Waveshare
Modbus RTU 8-Channel Relay Module – 30A, RS485, DIN Rail Mount
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$77.25
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Robust Industrial 8-Channel Relay Module - Modbus RTU (E) with High-Current RS485 InterfaceUnlock unparalleled control within demanding industrial environmen...
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Robust Industrial 8-Channel Relay Module - Modbus RTU (E) with High-Current RS485 Interface
Unlock unparalleled control within demanding industrial environments with our Modbus RTU 8-channel Relay Module (E). Meticulously engineered to facilitate superior handling of high current applications, this module is the epitome of reliability and robust performance, featuring a seamless RS485 interface with Modbus RTU protocol for precise communication.
Key Features at a Glance:
- Dependable Operation: Optimized for ongoing industrial use with 8 channels, this relay module is capable of enduring up to 30A of high current, ensuring your operations run smoothly without any interruptions.
- Advanced Safety Mechanisms: Multi-isolation protection circuits, including onboard optocoupler isolation and built-in flyback diode protection, safeguard your system against voltage spikes, while resettable fuses prevent over-current incidents.
- Effortless Mounting: Housed within a rail-mounted, durable ABS plastic enclosure, installation is a hassle-free process, offering both convenience and safety within your electrical setup.
- Wide Voltage Compatibility: The onboard voltage regulator supports a generous range of 7V to 36V, ensuring the relay module remains versatile and functional across various power supply scenarios.
- Intelligent Design Features: Easily programmable device addresses (1-255) allow for cascading multiple devices on the RS485 bus. Flash-on and flash-off functions grant you the power to activate relays temporarily - an attribute that significantly enhances your control strategy.
- User-Friendly Indicators: Equipped with 3 LED indicators to display the MCU and signal transmission statuses, you'll have immediate feedback on your system's operations at a glance.
Specifications:
- Power Supply: 7-36V
- Communication Interface: RS485
- Baud Rates: 4800 to 256000
- Default Communication Format: 9600, N, 8, 1
- Relay Channels: 8
- Contact Form: 1NO 1NC
- Contact Rating: ≤30A at 250V AC or ≤30A at 28V DC
- Communication Protocol: Standard Modbus RTU
- LED Indicators: STA, TXD, RXD
- High Current Screw Terminals with Covers
- Weight: 0.534 kg
- Dimensions: 200×110×60mm
Industrial Applications:
Perfect for an array of industrial applications, from automation systems to process control, this relay module offers a trusted solution. It ensures that energy management, machinery operation, and complex automated systems retain optimal functionality with incomparable ease.
Convenient Resources & Services:
Discover comprehensive resources and a supportive wiki guide at www.waveshare.com/wiki/ModbusRTURelay_(E) to help with easy integration and setup for this module.
Please Note:
- Power supply is not included; we recommend a 12V supply for your convenience.
- We also suggest purchasing USB TO RS232/485/TTL or USB TO RS485 for straightforward testing and implementation.
The Modbus RTU 8-channel Relay Module (E) is not just a component; it's a cornerstone for sustainable, reliable, and safe industrial automation. Advance your system's capabilities with this high-current, isolating powerhouse, designed for peak performance and steadfast operation. Add it to your setup today and witness the transformation in your control processes.
Jargon buster
Plain-language definitions for the technical terms used above.
- baud
- Baud is the signalling rate of a serial connection, often used as the speed setting for UART communication. Matching the baud rate matters because both connected devices must use the same setting for readable data.
- DC
- DC means direct current, where electricity flows in one constant direction, as supplied by batteries, USB ports and many plug-pack power supplies. When a product specifies DC, it runs from a DC supply rather than mains AC, so you need to provide the correct voltage and polarity.
- LED
- A light-emitting diode (LED) is a small electronic component that emits light when current flows through it in the correct direction. Because it only conducts one way, its polarity matters, and a through-hole LED must be soldered the correct way around to light up.
- Modbus
- Modbus is an industrial communication protocol used by many meters, sensors, PLCs and automation devices. When a product lists Modbus support, it is generally easier to integrate with existing industrial equipment that speaks the same protocol.
- Modbus RTU
- Modbus RTU is a version of the Modbus protocol that runs over serial wiring, commonly RS485. When a product lists Modbus RTU, it can connect to industrial sensors, meters or drives that use serial Modbus rather than Ethernet.
- Relay module
- A relay module uses an electrically controlled switch to let a low-power microcontroller control a separate circuit. It matters when switching devices that need different voltages or more current than a microcontroller pin can safely handle.
- RS485
- RS485 is a robust differential serial communication standard often used in factories, farms and buildings where cables may be long or electrically noisy, and it can link many devices on a single pair of wires. When a product lists RS485, it can communicate with industrial sensors, meters and control equipment over longer distances than typical hobby serial wiring.
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