8-Channel USB Serial Relay Module DC 5V/12V/24V UART RS232 CH340
8-Channel USB Serial Relay Module DC 5V/12V/24V UART RS232 CH340
8-Channel USB Serial Port Relay Module — Versatile 2-in-1 Switch Board
Take full control of your automation projects with this powerful 8-Channel USB Serial Relay Module. Supporting DC 5V, 12V, and 24V operating voltages, this multifunction switch board features dual interface connectivity (USB-B via CH340 chip and RS232/TTL), making it an ideal solution for engineers, hobbyists, and integrators working on smart home, industrial control, and automation systems. Made in Mainland China.
Key Specifications
- Working Voltage: DC 5V / 12V / 24V (selectable)
- Channels: 8-channel relay output
- Interfaces: USB-B (CH340 chip) & RS232/TTL serial port
- Protocol: UART serial port — supports AT commands and 8-byte commands (auto-recognized, no manual switching required)
- OS Compatibility: Windows, Linux, and macOS
- Maximum Load per Relay: 10A/250VAC | 10A/125VAC | 10A/30VDC | 10A/28VDC | 10A/12VDC
- Standby Current (DC 12V, all relays closed): 12mA; each additional relay open adds ~27mA
- Delay Command: Up to 9,999 seconds (AT command only)
- Dimensions: 90 × 62 × 19.5 mm
- Weight: 115g
8 Control Modes
- Open | Close | Momentary | Self-Locking | Interlock | Delay | All Relays Open | All Relays Close
Wide Range of Applications
- Smart Home & Home Automation
- Remote Control & Remote Measurement Systems
- Access Control & Identification Systems
- Motor, LED, PTZ Camera, PLC, and IPC Control
- Data Collection & Wireless Metering
- Baby Monitoring Systems
- Intelligent & IT Household Appliances
What's in the Box
- 1× 8-Channel USB Serial Relay Module
- 1× USB Cable
Important Notes
Due to lighting and screen differences, the item's color may appear slightly different from product images. Please allow ±1–3 cm variation due to manual measurement.
For guidelines on safe electrical component use and best practices, refer to the U.S. Consumer Product Safety Commission — Electrical Safety Resource.
Frequently Asked Questions
Q: What voltages does this 8-channel relay module support?
A: This relay module supports DC 5V, 12V, and 24V operating voltages, giving you flexibility to match it to your existing power supply and project requirements.
Q: Does the CH340 USB relay module work with Linux and macOS?
A: Yes! The USB-B interface using the CH340 chip is compatible with Windows, Linux, and macOS operating systems, making it a versatile choice for cross-platform automation projects.
Q: What is the maximum load each relay can handle?
A: Each relay can handle up to 10A at 250VAC, 125VAC, 30VDC, 28VDC, or 12VDC, making it suitable for controlling motors, LED strips, PTZ cameras, PLCs, and other devices within these ratings.
Q: Do I need to manually switch between AT commands and 8-byte commands?
A: No — the board automatically recognizes both AT commands and 8-byte commands, so there is no need to configure or switch between modes manually.
Q: What is the maximum delay time supported by this relay module?
A: Using AT commands, the delay function supports a maximum delay of 9,999 seconds, providing extensive flexibility for timed automation tasks.