The_Fixer80 (Customer) asked a question.
HC-SR501 PIR Motion Sensor integration
I have a bunch of HC-SR501 PIR motion sensors from the Arduino/ESP32 days that I would like to pull into my BRX PLC if possible. I have typically run them off of 5vdc in the past but 12vdc is possible. These sensors only accept up to 20vdc so I dont think I can use the digital inputs that my 24vdc sensors use right? Can anyone assist with a sample wiring diagram? Thanks!
You can use these just fine. Supply it with a 5v DC power supply voltage:
https://www.automationdirect.com/adc/shopping/catalog/power_products_(electrical)/dc_power_supplies/din_rail_mount/psrs-05-30
Connect the commons of the power supply to the input module. The output of those sensors is is 3.3v so you need to use these modules for input:
https://www.automationdirect.com/adc/shopping/catalog/programmable_controllers/brx_plcs_(stackable_micro_brick)/dc_i-z-o/bx-16nf3
Leakage current of those sensors is under the maximum off current so it should work just fine.
Perfect! I did not see the 2-5vdc DIO modules! Thanks!
FYI, you can get a quick synopsis of the expansion module breadth/depth from the Dashboard screen in Designer and right-clicking to the right of the MPU to bring up a context menu and hit Add Module. From there you get a set of submenus of all the available I/O expansion modules that have short descriptions of the part numbers:
With we do motion, we used this on a regular 24VDC switched input. Wattstopper Motion Sensor, Pir Tile Ceiling Mount Occupancy Sensor, 1200 Sq. Ft, 24V White
That makes sense! Those PIRs are a few hundred dollars right? Might make sense for me to buy the 5vdc binary module? I appreciate your response!