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Green circuit board with 40-pin header, two terminal blocks, DIP switches and indicator LEDs

LORDWORLD

LORDWORLD 2-CH Isolated RS485 Expansion HAT development board

SKU CH-76J1-MQ95Q

Adds two isolated RS-485 channels to Raspberry Pi or Jetson Nano via SPI with 921600 bps throughput and onboard surge protection

  • Fits Raspberry Pi and Jetson Nano via 40PIN GPIO header
  • Converts SPI to RS485 at up to 921600bps using SC16IS752+SP3485 chips
  • DIP switch selects manual or automatic transceiver modes
  • TVS suppressor plus auto-recovery fuse protect against surges and over-current
  • Onboard LEDs show power and data-transceiver status

2-Channel Isolated RS485 HAT for Raspberry Pi

This development board adds two isolated RS485 ports to Raspberry Pi series boards and Jetson Nano via the standard 40PIN GPIO header. It uses an SC16IS752 plus SP3485 chip combination to convert SPI signals to RS485 at rates up to 921600bps. The board targets makers and engineers building industrial or automation projects that need reliable long-distance serial links.

Check 40PIN header and SPI availability

Verify that your host board exposes the full 40PIN GPIO header and that the SPI interface is free for the SC16IS752 bridge. The HAT draws power and logic levels directly from the header, so confirm voltage compatibility with your specific Raspberry Pi or Jetson Nano model. Ensure your software stack can address the UART registers exposed over SPI for manual or automatic transceiver control.

Protection circuits and status LEDs

Onboard TVS diodes suppress surge and transient spikes, providing lightning-proof and anti-electrostatic defence for the RS485 lines. An auto-recovery fuse and protection diodes maintain stable current and voltage outputs, adding over-current and over-voltage resilience. Integrated LEDs show power presence and transceiver activity, simplifying field diagnostics without extra test equipment.

Punti di forza

  • Fits Raspberry Pi and Jetson Nano via 40PIN GPIO header
  • Converts SPI to RS485 at up to 921600bps using SC16IS752+SP3485 chips
  • DIP switch selects manual or automatic transceiver modes
  • TVS suppressor plus auto-recovery fuse protect against surges and over-current
  • Onboard LEDs show power and data-transceiver status

Caratteristiche tecniche

BrandLORDWORLD

Domande su questo articolo

Does the HAT ship with a Raspberry Pi or Jetson Nano, or must I buy the host board separately?

The board is an expansion HAT only; a Raspberry Pi series board or Jetson Nano must be purchased separately to use it.

The data sheet lists a maximum rate of 921600bps — when should I choose that speed versus a lower setting?

Use 921600bps for short, low-noise cable runs where the host can sustain the throughput; drop to a lower baud rate if cables are long or the environment is electrically noisy.

How does the SC16IS752 plus SP3485 combination affect real-world RS485 reliability on a Pi?

The SPI-to-UART bridge and RS485 transceiver handle conversion in hardware, while onboard TVS, auto-recovery fuse and protection diodes suppress surges and over-current events, giving stable communication in industrial settings.

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