Amcrest NV4232E-16P-EI

[katnelson7175]

My alarm block looks like this:

NO1 C1 GND 1 2 GND
CTRL P GND 3 4 GND

My current setup is 12v 1 amp power supply (+) to alarm siren (+) and (-) from power supply to NO1 with (-) from siren to C1.
My specs sheet says it has 2 alarm outputs and 4 inputs. What I'm seeing is if I remove the pluggable alarm block from the top
and stick it into the bottom the siren will remain active (NC - Normally Closed) unless I click manual in the NVR settings to disable it.
If it's the same as NO2 and C2 it is NC and anything connected will be always on 12v.
I can potentially use this anyways such as to turn power off to an electric lock on a dog fence but I'm questioning how to change this
to a Normally Open or NO.

 

[katnelson7175]

A

Thread 'Alarm Output Rating'

Aug 2, 2023

Hi,

I am looking at this Dahua NVR with alarm output NVR4216-4KS2/L

From the docs, there is a link to this document which states rating is.

Can someone please explain what is the output of the alarm output ports on the NVR?

• ahuelbia
• Replies: 12
• Forum: Dahua

In manual it says CTRL is

"Controllable 12 V power output. It is to
control the on-off alarm relay output. It
can be used to control the device alarm
output. At the same time, it can also be
used as the power input source of some
devices such as alarm detector."


And P is

"+12 V power output port. It can provide
power to some peripheral devices such
as camera and alarm device. Make sure
the power supply of peripheral device
shall be below 1 A."
I've got two separate 12v relays as I knew the nvr has 2 alarm outputs.

That's the same thing I found google searching but it wasn't in my manual.

So I'm questioning:

or running the light's (+) to P

 

[katnelson7175]

Removed the pluggable block for NO1 C1 GND 1 2 GND
and tested on GND with my multitester (-) lead and (+) lead to P
It is confirmed without anything else hooked up 12v+