16-Channel Relay Module – 5V DC 10A (Single-Sided PCB Design)

Scale up your automation capabilities to the absolute maximum with the 16-Channel 5V 10A Relay Module. Precision-engineered by Muonix, this high-density expansion board serves as a massive 16-way isolated power switchboard, allowing low-voltage microcontrollers to safely coordinate and toggle up to sixteen high-current appliances simultaneously from a single master controller.

This variant features a unified Single-Sided (One Side) component layout. By consolidating all 16 relays, optocouplers, status LEDs, and terminal blocks onto a single flat plane, this architecture provides an incredibly neat profile, highly organized wire routing, and a straightforward layout for swift visual troubleshooting. It is the definitive choice for whole-building automation panels, large-scale industrial PLC extensions, and complex multi-load engineering grids.

Key Features

• Massive 16-Channel Control Grid: Command up to 16 separate AC or DC electrical appliances completely independently using digital I/O lines from your microcontroller.

• Streamlined Single-Sided Layout: All terminal blocks, relays, and logic headers are aligned on a single face of the PCB. This keeps the board flat, uniform, and exceptionally easy to mount against back panels or inside standard electrical distribution boxes.

• Full Optocoupler Matrix Isolation: Equipped with a comprehensive array of high-speed optocouplers. By creating a physical light barrier between the logic inputs and the high-voltage rails, your Arduino, ESP32, or Raspberry Pi is 100% safe from back-EMF spikes and inductive surges.

• Dedicated Power Supply Tracing (JD-VCC): Features an independent power input terminal for the relay coils. This allows you to power the relays from an external 5V source while keeping your microcontroller’s power grid completely isolated for maximum noise prevention.

• Independent LED Status Arrays: Built with 16 individual, bright SMD LEDs that illuminate to give you clear, real-time diagnostic visual tracking of exactly which channels are actively closed.

Technical Specifications

Hardware Wiring & Pin Layout

The module features a highly organized layout with control logic headers grouped on one end and high-voltage screw terminals running along the edges:

1. Logic Control Input (Header Pins):

• VCC: Connects to the +5V DC supply rail from your microcontroller logic.

• GND: System ground reference pin.

• IN1 to IN16: Digital input trigger pins. Pulling these lines LOW (or HIGH depending on the specific firmware variant configuration) activates the respective relay channel.

• VCC / JD-VCC Terminal: Remove the jumper cap to supply independent 5V power to the relay coils via JD-VCC, providing absolute electrical isolation.

2. High-Voltage Load Output (3-Way Screw Terminals):

Each of the 16 channels features a dedicated heavy-duty terminal block containing:

• NO (Normally Open): The circuit stays disconnected/open until the input trigger pin commands the relay to close.

• NC (Normally Closed): The circuit stays connected/closed by default until the relay is triggered to open.

• COM (Common Terminal): The central main power wire from your load connects directly here.

Common Applications

• Whole-Building Smart Automation: Create a centralized master switch panel to control lighting grids, ceiling fans, air conditioning contactors, and heavy appliances across multiple rooms or floors.

• Industrial PLC Interfacing: Serves as a rugged, economical multi-channel expansion board to link low-power logic sensors with factory sirens, lights, pneumatic valves, and automated machinery panels.

• Complex Stage Lighting & FX: Choreograph massive multi-tier lighting arrays, smoke machines, and automated props synchronously from a single microcontroller code routine.

Package Includes:

• 1 x 16-Channel Relay Module 5V 10A (One Side Design)