Yaskawa CACR-SR20BB1BF Digital Servo Drive
May 29, 2026

Yaskawa CACR-SR20BB1BF Digital Servo Drive

The CACR-SR20BB1BF is a 2.0 kW digital AC servo drive belonging to Yaskawa CACR-SR (VS-800) series, widely applied to traditional CNC machine tools and general industrial automation systems. It adopts built-in forced air cooling, with 14.7 A continuous current and 35 A short-term peak current. Equipped with standard incremental encoder interface and BF general base firmware, this drive features stable running performance and excellent universal compatibility, suitable for standard servo matching and conventional motion control equipment.

Description

Model Definition

CACR: AC servo drive (SERVOPACK) product family
SR: VS-800 series for integrated speed and position control
20: 2.0 kW rated output power
B: Three-phase 200 VAC main power supply specification
B: Standard general-purpose hardware configuration
1: Single-phase 200 VAC control power supply
B: Standard incremental encoder signal interface
F: BF universal base firmware for general industrial use

Technical Specifications

Electrical Parameters

Main power supply: 3-phase 200–230 V AC, tolerance -15% to +10%, 50/60 Hz
Control power supply: 1-phase 200–230 V AC, tolerance -15% to +10%, 50/60 Hz
DC bus voltage: Internal integrated DC bus circuit
Continuous output current: 14.7 A
Peak output current: 35 A for short-time operation
Output frequency range: 0 Hz to 400 Hz
Power dissipation: Approximately 120 W
Compatible motors: Yaskawa S-series servo motors equipped with incremental encoders

Mechanical & Environmental Parameters

Cooling method: Built-in forced air cooling with internal fan
Protection class: IP20 for the whole unit
Operating temperature: 0 °C to +55 °C
Storage temperature: -20 °C to +85 °C
Maximum installation altitude: 1000 m, 1% performance derating per 100 m above 1000 m
Vibration resistance: 0.5 g (10–60 Hz), 0.2 g (60–200 Hz)
Dimensions (H×W×D): 380 mm × 150 mm × 200 mm
Weight: Approximately 5.8 kg

Interface and Communication Configuration

Motor feedback: CN2 interface supporting standard incremental encoder signals
System bus: Internal bus design for signal transmission
Main power interface: R, S, T for main power input, L1, L2 for control power input, U, V, W for motor output
Regenerative interface: P, B terminals for external regenerative resistor connection
Control I/O: CN1 50-pin interface with multiple isolated digital inputs and outputs
Analog interface: ±10 V DC analog command input and speed monitoring output
Communication: RS232 and RS485 interfaces supporting Modbus RTU protocol
Display unit: Seven-segment LED display for operating status and alarm codes

Core Functions

Current, speed and position three-loop control ensures stable and high-precision motion performance.
Incremental encoder interface delivers reliable signal transmission for conventional servo applications.
BF universal base firmware provides strong compatibility with various legacy control systems.
Compact vertical structure adapts to standard industrial cabinet installation space.
Complete protection against overvoltage, undervoltage, overcurrent, overheating, encoder fault and overload.
Supports torque, speed and position control modes to meet various working conditions.
Mature hardware and software design facilitates daily maintenance and routine inspection.

Application Scenarios

Legacy CNC lathes, milling machines and machining centers with incremental encoder servo systems
Standard industrial automation equipment and ordinary production lines without special parameter requirements
Rotary tables, material handling and medium-sized automated conveying equipment
VS-800 series servo system replacement and general production line renovation projects
Universal servo matching occasions for common machine tools and automation devices

Usage and Maintenance

Maintain smooth air circulation inside the cabinet to guarantee heat dissipation effect.
Keep ambient temperature within the standard range to prevent performance decline.
Complete wiring of power, feedback, control and communication circuits before power-on.
Verify motor type and encoder specification to match the drive configuration.
Clean heat dissipation components and air passages every six months, and inspect terminal connections regularly.
Calibrate control loops, feedback signals and communication status once a year to maintain long-term stable operation.


Get a Quote