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Guidance on Power Supply Connection for Motion Sensor Functionality

Tomeksup 9015 18
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  • #1 16827765
    Tomeksup
    Level 16  
    Hello

    I've already lost my patience. Despite the various patterns on the net, I don't know where to turn on the power supply.

    How to connect to make the motion sensor work?

    Guidance on Power Supply Connection for Motion Sensor Functionality [/ Img]
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  • #2 16827833
    burur
    Level 22  
    In mine it is like this:
    - 2 X blue plus one from the power supply -> 230V "N"
    - 2 x brown -> 230 "L" power supply
    - red plus the other from the power supply.
    Check the motion sensor thoroughly before connecting it to the power supply.
    greetings
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  • #3 16827897
    Tomeksup
    Level 16  
    Is that it?


    Guidance on Power Supply Connection for Motion Sensor Functionality

    Lights up for a split second and goes out. Connected directly under N and L lights up.

    Turning the knobs on the dusk and motion sensor does nothing.
  • Helpful post
    #4 16827949
    lukaszd82
    Level 31  
    Hello,
    I have the same with one Chinese sensor. Do not ask why, because I do not know, but when I give the voltage and it is bright, the sensor will flash and will not work even if it gets dark. However, if I connect it when it is dark, everything is ok.
    It looks like you connected everything ok ...
    Here you still have some info about damage in this type of PIR detectors link
    Attachments:
    • Guidance on Power Supply Connection for Motion Sensor Functionality Jak podłączyć czujnik ruchu do lampy schemat.png (28.19 KB) You must be logged in to download this attachment.
  • #5 16828041
    Tomeksup
    Level 16  
    Set from lidl. LED quickly fell. Maybe I have something wrong?

    Added after 14 [minutes]:

    Maybe the power supply is not here?
  • #6 16828142
    lukaszd82
    Level 31  
    Check if the phase is correct on the brown wire and neutral on the blue wire.
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  • #7 16828182
    Tomeksup
    Level 16  
    At the input from the plug with 230V?

    Added after 5 [minutes]:

    Until the led lights up, there is no current flow. I can't measure. At 230V the meter does not measure me, it is probably pounded.
  • #8 16828209
    burur
    Level 22  
    First check whether the power supply is in good working order.
  • #9 16828419
    Tomeksup
    Level 16  
    The power supply is ok. Shortly after switching on to 230V it works normally. New LED - shines without a problem.
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  • #10 16828450
    burur
    Level 22  
    After applying power, you need to wait some time for the motion sensor to "adapt".
  • #11 16828460
    Tomeksup
    Level 16  
    How much ? How long ?
  • #12 16828466
    burur
    Level 22  
    Sometimes it can take up to two minutes.
  • #13 16828467
    lukaszd82
    Level 31  
    Set the test to turn on the sensor in the darkest places, sensitivity to the minimum and time to half the scale (because you probably have the detector sensitivity control, lighting time and "brightness"). Connect the whole thing and wait for an hour. Check back later.
    The time depends on the setting on the potentiometer. At least in 3 pieces I have. In addition, these potentiometers are not very precise and I have a maximum burning time of about 30 minutes.
  • #14 16828485
    marqqv
    Level 32  
    Do you have (L) phase on brown? Do you have a tube? So check it . Instead of a transformer, plug in a light bulb or it will glow (in the socket, make sure you remember the rules, use cubes or other connectors / insulation)
  • #15 16828501
    Tomeksup
    Level 16  
    Gentlemen, as I remember, buying and connecting worked immediately. Then it stopped working. The led failed and did not shine. Led replaced. If I give 230V directly to the driver, it shines without a problem.

    Hmmm, if I find a sampler, I'll check it out.

    Added after 3 [minutes]:

    Verify the connections again according to the photo above.

    Added after 6 [minutes]:

    After touching the probe, everything shines, i.e., brown, blue, red.

    I have no idea what's going on.
  • #16 16828753
    lukaszd82
    Level 31  
    Read the topic of control electronics diagnostics to which I gave a link earlier. There is a diagram and it was probably mentioned that in these detectors a capacitor may fall and then the electronics go crazy. Measure the capacitance of this capacitor. Details can be found in the topic indicated.
  • #17 16830699
    Tomeksup
    Level 16  
    I think the link got out, please again.
  • #19 16831816
    Tomeksup
    Level 16  
    Thanks, I'll start reading. I wonder how much I can understand that.
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Topic summary

✨ The discussion revolves around troubleshooting the power supply connection for a motion sensor. The user is experiencing issues with the sensor not functioning correctly despite following various online guides. Responses suggest checking the wiring connections, ensuring the correct phase and neutral are used, and verifying the power supply's functionality. Some users mention that the sensor may require a period to adapt after power is applied, and adjustments to sensitivity and timing settings may be necessary. There are also mentions of potential issues with the sensor's internal components, such as capacitors, which could affect performance. Overall, the conversation emphasizes the importance of correct wiring and settings for successful motion sensor operation.
Generated by the language model.

