How to Use a a ON / OFF Infinite Loop Relay

This relay module automates on/off switching of electrical devices with adjustable delay times. It supports single-delay (ON/OFF) and cyclic delay modes, making it ideal for applications like pumps, lights, and test systems.

Features

• Voltage Input: Depending on version used. You can find links to each below;
  • DC 5V ON OFF Infinite Loop Relay
  • DC 12V ON OFF Infinite Loop Relay
  • DC 24V ON OFF Infinite Loop Relay 

• Compatible with DC 5V, 12V, or 24V.
• Adjustable Time Delays: Control ON and OFF durations.
• Two Selectable Modes; Once Mode & Cycle Mode
• Time Range Settings:
  • J4 (OP1): 1 to 100 seconds (finer tuning with 0.1-second accuracy).
  • J4 (OP2): 1 second to 15 minutes (less precise tuning with 1-second accuracy).
  • J5 (OP3): Enables Once Mode (relay activates once per cycle).
  • J5 (OP4): Enables Cycle Mode (relay continuously switches ON/OFF).
• T1: Adjusts the ON duration (how long the relay stays active).
• T2: Adjusts the OFF duration (how long the relay remains inactive).
• External Trigger Connector: Allows manual or external triggering to turn the relay on/off.
• Power Input Connector: Provides DC input for module operation.

Key Components

• Power Input Terminals: Connect your DC supply (5V, 12V, or 24V).
• Relay Output Terminals: Connect the device you want to control.
• J4 Jumpers (OP1 & OP2): Set the time range for delays.
• J5 Jumpers (OP3 & OP4): Select operational modes.
• T1 & T2 Adjusters: Set ON and OFF durations.
• External Trigger Connector: Enables relay control via external input.
• DC Input Connector: Supplies power to the module.

Step-by-Step Setup

Step 1: Connect Power

• Identify the Power Input Connector.
• Connect the positive lead to VCC and the negative lead to GND.

Step 2: Connect Output Device

• Identify the Relay Output Terminals.
• Connect your load (e.g., light, pump) to COM and NO (Normally Open) or NC (Normally Closed) terminals.
• NO terminal: Device is off by default, activates when the relay turns on.
• NC terminal: Device is on by default, deactivates when the relay turns off.

Step 3: Configure Operational Mode (J5)

• Once Mode (OP3):
• The relay turns ON when triggered, remains on for T1, then turns OFF.
• If triggered again during the delay, it resets the process.
• Cycle Mode (OP4):
• The relay alternates between ON (T1) and OFF (T2) continuously.
• If triggered during the delay, the cycle resets.

Step 4: Adjust Timing (J4 & T1/T2)

• J4 (OP1 & OP2):
• OP1: Adjusts 1 to 100 seconds (finer tuning).
• OP2: Adjusts 1 second to 15 minutes (less precise).
• T1: Adjusts ON duration.
• T2: Adjusts OFF duration.

Step 5: Use the Trigger Connector

• One of the white connectors at the module’s end serves as the manual/external trigger, allowing control over relay activation.
• The other white connector is for DC input.

Applications

• Timer Control for Equipment: Automate power-off after a set time.
• Repetitive Testing Circuits: Switch devices on/off at intervals.
• Aquarium Pumps: Create intermittent oxygenation cycles.
• General Automation: Suitable for precise power cycling.

Conclusion

This module offers easy-to-configure, flexible time-based control for various applications. With adjustable delays, mode selection, and external triggering, it’s an efficient solution for automation projects and test circuits.