Integrated Magnetic Power Module
Buck (Step-Down)-Low Voltage
Buck (Step-Down)-Medium Voltage
Boost (Step-Up)
DC-DC Power Modules
Magnetically Integrated Power Module (SiP)
Buck (Step-Down)-Multiple Outputs
Buck (Step-Down)
Boost (Step-Up)
Customized DC-DC Converters
Tailored Power Modules: Precision Solutions for Your Unique Needs.
Contact Us Today to Discuss Your Project!
DC-DC Power Modules
Customized DC-DC Converters Explore DC-DC Converters
RK Series Optical Encoder Modules
Details
ED Analog Output Displacement Sensor
Details
RZ7810 High Resolution Absolute Encoder 23/25 Bit Multi Turn with RS485
Details
RZ1337A Series Bearing Absolute Encoder Servo Motor Position Feedback
Details
RSU3506 35mm Ultra Flat Bearingless Absolute Encoder
Details
RSG35 Series 35mm Bearingless Absolute Encoder 17-23 Bit
Details
RS5 Series Simple Installation Encoders for Stepper Motor
Details
RT28 Series Reflective Rotary Encoder for DC Motor
Details
RK Series Incremental Optical Encoder Modules
Details
M3225 MHz Crystal SMD
Details
XO3225 CMOS Crystal Oscillator SPXO
Details
TLV7050 LVPECL Crystal Oscillator
Details
TC5032 TCXO SMD VCTCXO Precision Oscillator
Details
TC2520 SMD VCTCXO Oscillator
Details
TOC2020 OCXO Crystal Oscillator
Details
TR8804 RTC Module
DetailsBearingless (split-type) modular absolute encoders with battery-backed 16-bit multi-turn counter. Available in 35mm and 43mm outer diameters with 6mm or 8mm shaft bore options, in high-profile (RSH) and low-profile (RSL) variants. All models feature 17/23-bit selectable single-turn resolution and RS485 2.5MHz serial communication for precision servo motor feedback integration.
| Parameter | RSH/RSL4308 | RSH/RSL4306 | RSH/RSL3506 |
|---|---|---|---|
| Outer Diameter | 43 mm | 43 mm | 35 mm |
| Shaft Bore | 8mm | 6mm | 6mm |
| Profile Options | High (RSH) / Low (RSL) | High (RSH) / Low (RSL) | High (RSH) / Low (RSL) |
| Design | Bearingless split-type, modular | ||
| Resolution | 17-bit / 23-bit selectable | ||
| Multi-Turn | 16-bit (65,536 turns) | ||
| Interface | RS485 2.5MHz | ||
| Max Speed | 6,000 rpm | ||
| Supply Voltage | Single 5V DC | ||
| Temperature | -20°C to +105°C | ||
| Details | ↓ 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.
Example Part Number
R S H 43 08 23 M T 5V
* Profile (H/L), OD (43/35), Bore (08/06), and Turn Mode (P/M) fields are order-configurable. Contact EPOCH sales for custom configurations.
| Parameter | Specification |
|---|---|
| Technology | Bearingless split-type, modular |
| Single-Turn Resolution | 131,072 (17-bit) / 8,388,608 (23-bit) |
| Multi-Turn Counter | 16-bit (65,536 turns, battery-backed retention) |
| Absolute Positioning Accuracy | < ±50 arc-seconds (depends on motor & assembly fit) |
| Repeatability Accuracy | < ±3 arc-seconds (depends on motor & assembly fit) |
| Interface Protocol | RS485 |
| Baud Rate | 2.5 MHz | Communication frequency ≤ 16K| Communication frequency ≤ 16K |
| Allowable Shaft Deviation | Dip Angle: 0.1° / Axial Endplay: <0.1mm / Radial Runout: <0.01mm |
| Max Operating Speed | 6,000 rpm |
| Moment of Inertia | 0.21 kg·mm² |
| Rotor Angular Acceleration | Powered: ≤80,000 rad/s² / Battery: ≤4,000 rad/s² |
| Current Consumption | < 100 mA |
| Battery Voltage | 3.6V DC (Warning: 3.1V / Fault: 2.5V) |
| Supply Voltage | Single 5V DC |
| Operating Temperature | -20 °C to +105 °C |
| Relative Humidity | ≤90% (40°C/21d, EN 60068-2-78, non-condensing) |
| Ingress Protection | IP40 |
| Mechanical Shock | 980 m/s² (100G), 11ms, 3 times per XYZ (18 total) |
| Vibration | 10-55Hz 1.5mm / 55-2000Hz 98 m/s² (XYZ, 2h/axis, 6h total) |
| Rise/Fall Time | Around 100ns |
| Insulation Resistance | 50 MΩ |
43mm OD · 8mm shaft bore · 17/23-bit · RS485 2.5MHz · High (RSH) & Low (RSL) profile options
43mm OD · 6mm shaft bore · 17/23-bit · RS485 2.5MHz · servo motor feedback
RSL35R06 Recommended motor end dimensions
35mm OD · 6mm shaft bore · 17/23-bit · RS485 2.5MHz · compact split-type design
RSH3506 Recommended motor end dimensions
The EPOCH RS Series bearingless absolute encoders are designed as modular split-type alternatives for a range of servo motor feedback applications. The 35mm models (RSH3506/RSL3506) share a similar compact form factor suitable for small motor integration, while the 43mm models (RSH4308/RSL4308, RSH4306/RSL4306) offer a larger footprint with 6mm or 8mm shaft bore options. High-profile (RSH) and low-profile (RSL) variants provide installation flexibility. Engineers should verify shaft bore dimensions, mounting configuration, and profile height requirements before specifying.
EPOCH is an independent encoder manufacturer. Verify all mechanical and electrical parameters before integration.
| Pin | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
|---|---|---|---|---|---|---|---|---|
| Signal | 5V | GND | 485+ | 485- | Battery + | Battery GND | NC | PE |
| Color | Red | Black | Blue | Yellow | Brown | White | — | Shielded Mesh |
Q: What is the difference between RSH (high profile) and RSL (low profile)?
RSH denotes the high-profile version and RSL denotes the low-profile version of the same bearingless absolute encoder model. Both share identical electrical specifications and shaft bore options; the difference is in the housing height for mechanical fitment flexibility.
Q: What are the available sizes in the RS Series?
Three size groups: RSH/RSL4308 (43mm OD, 8mm shaft), RSH/RSL4306 (43mm OD, 6mm shaft), and RSH/RSL3506 (35mm OD, 6mm shaft). Each available in high (RSH) or low (RSL) profile.
Q: What resolution does the RS Series support?
The RS Series supports selectable 17-bit (131,072 steps) or 23-bit (8,388,608 steps) single-turn resolution with a 16-bit multi-turn counter, communicated via RS485 at 2.5MHz.
Need custom resolution, specific profile height, or bulk pricing? Contact our sales team.
| Item | Description | QTY/Box | Boxes /Carton | G.W | N.W | QTY /Carton | Package Size |
| RS Series | RS Series Bearingless Absolute Encoder | 10pcs | 10boxes | 0.38kgs | 0.3kgs | 100pcs | 310*130*45mm |
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 |  |
 |
|
| 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 | |
|
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
English
French
Spanish
Korean
German
Japanese
