GYS500D5-RB2 Fuji Electric ALPHA5 Smart Servo Motor 50W 3000RPM

The GYS500D5-RB2 is a compact 50 W ultra-low inertia AC servo motor from the Fuji Electric ALPHA5 Smart GYS Series.

Unlike conventional small servo motors designed mainly for general positioning, this model focuses on rapid response, lightweight motion and frequent acceleration/deceleration cycles.

The low inertia rotor enables fast start-stop operation, while the 20-bit incremental encoder provides high-resolution feedback for accurate servo control.

With a rated speed of 3000 r/min and maximum speed of 6000 r/min, the GYS500D5-RB2 is designed for compact automation mechanisms requiring precise and responsive motion performance.

This RB2 configuration is a non-brake version suitable for horizontal motion applications.

Key Features

• 50 W compact servo motor
• Ultra-low inertia rotor design
• 20-bit incremental encoder
• 3000 r/min rated speed
• 6000 r/min maximum speed
• High acceleration response
• Non-brake configuration
• Compatible with ALPHA5 Smart servo systems

Typical Applications

• Compact pick-and-place units
• Small indexing mechanisms
• Inspection equipment
• Precision feeding systems
• Lightweight automation axes

Ultra-Low Inertia Advantage

The main advantage of the GYS500D5-RB2 is dynamic response rather than continuous power output.

The ultra-low inertia structure helps achieve:

• Faster acceleration
• Faster deceleration
• Reduced positioning time
• Stable repeated motion
• Improved small-axis performance

It is ideal for machines where cycle time and positioning response are more important than high torque output.

20-Bit Incremental Encoder Feedback

The motor integrates a 20-bit incremental encoder.

Compared with standard lower-resolution feedback systems, it provides:

• Higher feedback resolution
• Improved positioning accuracy
• Better servo tuning capability
• Smoother low-speed operation

The encoder type must match the compatible servo amplifier and controller configuration.

High-Speed Motion Capability

Rated Speed

3000 r/min

Maximum Speed

6000 r/min

The high-speed capability supports applications requiring rapid movement between short positioning points.

Non-Brake Configuration

GYS500D5-RB2 does not include a holding brake.

Recommended for:

• Horizontal axes
• Lightweight mechanisms
• Machines with external holding solutions

For vertical axes or gravity-loaded applications, a brake-equipped model should be selected.

GYS500D5-RB2 vs GYS500D5-RB2-B

GYS500D5-RB2

50 W

20-bit incremental encoder

No holding brake

Lightweight horizontal motion

GYS500D5-RB2-B

50 W

20-bit incremental encoder

Integrated holding brake

Suitable for vertical load holding

The brake version has different mechanical dimensions and application requirements.

GYS500D5-RB2 vs GYS101D5-RB2

GYS500D5-RB2

50 W

Lower torque

Smaller and lighter motion axes

GYS101D5-RB2

100 W

Higher torque capacity

For larger mechanical loads

The selection depends on load inertia, acceleration demand and required torque.

GYS500D5-RB2 vs Standard Servo Motors

GYS500D5-RB2

Ultra-low inertia

High response

High-speed small-axis control

General Servo Motors

Higher inertia

Designed for broader applications

May not provide the same acceleration performance

The GYS500D5-RB2 is optimized for fast repetitive motion.

Installation Notes

Before installation:

• Confirm ALPHA5 Smart amplifier compatibility
• Verify encoder cable specification
• Check motor shaft and coupling type
• Confirm brake requirement
• Match load inertia
• Complete servo tuning
• Test direction and positioning at low speed

FAQ

Q1: What is the rated output of GYS500D5-RB2?

A1: The rated output is 50 W.

Q2: What is the rated speed?

A2: The rated speed is 3000 r/min, with a maximum speed of 6000 r/min.

Q3: What encoder does it use?

A3: It uses a 20-bit incremental encoder.

Q4: Does this model include a brake?

A4: No. GYS500D5-RB2 is the non-brake version.

Q5: What makes this motor different from standard 50W servo motors?

A5: Its ultra-low inertia rotor design provides faster response and shorter positioning cycles.

Q6: Which servo amplifier is compatible?

A6: It is designed for compatible Fuji Electric ALPHA5 Smart servo amplifier systems.

Q7: Is it suitable for vertical applications?

A7: Applications requiring load holding should use a brake-equipped version.

Q8: What type of machines use this motor?

A8: It is commonly used in compact automation systems requiring fast and precise positioning.