8-ch Ethernet Relay Module (B)
Available with a lead time
Expect dispatch between Jan 31 and Feb 03
The 8-channel Ethernet Relay Module (B) is an industrial-grade relay module controlled via Ethernet with 8 digital inputs. It supports Modbus RTU/Modbus TCP protocols, features PoE power supply, and comes in an ABS rail-mount case for easy installation and industrial use.
Features
This product offers robust functionality for industrial control equipment, providing fast communication, stability, and reliability. Key features include:
- Flash-on, flash-off function for timed relay activation.
- Supports DC 7~36V wide-range power input and PoE power supply.
- MQTT protocol relay control with Alibaba Cloud MQTT application demo.
- Optocoupler isolation to prevent high-voltage circuit interference.
- Dedicated relay driver chip with built-in flyback diode protection.
- Passive and active digital input support with bi-directional optocoupler isolation and debouncing algorithm.
- Reverse-proof circuit for accidental connection protection.
- High-quality relay with contact rating: =10A 250VAC/30VDC.
- Rail-mounted ABS plastic enclosure for easy installation and safety.
- LED and network indicators for monitoring MCU status and signal transmission.
Primary Function
The module supports reading digital inputs via Modbus RTU protocol commands sent through Ethernet to control relay outputs.
Communication Modes
The module supports various communication modes:
- TCP Server
- TCP Client
- UDP Mode
- UDP Multicast
- HTTP
- MQTT
It is compatible with Modbus RTU and Modbus TCP protocols.
Configuration Methods
Supports configuration through software or a web browser, with dynamic IP assignment via DHCP and domain name connection through DNS protocol.
Power Supply Options
The module offers multiple power supply options:
- DC power port with plug support.
- Screw terminal for DC 7~36V input.
- PoE port compliant with IEEE 802.3af standards.
*External power supply adapter is not included. A 12V power supply is recommended if needed.
Digital Input
Supports passive (dry contact) and active (wet contact) digital inputs with bi-directional optocoupler isolation.
Interfaces & Indicators
The module includes multiple LED indicators for easy monitoring:
| RUN | Blinks when the Ethernet port is operating normally. |
|---|---|
| STA | Blinks when the MCU is functioning correctly. |
| TXD | Lights up during data transmission. |
| RXD | Lights up during data reception. |
| Ethernet Port Green Indicator | Indicates Ethernet connectivity status. |
Resources
Exact shipping can be calculated on the view cart page (no login required).
Products that weigh more than 0.5 KG may cost more than what's shown (for example, test equipment, machines, >500mL liquids, etc).
We deliver Australia-wide with these options (depends on the final destination - you can get a quote on the view cart page):
- $3+ for Stamped Mail (typically 10+ business days, not tracked, only available on selected small items)
- $7+ for Standard Post (typically 6+ business days, tracked)
- $11+ for Express Post (typically 2+ business days, tracked)
- Pickup - Free! Only available to customers who live in the Newcastle region (must order online and only pickup after we email to notify you the order is ready). Orders placed after 2PM may not be ready until the following business day.
Non-metro addresses in WA, NT, SA & TAS can take 2+ days in addition to the above information.
Some batteries (such as LiPo) can't be shipped by Air. During checkout, Express Post and International Methods will not be an option if you have that type of battery in your shopping cart.
International Orders - the following rates are for New Zealand and will vary for other countries:
- $12+ for Pack and Track (3+ days, tracked)
- $16+ for Express International (2-5 days, tracked)
If you order lots of gear, the postage amount will increase based on the weight of your order.
Our physical address (here's a PDF which includes other key business details):
Unit 18, 132 Garden Grove Parade
Adamstown
NSW, 2289
Australia
Take a look at our customer service page if you have other questions such as "do we do purchase orders" (yes!) or "are prices GST inclusive" (yes they are!). We're here to help - get in touch with us to talk shop.
Have a product question? We're here to help!
Raspberry Pi Zero W (Wireless)SKU: CE04754 Brand: Raspberry PiThe smallest Raspberry Pi just got a whole lot cooler. The Raspberry Pi Zero W c ...- Raspberry Pi OS 32GB Preloaded uSD CardSKU: CE06486 Brand: Raspberry Pi
This 32GB MicroSD Card is preloaded with the Official Raspberry Pi OS. For be ...
- SX1262 LoRa Node Module for Raspberry Pi Pico, LoRaWANSKU: WS-21667 Brand: WaveshareThis is a SX1262 LoRa Node Module For Raspberry Pi Pico with LoRaWAN Support
- MPU-6050 Module 3 Axis Gyroscope + AccelerometerSKU: 018-MPU-6050 Brand: Core ElectronicsA 3-axis gyroscope and 3-axis accelerometer housed on a development board ready ...
Videos
View AllGuides
Getting Started With Relays | Examples with Raspberry Pi Pico
How to use a PiRelay HAT for Raspberry Pi - Multiple Relay Control with Voice or GUI
The Maker Revolution
Relay Operation and the Arduino Uno
Projects
Smart Home Makeover with HomeAssistant
Simple Relay Timer
Makers love reviews as much as you do, please follow this link to review the products you have purchased.
Product Comments