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Small rectangular box in grey ABS plastic with Ethernet port and screw terminals, DIN-rail mountable

BESIGN

BESIGN 8-CH Relay Module via Ethernet with Digital Input, Modbus RTU/TCP, PoE, DC 7~36V

SKU CH-EV95-SR8M9

Ethernet-controlled 8-channel relay module with digital inputs, Modbus RTU/TCP, PoE and DC 7–36 V power in a rail-mount case

  • 8-channel relay control over Ethernet with Modbus RTU/TCP
  • 8 digital inputs with optocoupler isolation for noise immunity
  • PoE IEEE 802.3af plus DC 7–36 V power flexibility
  • Web browser and software configuration with DHCP/DNS support
  • ABS rail-mount case with relay driver chip and flyback protection

Industrial 8-Channel Ethernet Relay Module

This industrial relay module provides eight independently controlled channels managed through an Ethernet interface. It includes eight digital inputs that accept both passive dry contacts and active wet contacts with bi-directional optocoupler isolation. The unit supports Modbus RTU and Modbus TCP protocols for integration with SCADA, PLC or building-management systems. An ABS rail-mount enclosure allows direct DIN-rail installation in control cabinets.

Sustained Load Behaviour and Protocol Flexibility

The module maintains stable operation under continuous duty by using a dedicated relay driver chip with built-in flyback diode protection and onboard optocoupler isolation that shields logic circuits from high-voltage transients. Multiple communication modes are available including TCP Server, TCP Client, UDP, UDP Multicast, HTTP and MQTT, with an Alibaba Cloud MQTT demo provided. Configuration can be performed through PC software or a web browser, and the device obtains IP addresses via DHCP or resolves hostnames through DNS.

Power Supply Options and Upgrade Path

Three power methods are supported: a DC barrel jack, a screw terminal accepting DC 7~36V wide-range input, and IEEE 802.3af PoE for single-cable deployment. This flexibility replaces older relay boards that require a single fixed-voltage supply and lack network connectivity. The jump is worthwhile when an application needs remote relay control over IP networks, mixed dry and wet digital sensing, or rail-mount installation without adding external power adapters.

Highlights

  • 8-channel relay control over Ethernet with Modbus RTU/TCP
  • 8 digital inputs with optocoupler isolation for noise immunity
  • PoE IEEE 802.3af plus DC 7–36 V power flexibility
  • Web browser and software configuration with DHCP/DNS support
  • ABS rail-mount case with relay driver chip and flyback protection

Specifications

No published specifications for this item yet.

Questions about this item

How much power does the BESIGN 8-CH Relay Module draw when all eight relays stay energised all day?

The module accepts DC 7~36 V or IEEE 802.3af PoE, so total draw depends on the supply voltage you use and the coil current of each relay.

What external items must I already have to operate this relay module?

You need an Ethernet network, a Modbus TCP/RTU client or MQTT broker, and either a 7–36 V DC source or a PoE switch that complies with IEEE 802.3af.

Can I keep my existing Modbus RTU serial devices on the same network as this Ethernet module?

Yes — the unit speaks Modbus TCP over Ethernet and can run as a TCP server, TCP client or UDP endpoint, letting legacy Modbus RTU gear talk through a gateway without protocol changes.

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