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Low Voltage Servo Drive
RS Series Standard Type
Single-axis, dual-in-one with multiple options Single-axis RMS current up to 100A Supports CAN bus interface with built-in standard CANopen Supports multi-turn absolute encoders Mass-proven in AGV, AMR, and other industries
Product Overview
Specifications
Series Models
Naming Rules
Dimension Description
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 The RS Series low-voltage servo system is a new generation high-performance, high-reliability product developed by HollySys Motor Technology Co., Ltd. in response to market demands. The RS Series drivers operate on low-voltage DC power supply, utilize digital signal processing chips (DSP) as the core control unit, and feature high-speed data processing capabilities. They employ advanced full-digital motor control algorithms to precisely control the position, speed, and torque of permanent magnet synchronous low-voltage servo motors. Supporting multiple control methods including CAN, Modbus bus, pulse, and analog signals, the system is widely applied in mobile equipment fields such as service robots, inspection robots, and logistics AGVs.

  • Available in single-axis or dual-in-one configurations
  • Single-axis RMS current up to 75A
  • Universal motion control functions: position/speed/torque control, mode switching
  • Fast independent FPGA current loop processing with excellent dynamic tracking
  • Built-in torque observer technology for automatic load adaptation
  • Switchable control gain
  • Overload automatic reduction algorithm with parameterizable overload protection selection
  • RS485 communication interface supporting MODBUS protocol
  • CAN bus interface with built-in standard CANopen
  • Supports 4 digital inputs, 2 digital outputs, and 2 analog inputs
  • Software-configurable control ports for flexible and reliable operation
  • Pulse input interface with input frequency up to 1MHz
  • Built-in overcurrent, overvoltage, and overheat protection for reliable operation
  • Multi-channel power device parallel technology for reliable output
  • Aluminum-based heat dissipation for reliable high-current operation
  • BROTHER partner drive fault monitoring for coordinated system operation
  • Optimized CAN bus transmission mechanism ensuring data throughput reliability without frame loss

Technical Advantages

BROTHER Partner Monitoring

The BROTHER partner monitoring system utilizes bus object synchronized listening functionality. When a driver reports an error or fault, it notifies other drivers via the CAN bus and immediately enters shutdown mode to ensure safe, synchronized, and rapid stopping.

Enhanced CAN Bus Transmission Algorithm

Comprehensive and reliable CAN bus data processing ensures zero packet loss

Multi-Power Device Parallel Technology

 

The RS Series drivers have been successfully mass-deployed in logistics automation, factory material handling robots, and multiple other industries.

Supply Voltage
24~60VDC
Control Characteristics
Control Mode
SVPWM modulation, closed-loop vector control
Speed Control Accuracy
± 1rpm
Electronic Gear
(1~9999)/(1~9999)
Position Control Accuracy
±1 pulse
Braking Method
New regenerative energy consumption braking method
Overload Capacity
200%, 15s
Input/Output Interfaces
Digital Input
4-channel optocoupler isolated input (Single-axis)
8-channel optocoupler isolated input (Dual-axis)
Digital Output
2-channel optocoupler isolated output, OC output connection (Single-axis)
4-channel optocoupler isolated output, OC output connection (Dual-axis)
Analog Input
1 channel: -10V~+10V, op-amp input buffer interface, electrically non-isolated (Single-axis)
2 channels: -10V~+10V, op-amp input buffer interface, electrically non-isolated (Dual-axis)
Encoder Input
Supports QEP incremental
Encoder Divider Output
Under standard motor encoder signal (default 2500 lines), supports arbitrary pulse output of 1~2500 lines (Single-axis only)
Pulse Input
Single pulse positive/negative logic, double pulse positive/negative logic, quadrature pulse positive/negative logic, six input modes (Single-axis)
Single pulse positive logic (Dual-axis)
Communication Bus
RS485, CANOpen
 

RS1xxxxx Series Single-Axis Drive

RS10240C Compact Size Low Voltage Servo Drive
Unit: mm
RS10240E Compact Full-Function Low Voltage Servo Drive
Unit: mm

RS10270E Single-Axis Low Voltage Servo Drive
Unit: mm

RS102100B High-Power Drive
Unit: mm

RS102300B High-Power Drive
Unit: mm

RS102100A High-Power Drive
Unit: mm

RS102300A High-Power Drive
Unit: mm

RS20270EH Integrated Low Voltage Servo Drive

RS20270EA Integrated Low Voltage Servo Drive
RS20270DA Integrated Low Voltage Servo Drive
RS20270C/RS20270D Series Integrated Low Voltage Servo Drive

RS20270H Integrated Low Voltage Servo Drive
Unit: mm

Model English Chinese Materials Update Date
DS/RS Series Low-Voltage Servo System Selection Guide -- 2026-03-03
RS10240E Low Voltage Servo Drive Operation Manual -- 2025-03-05
RS10270E Low Voltage Servo Drive Operation Manual -- 2024-08-22
RS102100B Low Voltage Servo Drive Operation Manual -- 2025-05-22
RS102300B Low Voltage Servo Drive Operation Manual -- 2025-05-22
RS20270EA Low Voltage Servo Drive Operation Manual -- 2026-02-25
RS20270EH Drive Operating Manual -- 2025-05-08
RS20270DA Low Voltage Servo Drive Operation Manual -- 2025-02-26
RS20270H Low Voltage Servo Drive Operation Manual -- 2022-08-22
RS20270C/RS20270D Low Voltage Servo Drive Operation Manual -- 2022-03-03
DS/RS Series Low-Voltage Servo Drive Communication Manual V9.0 -- 2025-11-11
RS Series Dual-Function Driver Online Upgrade Protocol Specification -- 2022-04-29
RS102*0E Series Absolute Encoder Motor Driver User Guide V1.0 -- 2023-07-31
RS102*0A Series Absolute Encoder Motor Driver User Guide V1.5 -- 2020-06-17
SC-RSDC User Manual Version 2 -- 2019-08-19
DS/RS Series Low-Voltage Servo System Selection Guide -- 2026-02-26
RS Series Single-Axis Servo Drive EDS File -- 2022-12-26
DS/RS Series Dual-in-One Low-Voltage Servo Drive EDS File -- 2022-06-22
RS102**A/B Series Single-Axis Low-Voltage Servo Drive User Manual -- 2021-05-17
RS10240C Low Voltage Servo Drive Operation Manual -- 2020-05-15