Alram ports on IP2M-841

[Bobber]

Does anyone have documentation on the I/O ports on the back of the IP2M-841 cameras? Or any info at all on these alarm ports? I've seen the question asked in various places but no answers yet. I use Blue Iris but their pixel-based motion detection is less than perfect (like when clouds drift by) so I'd like to move to PIRs. Any thoughts would be appreciated.