Waveshare 2-Channel Isolated RS485 HAT
Waveshare 2-Channel Isolated RS485 HAT - Image 2
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SKU: SBCD-1422
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Waveshare 2-Channel Isolated RS485 HAT

₹1,609.00 (Inclusive of all taxes)
Out of Stock

The Waveshare 2-Channel Isolated RS485 HAT provides robust dual-channel RS485 communication for Raspberry Pi boards via an SPI interface, leveraging the SC16IS752 UART expansion chip and SP3485 transceivers. It features integrated isolation and protection circuits for enhanced stability and reliability in industrial environments.

Features

  • Dual-channel isolated RS485 expansion for Raspberry Pi.
  • Utilizes SC16IS752 UART expansion chip and SP3485 RS485 transceivers.
  • SPI communication interface with data rates up to 921600bps.
  • Integrated power isolation, ADI magnetic isolation, and TVS diode protection.
  • Supports automatic or manual transceiving modes via DIP switch configuration.

Out of stock

Description

This Waveshare 2-Channel Isolated RS485 Expansion HAT is purpose-built to equip Raspberry Pi boards with reliable, high-speed dual-channel RS485 communication capabilities. It integrates the SC16IS752, a dual-channel high-performance UART expansion chip, which communicates with the Raspberry Pi via an SPI interface. Each RS485 channel is managed by an SP3485 transceiver, enabling robust data exchange across industrial networks.

Designed for demanding applications, the HAT incorporates comprehensive protection features including power supply isolation (B0505LS), ADI magnetical isolation (ADUM1412), and TVS (Transient Voltage Suppressor) diodes (SMAJ12CA). These circuits effectively suppress surge voltages, transient spikes, and provide lightning and anti-electrostatic protection, ensuring stable and safe operation. With support for both 3.3V and 5V operating voltages and configurable auto/manual transceiving modes, this HAT is an ideal solution for industrial automation, distributed control systems, and long-distance data communication where stability, reliability, and safety are paramount.

Key Features

  • Standard Raspberry Pi 40PIN GPIO extension header ensures compatibility with all Raspberry Pi series boards.
  • Adopts SC16IS752+SP3485 dual-chip combination for SPI to RS485 conversion, supporting data rates up to 921600bps.
  • Allows flexible data transceiving manually or automatically, configurable via onboard DIP switches.
  • Integrated TVS (Transient Voltage Suppressor) for effective suppression of surge voltage and transient spike voltage.
  • Onboard auto-recovery fuse and protection diodes provide over-current/over-voltage proof and improve shock resistance.
  • Includes onboard LEDs for clear indication of power status and UART transceiving activity.
  • Breakout SPI control pins enable connectivity with other host control boards, such as Arduino.
  • Features ADUM1412 digital isolator and B0505LS power isolation module for robust electrical separation.

Applications

  • Industrial automation and control systems.
  • Distributed control systems (DCS).
  • Long-distance data communication networks.
  • Environmental monitoring and data acquisition.
  • Building automation and smart factory solutions.

Technical Specifications

UART Expansion ChipSC16IS752
RS485 TransceiverSP3485
Communication InterfaceSPI
Data Transfer Rate300 ~ 921600 bps
Operating Voltage3.3V / 5V
Mounting Hole Diameter3.0mm
Length6.5 cm
Width5.65 cm

Frequently Asked Questions

What is the primary function of the Waveshare 2-Channel Isolated RS485 HAT?

The HAT provides dual-channel RS485 communication for Raspberry Pi boards. It converts the Raspberry Pi's SPI interface into two independent RS485 ports, enabling robust, long-distance serial data exchange, especially for industrial applications. It ensures reliable data integrity and system resilience.

What protection features are integrated into this RS485 HAT?

This HAT includes several protection mechanisms for enhanced reliability. It features power supply isolation, ADI magnetic isolation for data lines, TVS (Transient Voltage Suppressor) diodes for surge and electrostatic protection, and an auto-recovery fuse to guard against over-current conditions. These ensure stable operation in harsh environments.

Which Raspberry Pi models are compatible with this HAT?

This Waveshare RS485 HAT is designed with the standard Raspberry Pi 40PIN GPIO extension header. This makes it compatible with most Raspberry Pi models that feature the 40-pin GPIO, including Raspberry Pi 4 B, Raspberry Pi 3 B+, Raspberry Pi Zero series, and more, offering broad ecosystem support.

How do I configure the operating mode (auto/manual transceiving)?

The operating mode, either half-automatic or full-automatic transceiving, is configured via an onboard DIP switch. Users can select the desired mode based on their application requirements. Full-auto mode simplifies communication by automatically handling the data direction, ideal for many industrial protocols.

Can this HAT be used with other host control boards besides Raspberry Pi?

Yes, while primarily designed for Raspberry Pi, the HAT breaks out the SPI control pins. This allows advanced users to connect it to other host control boards, such as Arduino or custom microcontrollers, enabling them to leverage the isolated dual-channel RS485 functionality in diverse embedded projects.

Package Includes

  • 1 x 2-CH RS485 HAT
  • 1 x 2x20PIN female pin header
  • 1 x Raspberry Pi screws pack (2pcs)

Additional Information

Weight 0.029 kg
Dimensions 6.5 × 5.65 cm

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