PIR motion sensor - alarm output ("Apollo Elite")

Old 03-27-03, 02:00 PM
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PIR motion sensor - alarm output ("Apollo Elite")


This is my first time trying to set up an alarm system and Iím looking for some help with an "Apollo Elite" PIR sensor's alarm output.

I've connected 0V and 12V to connector-1 and connector-2 respectively. Now when I walk across the face of the PIR sensor, the LED lights up which seems to be correct. From reading the data-sheet, my understanding is there should also be a motion detected output from either connector-3 or connector-4, where this is normally 24V and on detection the output should drop to 0V... but there is always 0V on the outputs from connector-3 and connector-4. In fact none of the other connectors change voltage level even when the LED lights up on motion detection. I'm confused. I've emailed the manufacturers (Guardall www.guardall.co.uk) and they have not replied.

How do I set up this PIR sensor so I can get a motion detected output?

The data-sheet for the "Apollo Elite" can be downloaded by going to http://uk1.farnell.com/Welcome/welco...gistered.jhtml and searching for the order code: 465069

Any and all advice will be greatly appreciated.

Old 03-28-03, 04:11 PM
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figured it out.

connector-3 and connector-4 simply act like a switch (normally closed). so any voltage you pass through gets cut off once movement is detected. this is controlled by a relay within the unit.

for some reason i thought that the unit would actually output a voltage on either of the connectors.
Old 03-28-03, 10:27 PM
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I'm not sure which system you are trying to connect it to, but typically on alarm systems there is little to no voltage on the relay, just enough for the panel to monitor the loop (the exact voltage depends on the system.) Well, anyway, it sounds like you've got it connected now. Pretty simple, AUX power to your 12V and Ground, then your NC and COM makes a loop back to your panel. Like you say, it's just a relay on the PIR, open/close. Normally closed - so in the inactive state you have a closed looped. When you walk in front of the motion, it opens the loop. No polarity on that loop either.

Sorry I couldn't reply sooner, it's been a busy week But glad you got it fixed. Let us know if you have any other questions - I usually respond much faster.

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