1. Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of the GODIYMODULES FC-31Relay12v-001 DC 12V Delay Relay Switch Module. This module is designed for precise timing control in various DC 12V applications, offering both delay turn-on and delay turn-off functionalities with adjustable time ranges.
2. Product Overview
The FC-31Relay12v-001 is a versatile DC 12V delay relay module featuring a compact design and robust performance. It incorporates a high-quality relay capable of handling significant loads and includes protection against power reversal. The module's timing can be precisely adjusted using an onboard potentiometer and dip switches for range selection.
Key Features:
- Wide Time Range Selection: Offers 8 distinct time ranges, from a minimum of 0.1 seconds up to a maximum of 1 hour.
- Power Reversal Protection: Equipped with a protection diode to safeguard the module from incorrect power polarity.
- High Current Load Capacity: Capable of switching loads up to 250V AC at 10A or 30V DC at 10A.
- Adjustable Delay Time: A clockwise adjustment of the onboard potentiometer increases the delay time within the selected range.
Figure 1: Top view of the FC-31Relay12v-001 module, highlighting its main components.
3. Specifications
| Parameter | Value |
|---|---|
| Model Number | FC-31Relay12v-001 |
| Operating Voltage | DC 12V |
| Load Capacity | 250V AC 10A or 30V DC 10A |
| Time Ranges | 8 selectable ranges (0.1s to 1 hour) |
| Adjustment Method | Potentiometer and Dip Switches (S1, S2, S4) |
| Dimensions (D x W x H) | 2.24" x 1.17" x 0.8" (approximately 57mm x 30mm x 20mm) |
| Material | Plastic, Electronic Components |
| Item Weight | 1.13 ounces (approximately 32g) |
4. Setup
Proper wiring is crucial for the safe and correct operation of the delay relay module. Refer to the diagram below for connection points.
4.1. Module Layout and Connections
Figure 2: Detailed module layout with labeled connection points and controls.
4.2. Power Connection
- Connect the DC 12V positive (+) power supply to the VCC terminal.
- Connect the DC 12V negative (-) power supply to the GND terminal.
- Ensure correct polarity to prevent damage to the module, although it includes power reversal protection.
4.3. Load Connection
The relay has three terminals for connecting your load:
- COM (Common): This is the common terminal of the relay.
- NO (Normally Open): This terminal is open (disconnected) when the relay is de-energized and closes (connects to COM) when the relay is energized.
- NC (Normally Closed): This terminal is closed (connected to COM) when the relay is de-energized and opens (disconnects from COM) when the relay is energized.
Connect your load circuit to the appropriate COM and NO/NC terminals based on your application's requirements (e.g., for a delay turn-on function, connect the load between COM and NO).
4.4. Trigger Input
The module features an external trigger terminal. When this terminal is closed (e.g., by a momentary switch, vibration sensor, or reed switch), the delay sequence is initiated. This input is typically connected to GND to trigger.
Important Note on S5 Jumper:
The S5 jumper, if present, connects VCC to the common terminal of the relay. If the relay is intended to control AC loads, do not plug in the S5 jumper. Plugging it in when controlling AC can cause high voltage to flow back into the module, potentially damaging it.
5. Operating Instructions
The delay time of the module is determined by two factors: the selected time range using dip switches S1, S2, and S4, and the fine adjustment using the potentiometer.
5.1. Time Range Selection
Use the dip switches S1, S2, and S4 to select one of the 8 available time ranges. The position '0' typically means the switch is OFF or in the default position, while '1' means it's ON or in the alternative position. Refer to the table and diagram below for specific settings.
Figure 3: Location of S1, S2, S4 switches and potentiometer.
Figure 4: Time range selection table for S1, S2, and S4 switches.
How to use the table:
- Identify the desired time range.
- Set switches S1 and S2 to the corresponding '0' or '1' positions as indicated in the table.
- Determine if S4 should be 'Null' (not inserted/open) or 'Insert' (closed/shorted) based on the desired range.
5.2. Time Adjustment Potentiometer
Once a time range is selected using S1, S2, and S4, the potentiometer (labeled 'TIME-ADJ' or 'Adjust potentiometer' in diagrams) allows for fine-tuning the delay within that range.
- Turn the potentiometer clockwise to increase the delay time.
- Turn the potentiometer counter-clockwise to decrease the delay time.
5.3. Operation Sequence (Delay Turn-On Example)
- Apply DC 12V power to VCC and GND. The Power LED will illuminate.
- Configure S1, S2, and S4 switches for the desired time range.
- Adjust the potentiometer for the specific delay time.
- Trigger the module by closing the external trigger terminal (e.g., pressing a button connected to it). The Time LED may illuminate or change state.
- After the set delay time, the relay will energize (NO closes, NC opens).
- The relay will remain in this state until the trigger is released or power is removed (depending on the specific mode, which can vary with module versions).
6. Maintenance
The FC-31Relay12v-001 module is designed for reliable operation with minimal maintenance. Follow these guidelines to ensure longevity:
- Keep Clean: Ensure the module is free from dust, dirt, and moisture. Use a soft, dry cloth for cleaning.
- Environmental Conditions: Operate the module within its specified temperature and humidity ranges. Avoid extreme conditions.
- Secure Connections: Periodically check all wiring connections to ensure they are secure and free from corrosion. Loose connections can lead to intermittent operation or damage.
- Avoid Overloading: Do not exceed the specified current and voltage ratings for the relay contacts.
7. Troubleshooting
If you encounter issues with your FC-31Relay12v-001 module, refer to the following common problems and solutions:
- Module does not power on (Power LED off):
- Check the 12V DC power supply connection to VCC and GND. Ensure correct polarity.
- Verify the power supply is providing the correct voltage (12V DC).
- Relay does not switch after trigger:
- Confirm the trigger input is correctly connected and functioning (e.g., the switch is closing the circuit).
- Check the time range settings (S1, S2, S4) and potentiometer adjustment. Ensure the delay time is not set too long or too short for observation.
- Verify the load is correctly wired to the COM and NO/NC terminals.
- Inspect the relay itself for any visible damage. In rare cases, a relay might be faulty (as noted in some user experiences).
- Incorrect delay time:
- Re-check the S1, S2, and S4 dip switch settings against the time range table (Figure 4).
- Adjust the potentiometer. Remember, clockwise increases time.
- Ensure the S4 jumper is correctly set (Null or Insert) for the desired range.
- Module damaged after connecting AC load:
- If the S5 jumper was inserted while controlling an AC load, this could cause damage. Always ensure S5 is not inserted when controlling AC.
8. Warranty and Support
For warranty information or technical support regarding your GODIYMODULES FC-31Relay12v-001 module, please contact the seller or manufacturer directly through your purchase platform. Keep your proof of purchase for any warranty claims.
