NV4232E-16P-EI Alarm Block Pinout

[katienelson71753]

You asked to see my board here it is and the 2 relays. I will work on trying to clean up the relay images some more.
From best I can tell:
HKE HRB1-S-DC5V 24C1K8
HKE HRB1-S-DC5V 24C2K8

[katienelson71753]

Ok did a search using these part numbers and found this:

[katienelson71753]

I'm not ready to even consider it without carefully studying this but questioning could this simply be swapped out with an NO relay. IF that's all it would take I have a professional hot air reflow station and 5 rolls of high temp kapton tape. The two different numbers makes me question it "24C1K8" and "24C2K8" that surely one is a NO relay and the other an NC relay. OR is this that the board circuit determines the type of relay? I'm getting all kinds of hits searching google for this part number but none specifies that it is a NO or NC relay.

[katienelson71753]

That confirms it that they are NO and NC relays but the board circuit may play a role in this too. I wish they said on the relay what it is. I found brand new ones for $5.00 but most of these the seller does not specify whether they are NO or NC.

https://www.ebay.com/itm/276413886714?_ ... BMrLbso5Bl

Keeping in mind these are rebranded Dahua boards it's highly likely that they had a set just like the amazon pic above and that's what went into them. I can't confirm it though without performing test or feedback from the manufacturer.

[Revo2Maxx]

Ok that is like my 5232E-16P NVR and shouldn't even have an issue with this.. The issue is the ones that only have 1 relay and 1 empty space where relay went.. In your NVR case the CTRL and P should just work as a NO relay already.. I would need to visit my 4216E-AI NVR because it also has the Block alarm pull out and does say CTRL and P but is just normal relay like NO1 and C1.

So no using a different relay in the spot shouldn't matter.. The issue is the Pins on the relay would still be the same and NO and NC are in different areas of the PCB it is soldered to. So no would need to use an external Relay to change from NO to NC state setup..

[katienelson71753]

Nah on mine and I've tested thoroughly which is why I used the photo sensor relay and led because CTRL and P is Alarm 2 output and IS an NC relay. (I tested also using continuity on my multi tester before hooking anything else to it. It beeps soon as I make contact with CTRL and P and stops beeping when Alarm 2 is triggered.) Any recommendations or link for something solid to convert this. Otherwise that led may last 20 years ...who knows

[Revo2Maxx]

So wait.. you are saying that on your device it is NO for alarm 1 but NC for alarm 2? I would need to see the under side of the NVR PCB as I don't know why they would make such a change from all other devices that are already built?

If you wanted to have something to convert a NC to an NO then you would have to build a Bridge board and solder it in the NVR or again use an external relay to change from NC to NO setup.

I will admit I just looked up the Dahua Master and it is also setup with the same markings as yours so maybe there was some reason they did 1 NO and 2 as NC but I know in my 4216E-AI that has that same block as my 5232-16P they are both NO alarms.. I will have to find someone with the Dahua master and ask them to confirm how it is setup in the E1 for them because if it was NC that is just crazy..

[katienelson71753]

100% confirmed Alarm 1 is an NO relay and Alarm 2 is an NC relay. You ever find out toss me a link for anything as one solid external unit that can convert this NC to an NO relay. Yup crazy setup. I don't know why other than what I said that the relays usually come in a set of 2 with 1 open and 1 closed and they threw it in there otherwise clueless. It's possible that some relays got mixed up on the assembly line. However, I have no solid way to confirm that like I say without serious testing which would require me to take down my NVR and study it.

[katienelson71753]

So I need a 12v "Change Over Relay" is what I've gathered to convert this from an NC to an NO relay. All I'm finding is automotive style. I wish I could find something with screw down terminals like the hiiletgo external relay I'm using on Alarm 1. Until then, the photo sensor relay is protecting Alarm 2 by providing 10 amp opposed to the internal relay's 2 amp.

Just checked the specs of the blue/red flashing strobe lights I just ordered on amazon and the amps comes out to 1.5A. I planned on putting it in tandem with a 12v 1A siren so that would be borderline coming close to risking the internal relay.

[Revo2Maxx]

Well from what the Picture you show the Relay being 5v so you would need a 5v relay that would be on a break out board, converted to NC. SO the pins going to the NVR PCB would be the NC from the relay.. But could just desolder and make that with the Relay you already own.

External relay easier to have 12v relay yes. But there are 5v power supplies around. There are a lot of things you can do. I mean if you are going to use 12v might as well do an External 12v relay so your 2 wires go to relay and then the relay once trigged then sends the 12v to your device.. Now I wish I would have bought the POE Version. I mean I have the first 42xx gen both of them are NO like my first gen 5232... must be a reason they went 1 NO and one NC.