DollaTek 5V 1-Channel Relay Module with Optocoupler User Manual

Introduction

This manual provides detailed instructions for the DollaTek 5V 1-Channel Relay Module. This module is designed for controlling various electrical devices with a low-voltage signal, featuring optocoupler isolation for stable performance and support for both high and low-level triggers. It is suitable for a wide range of applications in electronics and automation.

The module utilizes a genuine quality relay with normally open (NO) and normally closed (NC) interfaces, capable of handling a maximum load of AC 250V/10A or DC 30V/10A. Its fail-safe design ensures that the relay will not operate unintentionally even if the control line is broken.

Product Overview

The DollaTek 5V 1-Channel Relay Module is a compact and reliable solution for switching higher voltage/current loads using a 5V control signal. It features clear labeling for easy connection and a jumper for selecting trigger logic.

Figure 1: Top view of the DollaTek 5V 1-Channel Relay Module. This image displays the DC+ (power positive), DC- (power negative), IN (control signal input), NO (normally open), COM (common), and NC (normally closed) terminals, along with the high/low level trigger selection jumper.

Setup Instructions

Follow these steps to set up your DollaTek 5V 1-Channel Relay Module:

1. Identify Terminals

Locate the following terminals on the module:

• DC+: Positive power supply input (5V).
• DC-: Negative power supply input (Ground).
• IN: Control signal input.
• NO: Normally Open relay contact.
• COM: Common relay contact.
• NC: Normally Closed relay contact.

Figure 2: Angled view highlighting the power supply and signal triggering end, relay output control terminals, and the high/low level trigger select jumper.

2. Power Supply Connection

Connect a 5V DC power supply to the module:

• Connect the positive (+) terminal of your 5V power supply to the DC+ terminal on the module.
• Connect the negative (-) terminal (Ground) of your 5V power supply to the DC- terminal on the module.

Ensure the power supply voltage is stable at 5V to prevent damage to the module.

3. Trigger Level Selection

The module supports both high and low-level triggers. Select the desired trigger mode using the jumper cap:

• To set for a Low-Level Trigger: Place the jumper cap on the pins labeled LOW. In this mode, the relay activates when the IN terminal receives a low-level signal (e.g., 0V or Ground).
• To set for a High-Level Trigger: Place the jumper cap on the pins labeled HIGH. In this mode, the relay activates when the IN terminal receives a high-level signal (e.g., 5V).

Refer to Figure 1 for the location of the trigger selection jumper.

4. Control Signal Connection

Connect your control signal source (e.g., microcontroller GPIO pin) to the IN terminal of the module. The signal level (high or low) should correspond to the trigger level selected in the previous step.

5. Load Connection

Connect the device you wish to control to the relay output terminals (NO, COM, NC). The relay acts as a switch for your load circuit.

• Normally Open (NO): The circuit between COM and NO is open (disconnected) when the relay is de-energized and closes (connected) when the relay is energized.
• Normally Closed (NC): The circuit between COM and NC is closed (connected) when the relay is de-energized and opens (disconnected) when the relay is energized.
• Common (COM): This is the common terminal for both NO and NC connections.

Always ensure the load's voltage and current do not exceed the relay's maximum ratings (AC 250V/10A, DC 30V/10A).

Operating Instructions

Once the module is set up, operating it is straightforward:

1. Apply Power: Ensure the 5V DC power supply is connected to DC+ and DC-. The power indicator LED (PWR) on the module should illuminate.
2. Control Signal: Apply the appropriate control signal (high or low, depending on your jumper setting) to the IN terminal.
   • If set to Low-Level Trigger: Applying a low signal (e.g., 0V) to IN will energize the relay. Removing the low signal (e.g., applying 5V or floating) will de-energize it.
   • If set to High-Level Trigger: Applying a high signal (e.g., 5V) to IN will energize the relay. Removing the high signal (e.g., applying 0V or floating) will de-energize it.
3. Relay Action: When the relay is energized, you will hear a distinct click, and the status LED (LED1) will illuminate. The COM terminal will connect to NO and disconnect from NC. When de-energized, COM will disconnect from NO and connect to NC.

The optocoupler isolation ensures that the control circuit is electrically separated from the relay coil, providing protection for your control device.

Maintenance

The DollaTek 5V 1-Channel Relay Module is designed for reliable operation with minimal maintenance. To ensure longevity and optimal performance:

• Keep Clean and Dry: Avoid exposing the module to dust, dirt, moisture, or corrosive environments. Clean gently with a dry, soft cloth if necessary.
• Inspect Connections: Periodically check all wiring connections to ensure they are secure and free from corrosion or damage.
• Avoid Overloading: Do not exceed the specified maximum current and voltage ratings for the relay contacts. Consistent overloading can lead to premature failure.
• Temperature: Operate the module within its specified operating temperature range.

Troubleshooting

If you encounter issues with your relay module, refer to the following troubleshooting guide:

Relay Not Activating

• No Power: Verify that the 5V DC power supply is correctly connected to DC+ and DC- and is providing stable 5V. Check if the PWR LED is illuminated.
• Incorrect Trigger Signal: Ensure the control signal applied to the IN terminal matches the selected trigger level (high or low) set by the jumper.
• Jumper Setting: Confirm the jumper cap is correctly placed on either the HIGH or LOW pins according to your desired trigger logic.
• Faulty Control Signal Source: Test your control signal source (e.g., microcontroller) to ensure it is outputting the correct signal.

Relay Activates but Load Does Not Switch

• Incorrect Load Wiring: Double-check the connections between your load and the NO, COM, NC terminals. Ensure the load circuit is complete.
• Overloaded Relay: Verify that the load's current and voltage requirements do not exceed the relay's maximum ratings (AC 250V/10A, DC 30V/10A).
• Faulty Load: Test the load device independently to ensure it is functioning correctly.
• Damaged Relay Contacts: If the relay has been subjected to repeated overloading or high inrush currents, the contacts may be damaged.

Intermittent Operation

• Loose Connections: Check all wiring for loose connections, which can cause intermittent contact.
• Noise Interference: In noisy electrical environments, ensure proper shielding and grounding. The optocoupler provides some isolation, but strong interference can still affect the control signal.
• Unstable Power Supply: Ensure the 5V power supply is stable and free from voltage fluctuations.

Specifications

Warranty Information

DollaTek products are typically covered by a standard manufacturer's warranty against defects in materials and workmanship. Specific warranty terms and duration may vary based on your region and point of purchase. Please retain your proof of purchase for any warranty claims. For detailed warranty information, refer to the documentation provided with your purchase or contact your retailer.

Customer Support

For technical assistance, troubleshooting, or general inquiries regarding your DollaTek 5V 1-Channel Relay Module, please contact your retailer or visit the official DollaTek support channels. When contacting support, please have your product model number (SRD-05VDC-SL-C) and purchase information ready.

You can often find additional resources, FAQs, and community forums online by searching for "DollaTek SRD-05VDC-SL-C support" or "DollaTek relay module documentation".