Product Specification – CACR-SR15BY1SG-Y72

1. General Information

• Manufacturer: Yaskawa Electric Corporation

• Part Number: CACR-SR15BY1SG-Y72

• Product Type: Digital AC Servo Drive (SERVOPACK)

• Series: CACR-SR (VS-800 Series, BY Sub-Series, G-Series)

• Rated Output Power: 1.5 kW (1500W)

• Voltage Class: 200 VAC Three-Phase

• Protection Class: IP20

• Mounting Style: Base/Rack Mount

• Product Status: Legacy / Discontinued (Common replacement for Yasnac CNC systems)

2. Product Overview

3. Model Number Decoding

• CACR: AC Servo SERVOPACK

• SR: Speed & Position Regulation type

• 15: Rated output power: 1.5 kW

• B: Voltage class: 200VAC

• Y: Control type: Digital control, Absolute encoder compatible

• 1: Design/Interface revision

• S: Form factor: Rack-mount / Card module type

• G: Series: G-Series (General-Purpose industrial application)

• -Y72: Custom specification code (Yasnac CNC-specific variant)

4. Technical Specifications

4.1 Electrical Ratings

• Main Circuit Input: 3-phase 200–230 VAC, ±15%, 50/60 Hz

• Control Circuit Input: Single-phase 200–230 VAC

• Rated Continuous Output Current: 10 Arms

• Peak Output Current: 30 Arms (3x rated, short-time overload)

• Control Method: IGBT PWM sine-wave modulation

4.2 Control Performance

• Primary Control Mode: Speed Control

• Secondary Control Mode: Torque Control

• Speed Regulation Range: 1:3000

• Speed Regulation Accuracy:

  • Load variation: ±0.01% (at rated speed)

  • Temperature variation: ±0.5%

• Command Input: Analog ±10 VDC (Speed/Torque reference)

4.3 Encoder Feedback

• Type: Absolute Encoder Interface

• Resolution: Compatible with standard 15-bit absolute encoders

• Signal Interface: High-speed differential line-driver

• Key Feature: Maintains absolute position data after power-off, eliminating the need for homing routines

4.4 Protection & Diagnostic Functions

• Overcurrent, Overvoltage, Undervoltage protection

• Electronic thermal overload protection

• Overtemperature protection

• Motor stall/locked-rotor detection

• Encoder signal fault detection

• Emergency stop input & safety interlock

• LED fault code display for quick diagnostics

• Fault traceback mode (stores up to 10 historical faults)

4.5 Environmental Conditions

• Operating Temperature: 0 °C ~ +45 °C

• Storage Temperature: -20 °C ~ +65 °C

• Relative Humidity: 5% ~ 85% RH, non-condensing

• Vibration Resistance: 0.5 g (10 Hz ~ 60 Hz)

• Cooling Method: Forced air cooling

• Maximum Operating Altitude: 1,000 m above sea level

4.6 Physical & Interface Characteristics

• Form Factor: Base-mounted / Rack card module

• Weight: Approx. 7.8 kg (17.2 lb)

• Connectors:

  • CN1: Control I/O (Signals, alarms, enable)

  • CN2: Motor power & Absolute encoder feedback

  • Power Terminals: R/S/T (Input), U/V/W (Output)

• Indicators: Power, Run, Fault status LEDs

5. Key Features

• Absolute Encoder Compatibility: Retains position without power, ideal for critical positioning tasks.

• High-Precision Speed Control: Ultra-stable low-speed operation and high bandwidth response.

• Yasnac CNC Optimized: -Y72 variant ensures seamless integration with specific Yasnac CNC systems.

• Robust G-Series Design: Industrial-grade construction for continuous, reliable operation.

• Comprehensive Protection: Full suite of safeguards to protect drive, motor, and machinery.

• Direct Replacement: Exact OEM specification for legacy system maintenance.

6. Typical Applications

• Yasnac CNC Machine Tools (Milling machines, Lathes, Machining Centers)

• Industrial Robotics & Precision Positioning Systems

• Material Handling & Automated Assembly Lines

• Packaging, Printing, and Textile Machinery

• Applications requiring absolute position feedback

• Legacy equipment repair, retrofitting, and spare part replacement

7. Compatibility & Replacement Notes

• Matched Motor: Yaskawa 1.5 kW 200V servomotors equipped with absolute encoders.

• System Compatibility: Exclusively designed for Yasnac CNC systems requiring the -Y72 variant.

• Interchangeability: Not interchangeable with standard BY-series (e.g., -E) or incremental encoder (BE-series) drives. Replacement requires an identical CACR-SR15BY1SG-Y72 unit.

• Configuration: Parameters are set via the host CNC controller or dedicated Yaskawa setup software.