1-Channel Relay Module - 12V (High and Low Level Trigger)

The 1-Channel Relay Module is a versatile switching module designed to control high-voltage and high-current circuits with a low-voltage microcontroller or other control devices. This module is specifically designed for 12V DC operation and features a single channel, allowing you to control one circuit at a time.

One notable feature of this relay module is the ability to select the trigger level (HIGH or LOW) using a jumper. This flexibility makes it compatible with a wide range of microcontrollers and control devices, as you can configure it to trigger with either a HIGH or LOW input signal.

The relay module typically provides a load capacity of up to 10A at 250VAC or 30VDC, making it suitable for a variety of applications, such as controlling lights, fans, motors, and other electrical appliances.

Additionally, it includes a terminal block for easy connection to external circuits, an LED indicator to display the relay's activation status, and a freewheeling diode to protect against back electromotive force when switching inductive loads.

This relay module is commonly used in automation, robotics, home automation, and various electronic projects where remote or automated control of electrical devices is required.

Key features of 1-Channel Relay Module - 12V (High and Low Level Trigger)

• Trigger level Selection: You can select the trigger level of this module between HIGH and LOW using a jumper. By this flexibility, you can configure it to trigger with either a HIGH or LOW input signal.
• Terminal block: This module includes a terminal block for easy connection to external circuits.
• LED indicator: You can check the relay's activation status a LED on module.

Specifications of 1-Channel Relay Module - 12V (High and Low Level Trigger)

• Type: Relay Module
• Number of Channels: 1 channel
• Operating Voltage: 12V DC
• Working Current: 190mA
• Trigger Current: 3mA ~ 5mA
• Trigger Levels: Selectable trigger level using a jumper (HIGH or LOW)
• Low-Level Trigger Voltage: 0V ~ 1.5V
• High-Level Trigger Voltage: 3V ~ 5V
• Load Capacity: 10A at 250VAC or 30VDC
• Terminal Block: Screw terminal block for easy connection to external circuits
• LED Indicator: Includes an indicator LED to show relay activation status
• Mounting: mounting holes
• Dimensions: 50mm x 26mm x 18.5mm

Usage tips of 1-Channel Relay Module - 12V (High and Low Level Trigger)

• Check Ratings: Ensure that the voltage and current ratings of the relay module match the requirements of your load.
• Use External Power Supply: Use a 12v external power supply to energize the relay module.
• Connect the ground pins of the relay power supply (12V) and the microcontroller board.
• Understand NO and NC Configurations: Understand whether the relay's contacts are normally open (NO) or normally closed (NC) and wire accordingly based on your project requirements.
• Check Input Signal Voltage: Verify the voltage required to activate the relay and ensure compatibility with the control device (3.3/5v are functional).
• Check Polarity: observe polarity of the input to avoid damage during connections.
• If the allowed voltage or current is exceeded, depending on the amount of the exceedance, the relay contacts will be damaged due to the occurrence of arc and will lose their function over time. Look at the image below.
• Exercise caution when working with high-voltage circuits, and ensure proper isolation and protection to prevent electrical hazards. Double-check the wiring and connections before applying power to the relay module.
• Install freewheeling diode to protect against back electromotive force when switching inductive loads.

Pinout of 1-Channel Relay Module - 12V (High and Low Level Trigger)

Inputs:

• DC+: Positive power supply (12V)
• DC-: Connect power and “In signal” negative
• IN: Relay module signal to trigger the end, you can set a high or low level control relay

Relay outputs:

• NO: Normally open relay interface
• COM: Common Interface Relays
• NC: Normally closed relay interface