Does the PR511 security floodlight take up 2 unit codes like the ActiveEye motion sensors ?
Yes and/or no. The floodlight is set just like an appliance module "one House and unit code". But it has selection switches allowing the user to select [to use] up to four addition [called + 4] units that can be controlled/triggered ON with motion. As well as another [+4] codes that can be turned on/off with the dusk to dawn function.
So the PR511 can only use ONE house/unit code. Or it can use (up to) nine.
I have one floodlight: That only turns itself on.. at night.. with motion. However it also turns on one other code (inside LED lights) at dusk.. then turns the code off at dawn. I use a timer macro (in AHP) that turn the LEDs off late at night... then back on in early morning.
Another floodlight: Has no dusk/dawn function... yet when motion is detected turns on a camera, a VCR [commander], a set of video sender-receivers, a light, a chime.
I really like the floodlight.