SAMSUNG CSDJ-10BX2 AC Servo Drive – CSDJ Series

SAMSUNG CSDJ-10BX2: 1kW Velocity-Loop Servo Drive for High-Precision Industrial Motion Control

The SAMSUNG CSDJ-10BX2 is a 1kW-class AC servo drive operating on a 200–230V AC supply, designed for closed-loop motion control in demanding manufacturing environments. Within the CSDJ product family, the -10BX2 variant targets the mid-range torque tier where velocity bandwidth, encoder signal integrity, and thermal stability must be maintained simultaneously across extended duty cycles. Its architecture reflects the engineering priorities of semiconductor equipment builders, precision machine tool OEMs, and automated assembly integrators who cannot tolerate positional drift or velocity ripple under variable load conditions.

Unlike general-purpose inverters that regulate speed through open-loop V/f control, the CSDJ-10BX2 operates exclusively in closed-loop servo mode. The drive continuously compares the commanded position or velocity reference against real-time encoder feedback, computing a corrective torque output at the current-loop update rate. This deterministic correction cycle — executed in hardware at sub-millisecond intervals — is what separates a servo drive from a variable frequency drive in applications where repeatability is measured in micrometers rather than millimeters.

Real-time Stock & RFQ: [email protected] | WhatsApp: +86 18359268345

Technical Parameters

Hardware Logical Analysis

Current Loop Architecture and PWM Generation
The CSDJ-10BX2 implements a three-tier control hierarchy: position loop → velocity loop → current loop. The innermost current loop operates at the highest update frequency, typically in the range of 16–32 kHz PWM switching, which directly determines the smoothness of torque output at low speeds. The IGBT power stage uses space-vector PWM (SVPWM) modulation rather than sinusoidal PWM, which reduces harmonic distortion in the motor winding current and lowers audible noise — a measurable advantage in precision equipment where mechanical resonance can corrupt encoder feedback.

Encoder Signal Processing and Noise Immunity
The encoder input stage accepts differential line-driver signals (RS-422 compatible), which provides common-mode noise rejection of typically 7V or greater. In industrial environments where servo cables run parallel to power conductors, common-mode interference is the primary source of encoder count errors. The differential receiver architecture, combined with hardware quadrature decoding logic, ensures that position counts remain accurate even when the cable shield is imperfectly grounded. The drive’s encoder interface also monitors signal integrity: loss of A/B phase differential or Z-pulse anomalies trigger an immediate fault output, preventing runaway conditions before mechanical damage occurs.

EMC Design and Conducted Emission Suppression
The CSDJ-10BX2 incorporates an internal EMI filter on the AC input stage, attenuating conducted emissions in the 150 kHz–30 MHz band to comply with EN 61800-3 Category C2 limits. The DC bus capacitor bank is sized to absorb regenerative energy spikes during rapid deceleration without triggering overvoltage faults under typical inertia loads. For high-inertia applications — such as rotary tables or large-diameter spindles — the external regenerative resistor terminal allows the energy dissipation capacity to be scaled independently of the drive’s thermal rating.

Auto-Gain Tuning and Notch Filter
The drive includes an online auto-tuning function that estimates the mechanical load inertia ratio and sets proportional-integral gains for both the velocity and position loops accordingly. For systems with structural resonance — common in long ball-screw assemblies or belt-driven axes — a configurable notch filter can be applied at a user-defined frequency to suppress the resonant peak without reducing overall loop bandwidth. This is a hardware-implemented digital filter, not a software approximation, which means its phase response is deterministic and does not vary with CPU load.

System Integration Benefits

• Deterministic Position Loop Closure: The position loop executes at a fixed hardware interrupt rate, ensuring that loop closure latency does not vary with communication bus load or background task scheduling — a prerequisite for multi-axis synchronization in gantry and interpolation applications.
• Analog Torque Limiting: An external analog input (0–10V) can be mapped to a real-time torque limit, allowing the host PLC to dynamically cap output torque during workpiece clamping or press-fit operations without issuing a parameter write command over serial.
• Electronic Gear Ratio: The pulse command input supports configurable numerator/denominator gear ratios, enabling the drive to accept a standard 10,000 pulse/rev command from a motion controller while driving a motor with a 2,500-line encoder — eliminating the need for external pulse multiplier hardware.
• In-Position Output Signal: A dedicated digital output asserts when the position error falls within a user-defined window (in encoder counts), providing a hardware handshake to the PLC without requiring the controller to poll a status register over serial communication.
• Fault History Register: The drive stores the last eight fault codes with timestamps accessible via the front-panel keypad or RS-485 interface, enabling maintenance engineers to diagnose intermittent faults without installing additional data logging hardware.
• Velocity Feed-Forward: A configurable velocity feed-forward gain reduces following error during constant-velocity traversal, which directly improves surface finish quality in contouring applications by minimizing the lag between commanded and actual position.
• Soft-Start and Soft-Stop Ramp: Programmable acceleration and deceleration time constants (independent for each direction) prevent mechanical shock on belt drives and rack-and-pinion systems, extending the service life of mechanical transmission components.
• Parameter Cloning via RS-485: Drive parameters can be read from a master unit and written to replacement units over the RS-485 bus, reducing recommissioning time after a field replacement to under five minutes — a significant advantage in high-availability production environments.

Quality Assurance & Global Logistics

Every SAMSUNG CSDJ-10BX2 unit supplied by siemensplc.com is sourced through verified industrial distribution channels. Each unit undergoes label and serial number authentication against manufacturer batch records before acceptance into inventory. Physical inspection covers connector pin integrity, PCB conformal coating condition, and housing seal status. Where test equipment is available, a power-on functional check confirms that the drive initializes without fault codes and that encoder feedback is correctly processed.

Packaging follows anti-static and mechanical protection protocols: the drive is placed in an ESD-safe bag, surrounded by closed-cell foam inserts within a double-wall corrugated carton. This packaging specification is validated against ISTA 2A transit simulation criteria, ensuring that the unit arrives at its destination in the same condition it left our Xiamen warehouse.

Shipments originate from Xiamen, China — a major international logistics hub with direct access to DHL Express, FedEx International Priority, UPS Worldwide Express, and consolidated sea freight services. Standard express delivery reaches most destinations in Southeast Asia within 2–3 business days, Europe within 3–5 business days, and North America within 3–5 business days. For time-critical plant shutdowns, same-day dispatch is available for orders confirmed before 14:00 CST. All shipments include a commercial invoice, packing list, and certificate of origin for customs clearance. The 12-month warranty covers manufacturing defects under normal operating conditions and is honored from the date of shipment.

Contact Information

Email: [email protected]
WhatsApp: +86 18359268345
Web: siemensplc.com
Location: Xiamen, China
© 2026 siemensplc.com. All rights reserved.