---
title: "RP2040 Ethernet+PoE General-purpose IO Module"
url: "https://maker.wiznet.io/gavinchang/resellers/rp2040-ethernet-poe-general-purpose-io-module/"
markdown_url: "https://maker.wiznet.io/gavinchang/resellers/rp2040-ethernet-poe-general-purpose-io-module/md"
type: "VAR: Value-Added Reseller Products"
author: "y2kb"
author_url: "https://products.y2kb.com/rp-eth-io-2040/v1/"
editor: "WIZnet"
editor_url: "https://maker.wiznet.io/"
original_author: "y2kb"
original_url: "https://products.y2kb.com/rp-eth-io-2040/v1/"
published: "2024-06-27"
language: "en"
hardware: ["WIZnet W5500"]
likes: 0
views: 803
comments: 0
source: "WIZnet Makers (https://maker.wiznet.io/)"
---

# RP2040 Ethernet+PoE General-purpose IO Module

> This is a general-purpose RP2040 module with PoE-compatible Ethernet and various I/O interfaces.supports various power supplies such as PoE/USB/DC9 to 27V.

Original author: y2kb (source: https://products.y2kb.com/rp-eth-io-2040/v1/)

## Components

- **WIZnet W5500** x 1 ([docs](https://docs.wiznet.io/Product/Chip/Ethernet/W5500))

WIZnet parts: W5500 ([Datasheet](https://docs.wiznet.io/Product/Chip/Ethernet/W5500/datasheet?utm_source=maker&utm_medium=project&utm_campaign=w5500), [product hub](https://maker.wiznet.io/products/w5500/))

## Article

![](https://maker.wiznet.io/upload/ckeditor5/473878637%5F1719489292%2Ejpg)

This is a general-purpose RP2040 module with PoE-compatible Ethernet and various I/O interfaces. It is equipped with
photocoupler isolated NPN I/O, -10V to +10V/4mA to 20mA analog input, I2C compatible Grove compatible connector, RS-485 interface, etc., and supports various power supplies such as PoE/USB/DC9 to 27V. It is
also housed in a case that can be fixed by DIN rail or screw fastening, making it easy to install.
Users can freely program it according to their application.

### Features

- Supports various power sources such as PoE/USB/DC9-27V

- 4 x photocoupler isolated inputs (supports current sinking outputs)

- 4 x Photocoupler isolated open collector outputs (supports current sink type)

- Supports 4 x -10V to +10V / 4mA to 20mA analog inputs (selectable per channel)

- High input impedance analog voltage input

- Equipped with Grove compatible connector for I2C

- Equipped with RS-485 serial interface

- Equipped with Raspberry Pi RP2040 (dual core, maximum clock 133MHz, 264kB SRAM)

- Equipped with 16MB of on-board flash memory

- Equipped with EEPROM (2Kbits, including 1Kbits of user writable area) with 48-bit MAC address written

- Equipped with I2C, UART and IO ports

- The signal voltage of Grove/UART/IO can be switched between 3.3V/5V

- Supports both DIN rail and screw mounting

### Names of each part

[![](https://products.y2kb.com/img/rp-eth-io-2040/v1/overview.jpg)](https://products.y2kb.com/img/rp-eth-io-2040/v1/overview.jpg)

### Contents

- Product body x 1

### sale

[Sales page (Switch Science)](https://www.switch-science.com/products/9366/)
*We may have additional stock in addition to the stock displayed on the sales page. For bulk orders or inquiries regarding stock, please contact us here .

### Port description and pin assignment

| interface | Signal name( `基板シルク`) | explanation | RP2040 GPIO pin numbers | RP2040 Features |
| --- | --- | --- | --- | --- |
| Terminal Blocks | `+VCOM` | Insulated input/output positive common | - | - |
| `-VCOM` | Negative common for isolated output | - | - |  |
| `NO0` | Isolated NPN output CH0 | 14 | GPIO_Output |  |
| `NO1` | Isolated NPN output CH1 | 15 | GPIO_Output |  |
| `NO2` | Isolated NPN output CH2 | 16 | GPIO_Output |  |
| `NO3` | Isolated NPN output CH3 | 17 | GPIO_Output |  |
| `NI0` | Isolated NPN input CH0 | 18 | GPIO_Input |  |
| `NI1` | Isolated NPN input CH1 | 19 | GPIO_Input |  |
| `NI2` | Isolated NPN input CH2 | 20 | GPIO_Input |  |
| `NI3` | Isolated NPN input CH3 | twenty one | GPIO_Input |  |
| `485A` | RS-485 signal: A | 0 | UART0_TX |  |
| `485B` | RS-485 signal: B | 1 | UART0_RX |  |
| `AN0` | Analog Input CH0 | 26 | ADC0 |  |
| `AN1` | Analog Input CH1 | 27 | ADC1 |  |
| `AN2` | Analog Input CH2 | 28 | ADC2 |  |
| `AN3` | Analog Input CH3 | 29 | ADC3 |  |
| `IO0` | General purpose input/output CH0 | Ten | GPIO |  |
| `IO1` | General-purpose input/output CH1 | 11 | GPIO |  |
| `IO2` | General-purpose input/output CH2 | 12 | GPIO |  |
| `IO3` | General purpose input/output CH3 | 13 | GPIO |  |
| `TX` | UART TX (connected to RS-485 transceiver) | 0 | UART0_TX |  |
| `RX` | UART RX (connected to RS-485 transceiver) | 1 | UART0_RX |  |
| `SDA` | I2C SDA (connected to Grove's SDA) | 8 | I2C0_SDA |  |
| `SCL` | I2C SCL (continuous with Grove's SCL ) | 9 | I2C0_SCL |  |
| `GND` | - | - | - |  |
| `3.3V` | 3.3V power output | - | - |  |
| `GND` | - | - | - |  |
| `5V` | 5V power output | - | - |  |
| `Vin` | External power input pin (DC9 to 27V) | - | - |  |
| `GND` | - | - | - |  |
| Grove | SDA | I2C SDA​ | 8 | I2C0_SDA |
| SCL | I2C SCL​ | 9 | I2C0_SCL |  |
| button | `RESET` | RP2040 Reset Button | - | RUN |
| `BOOTSEL` | Boot mode selection button | - | - |  |
| USB | D+ | USB D+ | - | USB_DP |
| D- | USB D- | - | USB_DM |  |
| Ethernet | SCK | W5500 SCK | 2 | SPI0_SCK |
| MOSI | MOSI of W5500 | 3 | SPI0_TX |  |
| MISO | W5500 MISO | Four | SPI0_RX |  |
| CS | W5500 CS | Five | SPI0_CS |  |
| RSTn | W5500 reset pin | 6 | GPIO_Output |  |
| LED | `Status` | User LED | twenty five | GPIO_Output |
| Internal Pin | RS485_CTRL | RS-485 Transceiver Direction Control Pin | 7 | GPIO_Output |
| IO_EN | Level Shifter Enable | twenty two | GPIO_Output |  |

