# Serial Bus Servo Driver Board (9~12.6V DC, Control up to 253 Servos)

**Type:** Product page · **SKU:** DRI0057 · **Brand:** [DFRobot](https://core-electronics.com.au/brands/dfrobot-australia)
**Page:** https://core-electronics.com.au/dfrobot-serial-bus-servo-controller-usb-uart-253-servos-9-12-6v-dc.html ([markdown](https://core-electronics.com.au/dfrobot-serial-bus-servo-controller-usb-uart-253-servos-9-12-6v-dc.html.md))

## Retired product

This product is retired and no longer available for purchase. Replaced by: WS-25514.

**Replacement:** https://core-electronics.com.au/catalog/product/view/sku/WS-25514

## Description

The Serial Bus Servo Driver Board is a compact, high-performance controller engineered to **manage up to 253 ST/SC series bus servos** for complex robotic systems. Featuring both USB and UART communication interfaces, it acts as a central bridge between a host controller and the servo network, operating on a 9-12.6V DC power supply. Its core strength lies in not only sending commands but also reading real-time feedback on each servo's angle, load, and voltage. This complete integration of power management and bi-directional control circuitry streamlines the development of advanced robotics, from multi-axis robotic arms to sophisticated legged robots.

![Overview of Serial Bus Servo Driver Board](https://dfimg.dfrobot.com/enshop/image/data/DRI0057/1_0x0.jpg.webp)

Figure: Overview of Serial Bus Servo Driver Board

**High-Capacity Servo Control**

This servo driver board unlocks the potential for large-scale robotic projects by supporting the simultaneous control of up to 253 ST/SC series bus servos. This capability allows for the creation of highly articulated and intricate mechanisms, far beyond the limits of traditional PWM servo controllers, making it perfect for systems with a high degree of freedom.

**Flexible Dual Communication Interfaces**

Equipped with both USB and UART interfaces, the bus servo controller offers exceptional versatility. The USB port provides a straightforward plug-and-play connection to a host computer, ideal for rapid prototyping, debugging, and direct control via software. The UART interface allows for seamless integration with a wide range of microcontrollers and embedded systems, providing a reliable communication link for deployed applications.

![Serial Bus Servo Driver Board equipped with USB and UART interfaces](https://dfimg.dfrobot.com/enshop/image/data/DRI0057/2_0x0.jpg.webp)Figure: Serial Bus Servo Driver Board equipped with USB and UART interfaces

**Real-Time Data Feedback**

A key advantage of this serial bus Servo driver board is its support for bi-directional communication. It can query each servo individually to read back critical operational data, including current angle, operational load, internal voltage, and working mode. This feedback is essential for creating sophisticated, closed-loop control systems where precision, error detection, and dynamic adjustments are required.

**Simplified and Stable Power Integration**

The serial bus servo driver board features both a DC 5.5x2.1mm socket and a terminal block for power input, accommodating a 9-12.6V supply that matches the operating voltage of the servos. This dual-input design provides flexibility for both prototyping and permanent installations, while the integrated stable control circuitry ensures reliable power delivery for smooth and consistent servo operation.

**Advanced Servo Configuration**

Beyond simple rotational control, this driver board allows for advanced configuration of connected servos. It provides the functionality to programmatically set unique IDs for each servo on the bus and to switch their operational state between standard servo mode (positional control) and motor mode (continuous rotation), offering greater customization for diverse mechanical designs.

![Wiring Diagram of Serial Bus Servo Driver Board with Host Computer](https://dfimg.dfrobot.com/enshop/image/data/DRI0057/3_0x0.jpg.webp)

![Wiring Diagram of Serial Bus Servo Driver Board with Host Computer](https://dfimg.dfrobot.com/enshop/image/data/DRI0057/6_0x0.png.webp)

Figure: Wiring Diagram of Serial Bus Servo Driver Board with Host Computer

### Specification

20. Servo Compatibility: ST & SC Series Serial Bus Servos
21. Max Servo Count: 253
22. Input Voltage: DC 9-12.6V (Must match servo voltage)
23. Communication: USB & UART
24. Power Connectors: DC 5.5x2.1mm Jack, 2-pin Terminal Block
25. Key Functions: ID Programming, Mode Switching (Servo/Motor), Real-time Data Readback (Angle, Load, Voltage)
26. Dimensions: 42 x 33mm
### Documents

28. [Schematic](https://dfimg.dfrobot.com/95a9cd2bec674008b039ef43bcd5638e/wikien/592595c9f54ea10eddfc0391433dff3d.pdf)
29. [3D Model](https://dfimg.dfrobot.com/95a9cd2bec674008b039ef43bcd5638e/wikien/e2470d72f08ebaa12a169e3f7c6eedb8.zip)

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/D/R/DRI0057-1.jpg)