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PC-Controlled 8-Relay Board with USB Interface
The 8 Channel Relay Module USB RLY 16 16Amp is made for projects and systems that want relay control from a computer over USB. It offers eight volt-free relay outputs and a separate 12V supply input for the relay power side.
This makes it useful for industrial benches, automation PCs, kiosk control, lab setups, and custom software-driven switching systems.
Important: The processor side is powered and instructed from USB, while the relay side needs a separate 12V DC adaptor.
Why you'll like it
- USB control interface: Easy PC integration
- Eight outputs: Good for multi-device switching
- 16A relay rating: Better for heavier loads
- Volt-free contacts: Flexible load-side wiring
- Screw terminals: Easier field wiring and maintenance
What you can build
Use it for software-driven switching, test rigs, kiosk hardware, small industrial systems, remote equipment control, and other multi-output PC-based projects.
Starter bundles
Pair it with a computer or mini PC, a 12V DC adaptor, and the correct application software or scripts for USB control.
Recommended add-ons
Useful add-ons include terminal block, breadboard, power modules, fuses, and enclosure, especially when you are working with higher voltages or inductive loads.
Technical specifications
| Product | 8 Channel Relay Module USB RLY 16 16Amp |
|---|---|
| Relay count | 8 |
| Control interface | USB |
| Relay power | 12V DC adaptor, supplied separately |
| Relay current | Up to 16A @ 24VDC or 250VAC |
| Relay contact style | NO / NC / Common on screw terminals |
| Operating temperature | -40°C to +70°C |
Pinout & power notes
Connect the relay board to USB for control, power the relay section from a proper 12V DC adaptor, then wire each load to the screw terminals. Check software setup before connecting real loads.
What’s in the box
1 × USB-RLY16 board
Frequently Asked Questions
Can USB alone power the relay outputs?
No. The listing states that the relay side uses a separate 12V adaptor.
No. The listing states that the relay side uses a separate 12V adaptor.
Are the relay contacts isolated from USB?
They are volt-free relay outputs, which makes load-side wiring flexible.
They are volt-free relay outputs, which makes load-side wiring flexible.
Is this good for PC-based automation?
Yes. USB control is the main advantage of this board.
Yes. USB control is the main advantage of this board.
Manila stock. Order before 16:00 PHT, ships today via J&T or LBC. Provincial: 1–3 working days.
Schools / class POs: we accept Purchase Orders for accredited schools and universities. contact us with your PO details.
Returns: 7-day inspection window for DOA units. Email proof of issue and we ship a replacement.
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