaft bore
8mm straight shaft · 17/23-bit · RS485 2.5MHz · low-profile for tight spaces
Key Dimensions:
OD 44.0 mm | 8mm straight shaft bore
RZL4408A Recommended motor end dimensions:
9mm conical shaft · 17/23-bit · RS485 2.5MHz
Key Dimensions:
OD 44.0 mm | 9mm conical shaft bore
The EPOCH RZ Series absolute encoders are designed as physical and electrical alternatives for a range of industry-standard absolute encoder applications. The RZH4809A (48mm OD) shares a similar form factor with the Tamagawa SA48 series. The 44mm models (RZH4409A, RZL4408A, RZL4409A) offer 17–23-bit single-turn resolution and 16-bit multi-turn capability in a compact 44mm OD housing. For applications originally using Heidenhain or SSI-based absolute encoders, please contact our team for protocol compatibility evaluation. Engineers should verify shaft bore dimensions (conical vs. straight), mounting bolt patterns, and communication protocol requirements before specifying. Contact our engineering team for detailed fitment comparisons.
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.
| Function | 5V | GND | 485+ | 485- | Battery + | Battery GND | Shield |
|---|---|---|---|---|---|---|---|
| Cable Color | Red | Black | Blue | Yellow | Brown | White | Bare / Mesh |
Refer to our 12-step decoded catalog guide below to specify absolute model serials corresponding to your shaft and resolution configurations:
Example: R‑ZH‑44‑09‑A‑23‑M‑T‑C‑5V‑G0.35m
Explore standard queries regarding the EPOCH RZ Series Absolute Multi-turn Encoder family to secure proper cross-references:
Q: Is the RZ Series a multi-turn absolute encoder?
Yes, all RZ Series models feature a battery-backed 16-bit multi-turn counter capable of tracking up to 65,536 absolute turns continuously, combined with selectable 17-bit or 23-bit single-turn resolution. This allows absolute position retention even after power loss, without requiring a homing routine on restart.
Q: What resolution options does the RZ Series offer — 17-bit or 23-bit?
The RZ Series supports both 17-bit (131,072 steps per revolution) and 23-bit (8,388,608 steps per revolution) single-turn resolution, selectable via the ordering code. Both options include 16-bit multi-turn tracking. Higher bit counts provide finer position resolution for precision servo control applications.
Q: Is the RZH4809A compatible with the Tamagawa SA48 series?
The RZH4809A shares a similar 48mm outer diameter form factor with the Tamagawa SA48 series. Similarities: 48mm OD, 17-23-bit resolution range, 16-bit multi-turn counter, 5V DC supply. Key differences to verify: RZH4809A uses a 9mm conical shaft (SA48 offers 6mm or 8mm straight shaft). Please verify shaft dimensions, mounting pitch, and communication protocol requirements before integration. Contact our engineers for application-specific fitment evaluation.
Need custom absolute bits configurations (17-bit / 21-bit / 23-bit), specialized connector harnesses, or bulk contract evaluations? Send your requirements to our direct sales dispatch channels.
| Item | Description | QTY/Box | Boxes /Carton | G.W | N.W | QTY /Carton | Package Size |
| RZ48 | Absolute Encoder,Outer Diameter 48mm | 10pcs | 10boxes | 0.9kgs | 0.8kgs | 100pcs | 340*180*47mm |
Discover all the technical specifications by downloading the datasheet today.
| 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 |  |
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| RZ Series | RS485 | Φ48mm | 17~23 Bits | Single/Multi-Turn | Differential output | -20°C-+105°C | 16K | 6000rpm | IP40 | |
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| UZ Series | RS485 | Φ48mm | 1000-5000CPR | Single/Multi-Turn | Differential output | -20°C-+105°C | 500khz | / | IP40 | |
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| RS972 | / | / | / | / | / | -40°C to +85°C | / | / | / | |
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| RS970 | / | / | / | / | / | -40°C to +85°C | / | / | / | |
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| RS9100 Series | / | / | / | / | / | -40°C to +85°C | / | / | / | |
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| RS971 | / | / | / | / | / | -40°C to +85°C | / | / | / | |
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| RK Series | / | / | / | / | / | -20°C to +85°C | / | / | / | |
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| RK Series | / | / | / | / | / | -20°C to +85°C | / | / | / | |
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| RF28 | / | / | / | Single/Multi-Turn | / | -40 °C ~+85 °C | / | / | / | |
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| RT28 | / | / | / | Single/Multi-Turn | / | -40 °C ~+85 °C | / | / | / | |
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| RF20 | / | / | / | Single/Multi-Turn | / | -40 °C ~+85 °C | / | / | / | |
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| RR28 | / | / | / | Single/Multi-Turn | / | -40 °C ~+85 °C | / | / | / | |
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| RS5 | / | / | / | Single/Multi-Turn | / | / | / | / | / | |
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| RSG35 | RS485 | / | 17-23 Bits | Single/Multi-Turn | ≤16K | -20 ℃ ~+105 ℃ | 16K | 6000rpm | IP40 | |
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| RSU3506 | RS485 | / | 17-24 Bits | Single/Multi-Turn | ≤16K | -20 ℃ ~+105 ℃ | 16K | 6000rpm | IP40 | |
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| MS Series | / | / | 17 Bits | Single/Multi-Turn | ≤16K | -10℃～105℃ | 16K | ≤6000rpm | / | |
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| RZ1337A | RS485 | / | 25 Bits | Single/Multi-Turn | ≤16K | -20°C-+105°C | 16K | 12000rpm | IP40 | |
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| RZ7810 | RS485 | / | 23~25 Bits | Single/Multi-Turn | ≤16K | -20°C-+105°C | 16K | 6000rpm | IP40 | |
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| RS Series | RS485 | / | 17~23 Bits | Single/Multi-Turn | ≤16K | -20°C-+105°C | 16K | 6000rpm | IP40 | |
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Essential for Precision and Reliability in Medical Equipment
Improve Automation and Efficiency in Various Robotic Applications
Improve the Efficiency and Reliability of Automation Systems
Accurate Feedback on Position and Speed
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