YASKAWA CACR-PR Servo Amplifier Modules

Technical Dossier

Product Details And Specifications

YASKAWA CACR-PR Series: Comprehensive Module Range and Technical Overview

The YASKAWA CACR-PR series represents a foundational line of analog servo amplifiers deployed across global heavy industry, including petrochemical refineries, nuclear power auxiliary systems, steel rolling mills, and continuous-process chemical plants. Designed to interface with YASKAWA's MP-series and older YASNAC motion controllers, CACR-PR units deliver closed-loop velocity and torque control for AC servomotors in environments where long-term parts availability is a critical operational requirement. Installed base across Asia-Pacific, Europe, and the Americas remains substantial, making lifecycle support a primary concern for plant maintenance engineers.

The Evolution of CACR-PR Architecture

The CACR-PR series was introduced as part of YASKAWA's transition from DC servo technology to brushless AC servo systems during the late 1980s and through the 1990s. Early variants used analog command interfaces (±10 V velocity reference) and resolver-based feedback, establishing a hardware architecture that remained consistent across multiple sub-series revisions. The "PR" designation denotes the analog-input, resolver-feedback amplifier class, distinguishing it from later digital-interface series such as SGDH (SERVOPACK) and SGDV (Sigma-5), which introduced MECHATROLINK-II/III fieldbus communication.

Compatibility considerations are significant for maintenance teams: CACR-PR amplifiers are not pin-compatible with SGDH or SGDV units and require matched YASKAWA servomotors from the USAREM, USAFED, or equivalent legacy motor families. Replacement with modern SGDV or SGDH units requires re-engineering of the command interface, feedback wiring, and parameter configuration — a scope that many facilities choose to avoid by sourcing original CACR-PR spare units instead. The series is classified as end-of-life (EOL) by YASKAWA, with no active production; all procurement is through authorized distributors and specialist industrial spare parts suppliers.

CACR-PR Full Catalog & Functionalities (SKU List)

The following SKUs represent verified models within the YASKAWA CACR-PR servo amplifier series, organized by rated output capacity and variant classification:

CACR-PR01AD4NR: 100W analog servo amplifier, ±10V velocity cmd, resolver feedback, single-phase 200VAC input.
CACR-PR02AD4NR: 200W analog servo amplifier, resolver feedback, single-phase 200VAC, standard I/O connector.
CACR-PR03AD4NR: 300W analog servo amplifier, resolver feedback, single-phase 200VAC, DIN-rail mountable.
CACR-PR05AD4NR: 500W analog servo amplifier, resolver feedback, single-phase 200VAC, enhanced braking resistor circuit.
CACR-PR10AD4NR: 1.0kW analog servo amplifier, resolver feedback, three-phase 200VAC input, standard chassis.
CACR-PR15AD4NR: 1.5kW analog servo amplifier, resolver feedback, three-phase 200VAC, integrated dynamic brake.
CACR-PR20AD4NR: 2.0kW analog servo amplifier, resolver feedback, three-phase 200VAC, high-inertia load rated.
CACR-PR30AD4NR: 3.0kW analog servo amplifier, resolver feedback, three-phase 200VAC, extended current rating.
CACR-PR50AD4NR: 5.0kW analog servo amplifier, resolver feedback, three-phase 200VAC, heavy-duty industrial chassis.
CACR-PR01AD3NR: 100W analog servo amplifier, 100VAC single-phase input variant, resolver feedback.
CACR-PR02AD3NR: 200W analog servo amplifier, 100VAC single-phase input variant, resolver feedback.
CACR-PR05AD3NR: 500W analog servo amplifier, 100VAC single-phase input variant, resolver feedback.
CACR-PR10AD3NR: 1.0kW analog servo amplifier, 100VAC three-phase input variant, resolver feedback.
CACR-PR01AD4SR: 100W analog servo amplifier, 200VAC, encoder feedback variant (incremental encoder interface).
CACR-PR05AD4SR: 500W analog servo amplifier, 200VAC, encoder feedback variant, standard I/O.
CACR-PR10AD4SR: 1.0kW analog servo amplifier, 200VAC, encoder feedback variant, three-phase input.
CACR-PR20AD4SR: 2.0kW analog servo amplifier, 200VAC, encoder feedback variant, high-current output stage.

Sourcing Hard-to-Find & Obsolete CACR-PR Parts

DriveKNMS maintains a dedicated inventory program for EOL YASKAWA servo amplifier series, including the full CACR-PR range. Because YASKAWA has discontinued active production of CACR-PR units, procurement channels are limited to: surplus industrial stock, refurbished units from decommissioned machinery, and tested pull-outs from controlled dismantling projects. DriveKNMS sources CACR-PR amplifiers through a verified global supplier network, applying incoming inspection protocols before any unit enters available inventory. For facilities operating YASNAC or MP-series motion systems that cannot be economically upgraded, DriveKNMS provides a long-term maintenance supply agreement covering priority allocation of CACR-PR stock, cross-reference verification against plant BOM data, and documented traceability records for each unit shipped. Customers requiring multiple units for critical spares programs are encouraged to submit consolidated lists for batch sourcing assessment.

Quality Control for the CACR-PR Range

CACR-PR servo amplifiers incorporate multi-layer PCB assemblies with proprietary YASKAWA gate driver circuits, resolver signal conditioning boards, and backplane bus connectors that require specialized test procedures. DriveKNMS applies the following verification steps to all CACR-PR units processed through its facility: (1) Visual inspection of power stage components, capacitor condition assessment, and connector integrity check. (2) Dielectric withstand test on AC input terminals per IEC 61800-5-1 requirements. (3) Functional energization under controlled load using matched YASKAWA servomotor test bench, verifying velocity loop response, torque limit function, and fault output relay operation. (4) Resolver signal integrity verification: amplitude, phase, and frequency response within YASKAWA specification. (5) Final parameter verification and reset to factory default state. Each unit is issued a test record documenting pass/fail criteria and technician sign-off prior to shipment.