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

RZ1337A — 25-Bit High-Precision Absolute Encoder, 12,000 rpm with RS485

High-precision, high-speed multi-turn absolute encoder with 25-bit single-turn resolution and battery-backed 16-bit multi-turn counter. Features RS485 2.5MHz serial communication, 12,000 rpm maximum operating speed, and ∅10 conical shaft with 1:10 taper. Positioning accuracy <±30 arc-seconds. Designed for demanding servo motor feedback applications requiring both high speed and precision.

[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] RZ1337A Absolute Encoder Features & Specifications

•

Resolution: 25-bit (33,554,432 steps/rev)

•

Max Speed: 12,000 rpm (high-speed)

•

Positioning Accuracy: < ±30 arc-seconds

•

Interface: RS485, 2.5MHz baud rate

•

Multi-Turn: 16-bit counter (65,536 turns)

•

Shaft: ∅10 conical, taper 1:10

•

Supply: Single 5V DC ±10%

•

Temperature: -20 °C to +110 °C

•

Angular Acceleration: ≤100,000 rad/s² (powered)

RZ1337A Technical Specifications — 25-Bit RS485 12,000 rpm Multi-Turn Absolute

Parameter	Specification
Single-Turn Resolution	33,554,432 (25-bit)
Multi-Turn Counter	16-bit (65,536 turns, battery-backed retention)
Absolute Positioning Accuracy	< ±30 arc-seconds (depends on motor & assembly fit)
Repeatability Accuracy	< ±30 arc-seconds (depends on motor & assembly fit)
Interface Protocol	RS485
Baud Rate	2.5 MHz \| Communication frequency ≤ 16K\| Communication frequency ≤ 16K
Shaft Diameter	∅10 conical shaft, taper 1:10
Allowable Shaft Deviation	Axial: ±0.5mm / Radial: ±0.02mm / Dip Angle: 0.1° / Endplay: <0.1mm / Runout: <0.01mm
Max Operating Speed	12,000 rpm
Moment of Inertia	2.6 × 10⁻⁶ kg·mm²
Rotor Angular Acceleration	Powered: ≤100,000 rad/s² / Battery: ≤4,000 rad/s²
Current Consumption	< 100 mA
Battery Voltage	3.6V DC (Warning: 3.1V / Fault: 2.7V)
Supply Voltage	Single 5V DC ±10%
Operating Temperature	-20 °C to +110 °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
Rise/Fall Time	Around 100ns
Insulation Resistance	50 MΩ

Cable Definitions — 7-Pin Connector

Insert Seat	PIN2	PIN4	PIN11	PIN13	PIN6	PIN8	PIN1
Signal	5V	GND	485+	485-	Battery +	Battery GND	Shield
Cable Color	Red	Black	Blue	Yellow	Brown	White	Shielded Mesh

Ordering Information / Part Number

Serial Number

Absolute

Structural Form

With Bearing

1337

Appearance Char.

Model ID

Equipment ID

ID number

Resolution

25-bit

Turn Mode

P / M / S

Interface

T / S / B

Profile Ring

d65

Voltage

G0.35m

Cable

G + length

Example Part Number

RZ1337A 25 M T P 5V G0.35m

Resolution (Bits)

25 — 25bit (33,554,432 steps)

Turn Mode

M — Multi-Turn (16bit)

P — Pseudo Multi-Turn (16bit)

S — Single-Turn

Interface (Protocol)

T — 485 interface*

S — SSI interface*

B — BISS interface*

* Protocols marked with asterisk can be customized. Contact EPOCH sales for custom ordering configurations.

RZ1337A Mechanical Dimension

∅10 conical shaft with 1:10 taper. Refer to the official RZ1337A mechanical dimension drawing for full specifications including outer diameter, housing depth, and mounting hole layout. [RZ1337A Mechanical Dimension Drawing — refer to product manual]

RZ1337A Mechanical Dimension Drawing

Cross-Referencing & Retrofit Guide

The EPOCH RZ1337A is a high-precision 25-bit multi-turn absolute encoder with 12,000 rpm maximum speed, RS485 2.5MHz communication, and ∅10 conical 1:10 taper shaft. Designed for demanding servo motor feedback applications requiring a combination of high resolution, high speed, and wide temperature range (-20°C to +110°C). Engineers should verify shaft dimensions, mounting pattern, and protocol requirements before specifying.

⚠️ Trademark & Safety Notice:

EPOCH is an independent encoder manufacturer. Verify all mechanical and electrical parameters before integration.

Technical FAQs — RZ1337A Absolute Encoder

Q: What is the maximum speed of the RZ1337A?

The RZ1337A supports up to 12,000 rpm, double that of standard absolute encoders, making it suitable for high-speed servo motor applications.

Q: What is the positioning accuracy of the RZ1337A?

The RZ1337A achieves < ±30 arc-seconds absolute positioning accuracy with 25-bit resolution, providing high-precision feedback for demanding motion control systems.

Q: What is the temperature range of the RZ1337A?

The RZ1337A operates from -20°C to +110°C, offering an extended temperature range compared to standard absolute encoders. Battery fault threshold is 2.7V.

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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.