That's how I always used the typical hardware store PIRs.
Actually, re-reading your question made me realize the answer. IF you are trying to run a higher current item off of the PIR, a relay MAY be necessary if the item you're running off the PIR draws more current than the PIR is able to provide.roadkill said:I have always had a question with it comes to this.
I have seen folks mention the need for a 120V relay when using a PIR to trigger a prop (assuming it's using 120V to begin with).