Wiznet makers

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

Contents

• Product body x 1

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Port description and pin assignment

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. BOOTSELWhile 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 BOOLSELwhile RESETholding down the button, then BOOTSELrelease 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

examplesSample code is available in the folder 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

Case bottom dimensions

3D CAD data for the board

STEP file: 3d_step.zip