The GYS201D7-EC2 is a 200 W ALPHA7 GYS7 Series AC servo motor designed for compact motion axes requiring high-resolution absolute feedback, rapid acceleration and a positive keyed mechanical connection.
Its ultra-low inertia rotor supports frequent starts, stops and direction changes. The motor operates at a rated speed of 3000 r/min and reaches up to 6000 r/min for short-cycle feeding, indexing and precision positioning.
A 24-bit absolute encoder provides high-resolution position feedback and supports absolute-position operation when the compatible amplifier, battery and controller configuration are correctly established.
The EC2 configuration combines absolute feedback with a keyed shaft and tapped center hole. It does not include an electromagnetic holding brake.
Key Features
- 200 W rated output
- ALPHA7 GYS7 motor platform
- Ultra-low inertia construction
- 24-bit absolute encoder
- 3000 r/min rated speed
- 6000 r/min maximum speed
- Keyed and tapped shaft
- Non-brake configuration
Typical Applications
- Precision indexing axes
- Packaging machinery
- Electronic assembly equipment
- High-speed feeding systems
- Compact positioning mechanisms
24-Bit Absolute Encoder
The integrated 24-bit absolute encoder is the main difference of GYS201D7-EC2.
It provides high-resolution feedback for:
- Absolute position detection
- Precise positioning
- Speed regulation
- Repetitive indexing
- Servo-loop tuning
Absolute position retention depends on the amplifier, battery, parameters and controller configuration.
The motor should not be advertised as batteryless unless the complete system is specifically configured for batteryless absolute operation.
ALPHA7 Platform
GYS201D7-EC2 belongs to the ALPHA7 motor generation.
Compared with earlier D5 motors, the D7 platform provides:
- 24-bit encoder feedback
- Updated amplifier compatibility
- Higher control resolution
- Current-generation system support
- ALPHA7 and selected ALPHA7S compatibility
A D5 motor should not be replaced with a D7 motor without verifying the amplifier, cables, connectors and control parameters.
Ultra-Low Inertia Performance
The GYS7 rotor design is optimized for fast dynamic response.
It supports:
- Rapid acceleration
- Rapid deceleration
- Short positioning cycles
- Frequent forward and reverse motion
- Responsive control of lightweight loads
This motor is better suited to fast machine axes than applications dominated by very high load inertia.
Speed and Torque Performance
Rated Output
200 W
Rated Speed
3000 r/min
Maximum Speed
6000 r/min
Rated Torque
0.637 N·m
Maximum Torque
1.91 N·m
Maximum torque is intended for temporary acceleration and deceleration rather than continuous operation.
Keyed and Tapped Shaft
The EC2 version uses a straight shaft with:
- Mechanical key
- Tapped center hole
- Positive torque transmission
- Axial retention capability
This shaft configuration is suitable for:
- Keyed couplings
- Timing pulleys
- Compact gears
- Belt-driven axes
The shaft key, center thread and coupling dimensions must be checked before installation.
Non-Brake Configuration
GYS201D7-EC2 does not include a holding brake.
It is best suited to:
- Horizontal axes
- Rotary indexing mechanisms
- Non-suspended loads
- Systems with an external holding device
For vertical or gravity-loaded mechanisms, the brake-equipped GYS201D7-EC2-B should be evaluated.
IP67 Motor Structure
The motor uses an IP67 protective construction, excluding the shaft-through section and connector areas.
Installation should still protect:
- Shaft penetration
- Motor connectors
- Encoder connector
- Cable entry points
IP67 does not mean that every part of the installed motor can remain continuously immersed in liquid.
GYS201D7-EC2 vs GYS201D7-EC2-B
GYS201D7-EC2
200 W
24-bit absolute encoder
Keyed and tapped shaft
No holding brake
GYS201D7-EC2-B
200 W
24-bit absolute encoder
Keyed and tapped shaft
Integrated holding brake
The brake-equipped model is intended for stationary load retention.
GYS201D7-EC2 vs GYS201D7-NC2
GYS201D7-EC2
24-bit absolute encoder
Keyed and tapped shaft
No brake
GYS201D7-NC2
24-bit incremental encoder
Keyed and tapped shaft
No brake
The primary difference is absolute versus incremental feedback.
GYS201D7-EC2 vs GYS201D7-EB2
GYS201D7-EC2
24-bit absolute encoder
Keyed shaft with tapped center hole
GYS201D7-EB2
24-bit absolute encoder
Straight shaft without key
The main difference is the shaft-end construction.
GYS201D7-EC2 vs GYS201D5-RC2
GYS201D7-EC2
ALPHA7 generation
24-bit absolute encoder
Keyed and tapped shaft
Current D7 platform
GYS201D5-RC2
ALPHA5 Smart generation
20-bit incremental encoder
Keyed and tapped shaft
Earlier D5 platform
Although their output and shaft style are similar, their encoder systems, amplifiers and cables are different.
Amplifier Compatibility
GYS201D7-EC2 is intended for a compatible 0.2 kW ALPHA7 or supported ALPHA7S servo amplifier.
Before replacement, verify:
- Exact amplifier reference
- Control interface type
- Motor power cable
- Encoder cable
- Absolute-position battery arrangement
- Connector configuration
- Firmware and parameters
- Shaft and flange dimensions
Matching only the 200 W output is not sufficient.
Installation Notes
- Disconnect all servo-system power
- Confirm the EC2 keyed shaft configuration
- Install the correct shaft key
- Check the center-bolt thread
- Align the motor and load shafts
- Verify absolute encoder settings
- Confirm battery condition where applicable
- Restore servo parameters
- Test positioning at low speed
- Establish the machine origin safely
FAQ
Q1: What is the rated output of GYS201D7-EC2?
A1: Its rated output is 200 W or 0.2 kW.
Q2: What encoder does it use?
A2: It uses a 24-bit absolute encoder.
Q3: Does it include a holding brake?
A3: No. The brake-equipped version is GYS201D7-EC2-B.
Q4: What is the shaft configuration?
A4: It uses a keyed shaft with a tapped center hole.
Q5: What is the rated speed?
A5: The rated speed is 3000 r/min, and the maximum speed is 6000 r/min.
Q6: What distinguishes it from GYS201D7-NC2?
A6: EC2 uses a 24-bit absolute encoder, while NC2 uses a 24-bit incremental encoder.
Q7: What distinguishes it from GYS201D5-RC2?
A7: D7-EC2 belongs to the ALPHA7 platform and uses a 24-bit absolute encoder, while D5-RC2 uses a 20-bit incremental encoder.
Q8: Is it suitable for vertical axes?
A8: Vertical axes requiring stationary load holding should use the brake-equipped EC2-B version or another suitable holding system.
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