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Home / Development Boards & Control Boards / Juying Relay IO Module Control Board, 4-Channel Serial Isolated 485/Ethernet/WiFi/LoRa, Model DAM0404D
Development Boards & Control Boards

Attributes

Brand -
Category Electronic Components / Maker DIY / Development Boards & Control Boards
Origin -
Communication Protocols RS485, Serial, Wi-Fi, LoRa
Relay Channels 4 Independent Outputs
Input Voltage Range 12V DC to 24V DC
Relay Contact Rating 10A at 250VAC
Signal Isolation Optocoupler Isolated I/O
Operating Temperature -20°C to 70°C
Product Dimensions 100mm x 80mm x 25mm
Net Weight 150g
Mounting Style DIN Rail or Screw Fixing
Firmware Upgrade Supported via Serial Port

5 reviews

A

Anonymous

Apr 14, 2026

Rating: 5/5

Perfect for IoT Gateway

LoRa integration makes this versatile for remote sites.

A

Anonymous

Apr 03, 2026

Rating: 3/5

Wi-Fi range limited

RS485 is great, but Wi-Fi antenna could be stronger.

A

Anonymous

Mar 24, 2026

Rating: 4/5

Good but complex

Works well with Home Assistant but setup took some time.

A

Anonymous

Feb 26, 2026

Rating: 5/5

Reliable RS485

No communication errors in a noisy electrical environment.

A

Anonymous

Feb 23, 2026

Rating: 5/5

Robust Control Module

Used this for a factory automation project. The isolation protects our main controller well.

5 FAQ

Q: Is 5V logic supported?

A: No, the input voltage must be between 12V and 24V DC.

Q: Does it support Modbus RTU?

A: Yes, Modbus RTU is supported over the RS485 interface.

Q: What is the maximum load per relay?

A: Each relay can handle up to 10A resistive load.

Q: Can I control this with Python?

A: Yes, libraries and examples are provided in the documentation.

Q: Does it come with a case?

A: Yes, it includes an industrial-grade enclosure.

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