Product Specification – CACR-SR15SB1AF-Y79

1. General Information

• Manufacturer: Yaskawa Electric Corporation

• Part Number: CACR-SR15SB1AF-Y79 (alternate: CACRSR15SB1AFY79)

• Product Type: Digital AC Servo Drive (SERVOPACK)

• Series: CACR-SR (VS-800 / Yasnac Legacy Series)

• Rated Output Power: 1.5 kW

• Voltage Class: 200 VAC Three-Phase

• Protection Class: IP20

• Mounting Style: Rack / through-hole mounting (SB-type)

• Product Status: Discontinued; OEM-customized CNC-specific servo drive

2. Product Overview

3. Model Number Decoding

• CACR: AC Servo SERVOPACK

• SR: Speed & Position Regulation Series

• 15: Rated output power: 1.5 kW

• S: Rack/through-hole mounting structure

• B: 200 VAC voltage class

• 1: Control circuit/interface version

• A: Hardware configuration code

• F: Standard industrial firmware base

• -Y79: OEM/custom order code (factory-fixed parameters, CNC-specific tuning, exclusive I/O interlock)

4. Technical Specifications

4.1 Electrical Parameters

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

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

• Rated Continuous Output Current: 10 A

• Peak Output Current: 28–30 A (short-time overload capacity)

• Control Method: IGBT sine-wave PWM modulation

• Output Phase: 3-phase

4.2 Control Performance

• Control Modes: Position control, Speed control, Torque control

• Speed Regulation Range: 1:3000

• Speed Regulation Accuracy:

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

  • Temperature variation: ±0.5%

• Response Bandwidth: Up to 400 Hz

• Command Input Signals:

  • Speed/Torque command: Analog ±10 VDC

  • Position command: Differential A/B/Z pulse train

• Y79 Custom Feature: Fixed, non-adjustable OEM parameters and I/O logic for dedicated CNC equipment.

4.3 Encoder Feedback

• Type: Incremental optical encoder

• Signal: A/B/Z differential signals

• Resolution: Compatible with standard Yaskawa encoders (e.g., 6000 P/R)

• Compatibility: For use with Yaskawa 1.5 kW 200V AC servo motors

4.4 Protection & Environmental Conditions

• Protections: Overcurrent, overvoltage, undervoltage, electronic thermal overload, overtemperature, motor stall, encoder fault, emergency stop, external safety interlock

• 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: 1000 m above sea level

4.5 Interface & Indicators

• CN1: Control I/O connector (servo enable, alarms, analog command, I/O logic)

• CN2: Motor encoder feedback connector

• Power Terminals: R/S/T (3-phase input), U/V/W (motor output)

• Indicators: 7-segment LED for status and fault code display

5. Key Features

• 1.5 kW High-Precision Servo Control: Optimized for dynamic CNC axis performance.

• Y79 Locked Custom Firmware: Pre-configured parameters for dedicated OEM machinery.

• Multi-Mode Operation: Supports position, speed, and torque control.

• Rugged Through-Hole Design: Industrial-grade for cabinet installation.

• Full Compatibility: Direct drop-in replacement for original Y79-equipped CNC systems.

• Comprehensive Diagnostics: LED fault codes for quick troubleshooting.

• High Stability: Ultra-smooth low-speed operation and fast dynamic response.

6. Typical Applications

• Yasnac CNC lathes, milling machines, machining centers

• Legacy OEM automation production lines

• Precision positioning systems requiring fixed-parameter control

• Retrofit and maintenance replacement for specialized CNC machinery

7. Compatibility & Replacement Notes

• Matched Motor: Yaskawa 1.5 kW 200V AC servo motor with incremental encoder.

• Critical Note: -Y79 is a custom variant. It cannot be substituted with the standard CACR-SR15SB1AF or other custom versions (e.g., -Y78, -Y100, -Y160).

• Requirement: Must be replaced with an identical CACR-SR15SB1AF-Y79 unit to ensure proper machine operation.

• Parameters: Internal control parameters are factory-set and locked; user modification is not recommended.