12V Eight-Channel USB Relay Controller Board, NC/COM/NO
Bring several switching channels into one PC-controlled bench project. This eight-channel USB relay board uses a separate 12V DC supply and NC/COM/NO screw terminals. It is for experienced electronics users integrating compatible control software and suitably rated circuits.
- ✅ Control several circuits from one board — Eight relay channels share a USB control interface.
- ✅ Choose the contact behaviour for each circuit — NC, COM and NO terminals provide changeover wiring options.
- ✅ Plan the power connection around your enclosure — A DC socket and supply terminal offer two input connection methods.
- ✅ Organise wiring during a bench build — Labelled screw terminals identify the channel connections.
- ✅ Keep a powered setting after unplugging USB — State retention is stated while external power remains connected.
Eight switching channels for a compatible USB project
The USB Type-B interface connects the controller to a suitable computer and software, while the relay board requires separate 12V DC power. Windows XP and Windows 7 are the stated software platforms; compatibility with newer systems and a supplied control application are not confirmed.
Use the individual changeover contacts for circuits within the verified ratings and the limitations of the complete installation. Relay component markings are not a blanket rating for every load or enclosure. The open board needs suitable mounting, insulation and an enclosure; mains work requires appropriate electrical competence.
One controller board is supplied. A power supply, USB cable, enclosure, connected equipment and software licence are not confirmed included. The stated retention of switching state depends on continued external power and should not be treated as a power-loss memory feature.
Eight relays provide separate changeover contact channels.
The open board needs suitable mounting and an enclosure.
Each output is marked NC, COM and NO.
USB Type-B is the computer control connection.
Separate 12V supply connections are provided.
Choose the contact terminals required for your circuit.
Labelled output rows help organise channel wiring.
Check polarity before connecting the external supply.
Technical details
- Product: eight-channel USB relay controller board
- Input supply: 12V DC
- Input current requirement stated: greater than 300 mA
- Computer interface: USB Type-B
- Contacts per channel: NC/COM/NO
- Relay markings stated: 10A at 250V AC or 30V DC; complete-installation limits must be checked
- Stated platforms: Windows XP/7, 32-/64-bit
- Approximate weight: 112 g
- Package: 1 controller board
- Not confirmed included: power supply, USB lead, enclosure or software licence
Plan your supply, software and load connections, then add eight relay channels to your compatible control project.
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