The wiring of the time switch and LED power supply must be performed according to the following steps to ensure that the 220V AC power is converted to low-voltage DC power to supply power to the illuminated signs:
I. Core Wiring Steps
Connecting the Mains Power to the Time Switch
Connect the live wire (L) and neutral wire (N) of the 220V AC mains power to the input terminals of the time switch (usually marked "L" and "N" or "Input").
Function: The time switch controls the on/off state of the circuit through a preset time, managing the switching time of the illuminated signs.
Connecting the Time Switch Output to the LED Power Supply
Connect the output terminals of the time switch (live wire L and neutral wire N) to the rightmost live/neutral input terminal of the LED power supply (usually marked "L" and "N" or "Input").
Function: After the time switch is activated, the 220V AC power enters the LED power supply for voltage conversion.
Connecting the LED Power Supply Output to the Illuminated Signs
The LED power supply has 6 terminals (output terminals) on the left side. The first three are positive (+), and the last three are negative (-). Connect the positive wire of the illuminated sign to any positive terminal, and the negative wire to the corresponding negative terminal.
Note:
Most LED power supplies can have their positive and negative terminals connected arbitrarily (e.g., 1 positive to 4 negative, 2 positive to 5 negative), but if the sign does not light up, connect the wires according to the 1-4, 2-5, 3-6 correspondence.
Ensure correct positive and negative connections to avoid short circuits or damage to the lights.
II. Key Precautions
Voltage Matching: The time switch is a 220V AC device. The LED power supply needs to convert 220V to low-voltage DC (e.g., 12V/24V) to ensure it matches the voltage of the illuminated sign lights.
Wiring Sequence: Connections must be made in the order of "Main Power → Time Switch → LED Power Supply → Illuminated Sign." Skipping the time switch or directly supplying power is strictly prohibited.
Safe Operation: Disconnect the power supply before wiring and use insulated tools.
Check for damage to the wires and avoid exposed wires contacting metal parts.
Secure all wiring terminals to prevent loosening that could lead to overheating or fire.
III. Troubleshooting Common Problems
Illuminated Signs Not Lighting Up:
Check if the time switch is powered on (check if the time setting is correct).
Confirm there is 220V voltage at the LED power supply input (measure with a multimeter).
Check if the positive and negative terminals of the outputs are connected correctly (try wiring 1-4, 2-5, 3-6).
Replace the LED power supply or the illuminated sign fixture to test if it's a device malfunction.
Time Switch Malfunction:
Check if the time setting has been mistakenly modified.
Confirm the internal battery of the time switch (if any) has sufficient power.
Replace the time switch to test if it's a device malfunction.
IV. Wiring Principle Summary
The time switch acts as the control hub, managing the power supply to the LED power supply by periodically switching the 220V AC power on and off. The LED power supply converts high-voltage AC to low-voltage DC, providing a stable power source for the illuminated signs. Correct wiring enables automated lighting control while ensuring electrical safety.
