Hikvision DS-2CD2642FWD-IZS alarm out

[sammmy]

just purchased Hikvision DS-2CD2642FWD-IZS camera.but have been having trouble with the alarm output.
Can not find any information on the electrical characteristics of the alarm out.
What type is the output is? i.e. relay dry contact or semiconductor transistor type?
- Max and Minimum voltage that can be switched?
- Maximum current that can be switched?
The above information it would be greatly appreciated. In addition to the above I have not been able to find any information regarding how exactly the output should be connected in order to drive an external device such as a relay, siren, light etc.
Thanks

 

[alastairstevenson]

You'd be pretty safe connecting it to an opto-isolator. Low enough current needing to be switched, just a few mA, and no issue with excess voltage.
We did see the specs on here ages back, and I don't recall the fine detail except it was a solid-state pull-down output.