Yaskawa USABKM-50-MK12

The USABKM‑50‑MK12 is an AC servo drive/power module launched by Yaskawa, designed for industrial automation systems requiring high-precision position, speed, and torque control. As a member of Yaskawa’s USABKM series, it is tailored for medium and low-power (≈1 kW) servo systems, compatible with a wide range of servo motors, and operable with a three-phase 200 V AC power supply.

Key Technical Specifications

• Rated Power: 1.3 kW
• Rated Voltage: Three-phase AC 200 V (compatible with 220 V/230 V systems)
• Rated Speed: 3000 r/min (for matched motors)
• Encoder: 20-bit incremental serial encoder with a resolution of approximately 1,000,000 pulses per revolution
• Control Method: Compatible with Yaskawa standard servo control protocols (e.g., S‑Series, Sigma‑7)
• Dimensions: Standard 19-inch rack mount (refer to the product manual for exact dimensions)
• Operating Temperature Range: 0 °C - +55 °C (industrial-grade protective housing available as an option)

Product Features

1. High-Precision Closed-Loop ControlEquipped with a high-resolution incremental encoder, it achieves submicron-level positioning accuracy to meet the stringent requirements of precision motion control scenarios.
2. Compact & Reliable Power ModuleDelivering a rated power of 1.3 kW within a compact footprint, it provides sufficient torque output and is ideal for installation in space-constrained enclosures.
3. Comprehensive Protection FunctionsIntegrates full-spectrum protection against overcurrent, overvoltage, overheating, undervoltage, and phase sequence errors, significantly enhancing the operational safety of the entire system.
4. Strong CompatibilitySupports Yaskawa’s commonly used servo motor series (e.g., Σ‑Series, S‑Series), facilitating seamless upgrades of existing automation systems without extensive reconfiguration.
5. Easy IntegrationFeatures a standard 19-inch rack-mount design and unified terminal blocks, enabling quick wiring and on-site commissioning to reduce integration time and labor costs.

Structure & Components

1. Power Module Main BodyInternally incorporates power semiconductor (IGBT/MOSFET) bridge inverters, rectifier and filter circuits, and a dedicated heat dissipation system to ensure stable power conversion.
2. Control UnitBuilt-in DSP/microprocessor enables real-time calculation of motion commands and closed-loop control, ensuring fast response to dynamic load changes.
3. Encoder InterfaceA dedicated serial interface card connects to the incremental encoder, providing high-speed counting and accurate position feedback for precise motion regulation.
4. Terminal BlocksClassified into power terminals, phase terminals, encoder terminals, and signal communication terminals (e.g., EtherCAT, PROFINET) for clear and organized wiring.
5. Heat Dissipation DeviceEquipped with an internal fan or passive heat sink to maintain the operating temperature within a safe range during full-load operation.

Installation & Maintenance Guidelines

Pre-Installation Inspection

• Verify that the cabinet dimensions comply with the 19-inch rack standard and reserve adequate space for heat dissipation to prevent thermal accumulation.
• Check that the power phase sequence, rated voltage, and grounding configuration meet the product specifications to avoid electrical faults.

Wiring Essentials

• Follow the wiring diagram in the product manual to connect power cables, phase cables, encoder cables, and communication cables to their respective terminal blocks, avoiding cross-connection or miswiring.
• Use cables compliant with IEC standards for high-power phase lines and ensure the wire gauge is sufficient to handle the rated current, preventing overheating due to insufficient conductivity.

Commissioning Procedures

1. Perform a no-load check before powering on to confirm that all indicator lights function normally and no error codes are displayed.
2. Use Yaskawa’s dedicated commissioning software (e.g., SigmaWin+) to configure key parameters, including rated current, acceleration/deceleration time, and encoder resolution.
3. Conduct closed-loop tests to verify that the torque and speed response align with the design requirements before putting the system into formal operation.

Routine Maintenance

• Regularly inspect the cooling fan or heat sink for dust accumulation and clean it promptly to maintain optimal heat dissipation efficiency.
• Inspect all electrical connections every 6–12 months to ensure terminal screws are tight and free from loosening, which may cause poor contact.
• Monitor the operation log regularly and address alarm messages such as overcurrent and overheating in a timely manner to prevent potential system failures.

Troubleshooting

1. Overcurrent/OverheatingCheck if the load exceeds the rated power. If necessary, enhance heat dissipation measures or reduce the operating speed to bring the load within the rated range.
2. Encoder Signal LossVerify the integrity and connection reliability of the encoder cable. If the issue persists, replace the encoder or inspect the cable shielding for damage.
3. Communication AbnormalitiesTroubleshoot the network wiring, IP address configuration, and protocol compatibility to restore stable data transmission between the servo drive and the control system.

If you would like to learn more about our products and services, please feel free to contact us at any time!

• Sales Manager : Jinny
• Email : sales5@xrjdcs.com
• Whatsapp/Mobile:+86 15359273791

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