### specification

- Isolated Input
  - Number of channels: 4ch
  - Input circuit: Photocoupler isolated input (supports current sink output)
  - Input voltage range: +4V to +30V
  - Input resistance: 10kΩ

- Isolated Output
  - Number of channels: 4ch
  - Output circuit: Photocoupler isolated open collector output
  - Output voltage range: +4V to +30V
  - Maximum output current: 100mA

- Analog Input
  - Number of channels: 4ch
  - Resolution: Maximum 12bit
  - Sampling rate: up to 500ksps
  - Input method: Voltage / Current (selectable for each channel with DIP switch)
  - Voltage Mode
    - Input voltage range: -10V to +10V
    - Input impedance: 1MΩ (typ.)
  - Current Mode
    - Input current range: -25mA to +25mA
    - Input impedance: 250Ω (typ.)

- Digital Input/Output
  - Number of channels: 4ch
  - Input voltage range: 0V to 3.3V

- RS-485
  - Number of ports: 1 port
  - Interface: Terminal block
  - Communication method: Half-duplex multi-drop method, manual TX/RX control
  - Baud rate: 1200bps to 115200bps
  - Terminal resistance: None
  - Data bits, parity, stop bits: User programmable

- UART
  - Number of ports: 1 port
  - Interface: Terminal block
  - Continuity between the TX and RX pins of the RS-485 transceiver IC

- I2C​​
  - Number of ports: 1 port
  - Interface: Grove, terminal block
  - Communication speed: Maximum 1000kbps
  - Pull-up resistor: 10kΩ (typ.)
  - Output voltage: 3.3V, 5V (switchable by slide switch)

- Ethernet
  - Number of ports: 1 port
  - Communication speed: 10BaseT/100BaseTX

- USB
  - Number of ports: 1 port
  - Connector type: USB Type-C
  - Communication standard: USB 1.1

- power supply
  - Input Power
    - Power supply method: PoE / external input pin / USB
    - PoE power class: IEEE802.3af class 3
    - External input pin Operating voltage: 9.0 to 27.0 V
    - USB operating voltage: 4.75 to 5.25 V
    - Power consumption (all I/O pins unconnected): 1.3 W (typ.)
  - Power Output
    - Output voltage: 3.3V, 5V
    - Output voltage accuracy: ±5%
    - Maximum output power (all channels combined): 1.0 W
    - 5V pin Maximum output current: 0.2 A
    - 3.3V pin Maximum output current: 0.2 A

- Processing Unit
  - Microcontroller: Raspberry Pi RP2040 (dual-core Arm Cortex M0+, 133MHz, 264KB SRAM)
  - On-board flash memory capacity: 16MB

- Structure
  - Terminal block: 3.5mm pitch
  - External dimensions: W125 x D108 x H42 mm (typ.)
  - Weight: Approx. 150 g

### How to write a program

#### Things necessary

- Product

- USB Type-C Cable

- PC

#### Program writing procedure

1. If any USB cables, LAN cables, power cables, etc. are connected to the product, unplug them all.

2. Switch to bootloader mode. `BOOTSEL`While holding down the button, insert the USB cable and connect to the PC. Or, while connecting to the PC with a USB cable, press the button `BOOLSEL`while `RESET`holding down the button, then `BOOTSEL`release the button.

3. The RP2040 will be recognized as a flash memory on the PC. Drag and drop the ".uf2" file you built onto the recognized flash memory.

### Sample Code

`examples`Sample code is available in the folder https://gitlab.com/y2kblog/rp-eth-io-sample-codes [.](https://gitlab.com/y2kblog/rp-eth-io-sample-codes)

- `rp_eth_io_tests`: Initialization code for this module and test code for peripherals

### Document

#### circuit diagram

- v1.0: [schematic-v1_0.pdf](https://products.y2kb.com/doc/rp-eth-io-2040/v1/schematic-v1_0.pdf)

#### Case bottom dimensions

![](https://products.y2kb.com/img/rp-eth-io-2040/v1/case_bottom_dimensions.png)

#### 3D CAD data for the board

STEP file: [3d_step.zip](https://products.y2kb.com/doc/rp-eth-io-2040/v1/3d_step.zip)

---

Source: https://maker.wiznet.io/gavinchang/resellers/rp2040-ethernet-poe-general-purpose-io-module/