Hello IPcamTalk folks!
I recently purchased a couple of IPC-HFW4239T-ASE from EmpireTech, and I'm having trouble understanding the "alarm out" wires that are provided. Dahua's spec sheet makes it sound like the output can deliver 300mA at 12VDC (from IPC-HFW4239T-ASE), which I need to use to drive a MOSFET that turns on some security lights.
However, the cameras don't seem to deliver any voltage, and the two cameras behave differently when the alarm output is activated. One goes from open between the Alarm_Out and Alarm_Out_GND wires to 100ohms, as indicated by https://dahuawiki.com/Ip_camera_alarm , and the other goes from open to 0 ohms, which doesn't match anything that I've found from Dahua.
Any clarification on how this output wire is supposed to work would be helpful. I'm trying to drive a MOSFET board that needs between 3.3 and 24VDC to drive the FET, so the 12V promised would be perfect.
@EMPIRETECANDY Any thoughts?
I recently purchased a couple of IPC-HFW4239T-ASE from EmpireTech, and I'm having trouble understanding the "alarm out" wires that are provided. Dahua's spec sheet makes it sound like the output can deliver 300mA at 12VDC (from IPC-HFW4239T-ASE), which I need to use to drive a MOSFET that turns on some security lights.
However, the cameras don't seem to deliver any voltage, and the two cameras behave differently when the alarm output is activated. One goes from open between the Alarm_Out and Alarm_Out_GND wires to 100ohms, as indicated by https://dahuawiki.com/Ip_camera_alarm , and the other goes from open to 0 ohms, which doesn't match anything that I've found from Dahua.
Any clarification on how this output wire is supposed to work would be helpful. I'm trying to drive a MOSFET board that needs between 3.3 and 24VDC to drive the FET, so the 12V promised would be perfect.
@EMPIRETECANDY Any thoughts?