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Grey ABS rail-mount enclosure with eight relays and Ethernet PoE port

WaveShare

WaveShare 8-CH Ethernet Relay Module Modbus RTU TCP PoE ABS rail-mount

SKU CH-490D-RF6RD

Industrial 8-channel Ethernet relay module with Modbus RTU/TCP, MQTT and PoE, 10 A 250 VAC contacts in ABS rail-mount case

  • Control eight circuits over Ethernet with Modbus RTU/TCP protocols
  • Power via PoE or 7–36 V DC with IEEE 802.3 af compliance
  • Switch loads up to 10 A at 250 V AC or 30 V DC
  • Optocoupler isolation and reverse-proof design protect against interference and wiring errors
  • ABS DIN-rail enclosure with LED status indicators for industrial mounting

Industrial Ethernet relay module

The WaveShare 8-CH Ethernet Relay Module provides eight independently controlled channels over a wired network link. It communicates using Modbus RTU and Modbus TCP protocols and accepts power from a PoE port compliant with IEEE 802.3 af or a wide-range DC input of 7 to 36 volts. An ABS rail-mount enclosure suits DIN-rail installations in control cabinets.

Replaces basic wired relay boards

Unlike simple relay boards that require direct GPIO or serial wiring, this module moves switching onto the Ethernet backbone, allowing remote operation from SCADA, PLC or custom software. The jump is worthwhile when you need centralized control, MQTT integration or web-browser configuration across an existing network infrastructure without running extra low-voltage cables to every load.

Handles 10 A at 250 VAC or 30 VDC per channel

Each onboard relay is rated for 10 A at 250 VAC or 30 VDC, letting it switch mains appliances or lower-voltage industrial loads directly. Optocoupler isolation and reverse-polarity protection guard the control side from transients on the load side. The module runs out of headroom when load current exceeds the contact rating or when the application demands more than eight switched circuits.

Highlights

  • Control eight circuits over Ethernet with Modbus RTU/TCP protocols
  • Power via PoE or 7–36 V DC with IEEE 802.3 af compliance
  • Switch loads up to 10 A at 250 V AC or 30 V DC
  • Optocoupler isolation and reverse-proof design protect against interference and wiring errors
  • ABS DIN-rail enclosure with LED status indicators for industrial mounting

Specifications

No published specifications for this item yet.

Questions about this item

What rail type fits the ABS case for cabinet mounting?

The module ships in an ABS rail-mount case designed for standard DIN rail installation inside control cabinets.

In which order should I connect PoE and the screw-terminal supply to avoid a wiring error?

Choose one power source only — either the IEEE 802.3 af PoE port or the DC 7-36 V screw terminals — and wire the screw terminals with correct polarity before applying voltage.

When should I plan to replace the onboard relays under a 10 A 250 VAC load?

The relays are rated for 10 A at 250 VAC or 30 VDC; replace them when contact resistance rises or switching becomes unreliable after extended use at rated current.

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