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RS422 / RS485 Arduino Shield

isolated RS422/RS485 shield for professional use

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Description
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The 2018 Hackaday Prize

Description

I'm working currently on a professional RS422/RS485 shield for the Arduino UNO (and compatible boards) and other SBC with Arduino style headers (like STM Nucleo) . I wasn't satisfied with the shields on the market. They are very simple and have some disadvantages. My shield comes with the following features:

- RS485 mode (half duplex)
- RS422 mode (full duplex)
- galvanic isolation between Arduino and connected RS485 bus
- free choice of TX-pin between pins 0-5
- free choice of RX-pin between pins 0-5
- enhanced ESD protection
- adjustable automatic transceiver switching for RS485 mode
- adjustable control of transceiver/receiver via pin 6 or 7
- adjustable Pull-Up, Pull-Down und terminating resistors
- indicator LEDs for RX and TX
- removable block terminal for bus connection
- many options adjustable via DIP switches
- stackable headers
- can be configured for 3.3V and 5V logic

Details

Files

Arduino_RS485 Shield schematic V01-01-00.pdf Adobe Portable Document Format - 210.13 kB - 08/14/2018 at 08:58		Preview

Datasheet RS485 shield Rev A.pdf Datasheet including Jumper and DIP switch settings Adobe Portable Document Format - 1.86 MB - 08/14/2018 at 08:56		Preview

Project Logs

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Read out an electricity meter via RS485
hwhardsoft • 11/13/2020 at 06:30 • 0 comments

New blog on arduino.cc how to read out an electricity meter via RS485 and Arduino
Tutorial How to Use Industrial Encoders With Arduino
hwhardsoft • 02/06/2020 at 16:27 • 0 comments

A new tutorial is available at Arduino.cc and Instructables.com. How to use industrial encoders with RS422 output with Arduino and our Arduino RS422 shield:
https://www.instructables.com/id/How-to-Use-Industrial-Encoders-With-Arduino/
How to connect to NMEA-0183
hwhardsoft • 01/30/2019 at 09:54 • 0 comments

https://www.instructables.com/id/How-to-Use-NMEA-0183-With-Arduino/
Din rail mount
hwhardsoft • 10/29/2018 at 06:49 • 0 comments

New documentation how to mount this shield into a din rail enclosure:
Instructable: Up to 3 RS485 Busses on One Arduino
hwhardsoft • 09/07/2018 at 08:13 • 0 comments

A new instructable how to add up to 3 RS485 busses on one Arduino is online:
https://www.instructables.com/id/Up-to-3-RS485-Busses-on-One-Arduino/
2 RS485 Shields on one Arduino Board
hwhardsoft • 09/06/2018 at 06:34 • 0 comments

its possible to stack up to 3 RS485 shields to an Arduino (or compatible) board. You can connect the Arduino to 3 independet RS485 busses in this case
RS485 test connection
hwhardsoft • 08/28/2018 at 08:17 • 0 comments

Test run of a RS485 connection of a Raspberry Pi (left position), Arduino 101 and Arduino UNO (right).... This setting can be extended to up to 255 devices and a distance over 1km
our shield on Arduino.CC
hwhardsoft • 08/26/2018 at 07:25 • 0 comments

https://create.arduino.cc/projecthub/hwhardsoft/how-to-use-modbus-with-arduino-6f434b
assembled RS422/RS485 shields are available
hwhardsoft • 08/21/2018 at 11:54 • 0 comments

assembled RS422/RS485 shields for Arduino - fresh from the factory - waiting for new owners

https://www.hwhardsoft.de/english/projects/rs485-arduino/
Instructable "How to use MODBUS with Arduino"
hwhardsoft • 08/19/2018 at 09:27 • 0 comments

Instructable "How to use MODBUS with Arduino" finished

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