FAQ

TL;DR: Typical PIR sensors need up to 2 minutes to stabilize; “Sometimes it can take up to two minutes.” Wire blue to N, brown to L, and red as the switched output. [Elektroda, burur, post #16828466] Why it matters: This FAQ helps DIYers quickly wire and debug a 230V PIR motion sensor so lights actually turn on.

Quick Facts

How do I wire a 230V PIR motion sensor so it actually works?

Connect two blues (including supply neutral) to N, two browns to L (line in), and red to the load’s live input. This routes unswitched line and neutral to the sensor while the red wire becomes the sensor’s switched live to your lamp or LED driver. Tighten terminals and insulate all connections. [Elektroda, burur, post #16827833]

Why does my lamp flash once on power-up and then stay off?

Some low-cost sensors misbehave if powered in bright conditions. One user observed a flash at power-on in daylight, and the unit only worked when connected in the dark. Power up in low light and test again after warm-up. Adjust dusk and time knobs afterward. [Elektroda, lukaszd82, post #16827949]

Do PIR sensors need time to stabilize after switching on?

Yes. Expect a short warm-up before proper motion detection. As one expert put it, “Sometimes it can take up to two minutes.” Don’t tweak controls until this adaptation finishes. Avoid rapid power cycling during this period. [Elektroda, burur, post #16828466]

What initial knob settings should I use for a clean first test?

Set dusk to the darkest symbol, sensitivity to minimum, and time to mid-scale. Leave the installation powered and observe for up to an hour. Some units can hold the output for about 30 minutes at maximum. This reduces false triggers while you verify basics. [Elektroda, lukaszd82, post #16828467]

How can I confirm phase and neutral are not swapped?

Verify the brown conductor is live (L) and the blue conductor is neutral (N) at the supply. Use a proper voltage tester and safe methods. Correct polarity helps the sensor and load behave predictably and avoids nuisance faults during testing. [Elektroda, lukaszd82, post #16828142]

What’s a safe way to test the circuit without my LED driver?

Use a simple light bulb as a test load in a safe holder or socket. Follow electrical safety rules, use proper connectors or terminal blocks, and insulate exposed conductors. If the bulb behaves, the issue may be with the driver or settings. [Elektroda, marqqv, post #16828485]

My LED failed earlier; the new LED works on 230V but not through the sensor—what next?

First, confirm the power supply/driver is healthy. Then recheck wiring, restore default test settings, and allow the sensor to warm up fully. If it works briefly on direct 230V but not via the sensor, focus on the sensor’s output path and dusk/time settings. [Elektroda, burur, post #16828209]

What does it mean if touching a meter probe makes everything light up?

That observation suggests the circuit is sensitive and on the edge of triggering. Re-verify each connection, confirm phase/neutral, and repeat the test after warm-up with conservative settings. Replace the load with a bulb to simplify diagnostics. [Elektroda, Tomeksup, post #16828501]

Could a faulty component inside the PIR cause random behavior?

Yes. A failing capacitor in the detector electronics can cause unstable or erratic output. Measure the capacitor’s value and replace it if out of tolerance. “Faulty capacitors make the electronics go crazy,” as discussed in the linked diagnostics. [Elektroda, lukaszd82, post #16828753]

How long can the light stay on after motion is detected?

On some units, the on-time can reach about 30 minutes at the maximum time setting. This is useful for area lighting but can hide wiring issues during tests. Start at mid-scale and tune upward only after stable operation. [Elektroda, lukaszd82, post #16828467]

What’s a simple three-step procedure to commission the sensor?

  1. Set dusk to darkest, sensitivity to minimum, and time to mid-scale. 2. Power the unit and leave it undisturbed during warm-up. 3. After observation, fine-tune time and sensitivity in small increments. [Elektroda, lukaszd82, post #16828467]

Where can I find the diagnostics link mentioned in the thread?

It’s referenced in the 4th post of the discussion. Review that post to access troubleshooting details about common detector faults and checks. [Elektroda, Witold5, post #16831244]

Does it matter which way I connect live and neutral at the input?

Yes. Connect the phase to the brown wire and neutral to the blue wire. Incorrect polarity can prevent proper triggering and complicate troubleshooting. Confirm with a reliable tester before energizing the circuit. [Elektroda, lukaszd82, post #16828142]

If the sensor worked when new but stopped later, what should I suspect?

Check the load first, since an LED or driver failure can mask sensor behavior. Then verify wiring, allow warm-up, and test with a simple bulb. If issues persist, inspect the detector electronics for a degraded capacitor. [Elektroda, Tomeksup, post #16828419]

How long should I wait before concluding the sensor is faulty?

Allow the full warm-up (up to about 2 minutes) and an extended observation with conservative settings. If the sensor still fails to trigger reliably with a bulb load and correct polarity, investigate internal components like the timing capacitor. [Elektroda, burur, post #16828466]
Generated by the language model.
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