4-channel relay module 5V/12V/24V, optocoupler relay module board with high and low trigger for Arduino (5V)

Fault-Tolerant Design: This 4-channel relay module features a fault-tolerant design; even if the control line is broken, the relay will not be activated. It includes a power indicator (green) and a 4-position relay status indicator (red).

Humanized Interface Design: This 4-channel relay module's user-friendly interface allows for direct connection of all interfaces via the terminal cable, which is very convenient. Four mounting holes are provided. It features a standard interface that can be directly controlled by a microcontroller (Arduino, Raspberry Pi, 8051, AVR, PIC, DSP, ARM, MSP430, TTL logic).

Stable Performance: The relay board uses optocoupler isolation, providing strong driving capability and stable performance. The triggering current is 5 mA.

The module can be set high or low using a jumper trigger. The module uses a genuine, high-quality relay with normally open interfaces. The operating voltage of the relay module is 5V, 12V, or 24V. Each channel of the module can be triggered by a high or low level via a jumper. Each channel of the module can be triggered by a high or low level via a jumper.

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Features: Adopts separate optocoupler isolation, strong driving capability, stable performance. The triggering current is 5mA. The module's operating voltage is 5V, 12V, and 24V.

Each channel of the module can be triggered by a high or low level via a jumper.

Specification: Weight: 60g / 2.1oz Common interface load: AC 250V / 10A, DC 30V / 10A Module size (L * W * H): 73 * 50 * 18.5mm / 2.9 * 2 * 0.7inch Bolt hole: 3.1mm; 67 * 44.5mm (spacing) Voltage: 5V, 12V, 24V (optional)

Module interface: 1. DC+: Connect to the positive terminal of the power supply (a voltage is required for the relay; 5V, 12V, and 24V are available) 2. DC-: Connect to the negative terminal of the power supply. 3. IN1-IN4: Depending on the setting of each circuit, the corresponding relay can be controlled with a high or low level for suction.

Relay output terminal: With 12 interface lines, all interfaces can be directly connected to the cable, convenient for users. 1. NO1 - NO4: The relay normally opens the interface and is suspended before being suctioned and is connected to COM after suction. 2. Common interface of the relay COM1 - COM4. 3. NC1 - NC4: Normally closed relay interface. The relay is briefly connected to COM before being suctioned and suspended once suctioned.

High and low trigger selection terminal: 1. S1-S4 is the high-low level trigger selection of relay 1-4 channels successively; 2. Connect COM and short-short, the corresponding relay for the low-level trigger, connect COM and high-short for the high-level trigger.

Package list: 1 x 4-channel relay module