---
title: "DC7-28 V Modbus Rtu modulo inoltro di rete 1 canale controllo LAN Ethernet TCP/IP"
url: "https://maker.wiznet.io/louis_m/projects/dc7-28-v-modbus-rtu-modulo-inoltro-di-rete-1-canale-controllo-lan-ethernet-tcp-ip/"
markdown_url: "https://maker.wiznet.io/louis_m/projects/dc7-28-v-modbus-rtu-modulo-inoltro-di-rete-1-canale-controllo-lan-ethernet-tcp-ip/md"
type: "UCC: User Created Content"
author: "Markenlos"
author_url: "https://www.ebay.it/itm/275548599104?mkevt=1&mkcid=1&mkrid=724-53478-19255-0&campid=5338722076&customid=&toolid=10050&amdata=enc%3AAQAHAAAAkNY79dGrDhalYuPPRA7SaS8%2FW3tMNNEVBooVGeWxkyYRi%2FtC1JuMAWSL7q%2BtsbcATFoC83a%2FcQPSDGhnZdmlwwI6JZcDgPrJVCLPJvThDKs5%2FXroqtByapFP2A0vsOGJy8fddP5Y%2B5M0Xp6gY0yoJ84PSDT8uldti48KRICRsokKzu49un1i%2FhgJh9AHUBKmNA%3D%3D"
editor: "WIZnet"
editor_url: "https://maker.wiznet.io/"
original_author: "Markenlos"
original_url: "https://www.ebay.it/itm/275548599104?mkevt=1&mkcid=1&mkrid=724-53478-19255-0&campid=5338722076&customid=&toolid=10050&amdata=enc%3AAQAHAAAAkNY79dGrDhalYuPPRA7SaS8%2FW3tMNNEVBooVGeWxkyYRi%2FtC1JuMAWSL7q%2BtsbcATFoC83a%2FcQPSDGhnZdmlwwI6JZcDgPrJVCLPJvThDKs5%2FXroqtByapFP2A0vsOGJy8fddP5Y%2B5M0Xp6gY0yoJ84PSDT8uldti48KRICRsokKzu49un1i%2FhgJh9AHUBKmNA%3D%3D"
published: "2022-11-30"
language: "en"
hardware: ["WIZnet W5500"]
likes: 3
views: 1017
comments: 0
source: "WIZnet Makers (https://maker.wiznet.io/)"
---

# DC7-28 V Modbus Rtu modulo inoltro di rete 1 canale controllo LAN Ethernet TCP/IP

> LAN Ethernet TCP/IP

Original author: Markenlos (source: https://www.ebay.it/itm/275548599104?mkevt=1&mkcid=1&mkrid=724-53478-19255-0&campid=5338722076&customid=&toolid=10050&amdata=enc%3AAQAHAAAAkNY79dGrDhalYuPPRA7SaS8%2FW3tMNNEVBooVGeWxkyYRi%2FtC1JuMAWSL7q%2BtsbcATFoC83a%2FcQPSDGhnZdmlwwI6JZcDgPrJVCLPJvThDKs5%2FXroqtByapFP2A0vsOGJy8fddP5Y%2B5M0Xp6gY0yoJ84PSDT8uldti48KRICRsokKzu49un1i%2FhgJh9AHUBKmNA%3D%3D)

## 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

### DC7-28V Modbus Rtu 1Channel Network Relay Module TCP/IP Ethernet LAN Control

Description:

The single-way Modbus network relay module is equipped with a mature and stable 32-bit MCU and W5500 full hardware TCP/IP protocol stack network chip.
MCU debugging interface is reserved to support secondary development.
The standard MODBUSRTU format communication protocol can be used to control one relay output in a local area network, which can be used for power control under wired network.
With input anti-reverse connection protection.
With diode diarrhea protection, short response time;

Parameters:
1. On-board mature and stable 32bit MCU STM32F103C6T6 chip;
2. On-board W5500 full hardware TCP/IP protocol stack Ethernet chip, supporting 10/100M bps rate;
3. Communication protocol: support standard Modbus RTU protocol;
4. Device as TCP Server side, support IP address DHCP function, port number 5000;
5. IP address of module can be viewed through serial port, UART communication baud rate: 115200;
6. Output signal: relay switch signal, support manual, flash off, flash off mode, flash off/flash off delay base is 0.1S, the maximum set flash off/flash off time is 0xFFFF*0.1S=6553.5S;
7. Device address: range 1-255, default 255, support power down save;
8. Relay status, device address can be read using software/instructions;
9. 1 on-board 5V, 10A/250V AC 10A/30V DC relay, can be continuously closed 100,000 times, with diode lagging protection, short response time;
10. On-board power and relay switch indicator;
11. On-board MCU reset button;
12. reserved UART serial port and SWD program burning port, support secondary development;
13. Power supply voltage: DC7-28V, support 5.08mm terminal power supply, with input protection against reverse connection.

Interface introduction:
1. Main control MCU: STM32F103C6T6;
2. Network chip: W5500 full hardware TCP/IP protocol stack Ethernet chip;
3. Network interface: 10M/100Mbps HR911105A network transformer:
4. 5.08mm terminal power supply port: DC7-28V power input, where GND is negative;
5. MCU reset button: short press to reset. 6;
6. MCU SWD debug interface: for secondary development burn-in;
7. MCU UART debug interface: GND, RXD, TXD: TTL level UART
Communication interface, GND, RXD, TXD are connected to the external console GND, TXD, RXD, support the connection of 3.3V/5V external TTL serial port, default for serial view device IP address and port number, baud rate 115200;
8.1 way relay switch signal output:
NC: Normally closed, shorted to COM before the relay is closed, suspended after closed;
COM: Common terminal;
NO:Normally open terminal, the relay is overhung before suction, and shorted to COM after suction.

Product Include.

Single circuit Modbus network relay module x 1
8P single-row pin x 1

---

Source: https://maker.wiznet.io/louis_m/projects/dc7-28-v-modbus-rtu-modulo-inoltro-di-rete-1-canale-controllo-lan-ethernet-tcp-ip/