FIRST
Turn type
Choose single-turn feedback or retained multi-turn feedback.
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SERVO & HIGH-PRECISION ENCODERS
Servo Motor Spindle Absolute Encoder
High-precision optical-grating absolute feedback for servo motors, CNC spindles and precision drive systems.
RZ · OD Ø35 · straight bore Ø6 · D31PRODUCT VIEW
MECHANICAL SIZE · BORE · DEPTH
RZ SERVO ABSOLUTE ENCODERBuild the feedback configuration.
FIXED INTERFACERS485 Modbus RTU
Technical data ↓THEN
Single-turn resolution
Choose the position resolution required by the servo drive.
PERFORMANCE
- Accuracy
- < ±50 arcsec
- Repeatability
- < ±3 arcsec
- Operating speed
- ≤ 6,000 rpm
- Supply
- 5 VDC · <100 mA
SELECTED CONFIGURATIONRZ · Ø35 / STRAIGHT BORE Ø6 / D31 · 17-BIT SINGLE-TURN · SINGLE-TURN · RS485 MODBUS RTUFinal mounting fit, runout, pinout and controlled drawing are confirmed during engineering review.
Request this configuration →ENGINEERING OVERVIEW
Position feedback, ready for integration.
FOSAI matches the selected housing, measurement range and signal requirements with the correct model code, controlled drawing and technical documentation.
ENGINEERING DATA
Engineering specification
Supplier-catalog values for preliminary engineering. Final pinout, connector and model suffix are confirmed before ordering.
Encoder technologyAbsolute optical-grating encoder
Single-turn resolution17 / 21 / 23 / 25 bit
Multi-turn resolution16 bit · 65,536 turns
Positioning accuracy< ±50 angular seconds · depends on motor and mechanical assembly fit
Repeat positioning accuracy< ±3 angular seconds · depends on motor and mechanical assembly fit
Mechanical sizesOD Ø35 straight bore Ø6 D31; OD Ø44 straight or taper bore Ø8 / Ø9 D40 / D55; OD Ø48 straight or taper bore Ø8 / Ø9 D40 / D55
InterfaceRS485 Modbus RTU
CommunicationCommunication frequency ≤16K · supplier-listed baud rate 2.5 MHz
Main power5 VDC · consumption <100 mA
Battery system3.6 VDC · 3.1 V warning · 2.5 V fault
Operating speed≤6,000 rpm
Shaft alignmentTilt ≤0.1° · axial endplay <0.1 mm · radial runout <0.01 mm
Operating temperature−20 to +105 °C
Protection ratingIP40
Mechanical shock980 m/s² for 11 ms · 3 impacts per direction
Vibration10–55 Hz at 1.5 mm; 55–2,000 Hz at 98 m/s²
Pin definition1: 5V; 2: GND; 3: 485+; 4: 485−; 5: battery power+; 6: battery GND; 7: NC; 8: PE / shield
Cable colorsRed: 5V; black: GND; blue: 485+; yellow: 485−; brown: battery+; white: battery GND; shield: PE
APPLICATION FIT
Where this product fits—and what still needs review.
Applications represented in this range
Compatibility is not established by the product name alone
- Complete model suffix and controller behavior
- Supply, signal, protocol, scaling and pinout
- Shaft or range, flange, connector and installation envelope
- Protection, certification and controlled drawing requirements
TYPICAL APPLICATIONS
Explore the application
See the measurement task, recommended configuration and installation checks for each working environment.
MODEL SELECTION SUPPORT
Send the application.
Receive the right configuration.
Include measurement range, resolution, interface, supply, shaft or mounting dimensions, protection rating and quantity.
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