Hi all
New to the forum and relatively new to IP Cams, NVRs etc, but familiar with IT, building PCs, basic electronic principles etc. Here’s the thing… I’ve bought an NVR - Hikvision DS-7600NI-E2/8P/A minus the original case and without its PSU.
I plan to house it in a case with bigger, slower fans so as to run it coolly and quietly in our front room, as I gather from others on this forum that Hik NVRs are not the quietest.
So basically, first, I need to verify that I haven’t bought a pig in a poke and need to test it applying 12V to the 6 pin Molex on the main board with the correct polarity before I start the project proper (pic 1).
I see that there’s also a 2 pin, white, 52V (pic 2) connector on the PoE port board, but I understand that the NVR will run OK without 52V for testing purposes (I’m not testing the PoE aspect right now).
I can’t see any +- polarity marks on the PCB for either connector and I couldn’t find the pinout info I need on this site, so I did some testing with the meter. Pomeroy left some info on the topic here https://tinyurl.com/k77jydz5 (most appreciated) but not quite enough. So, right now I’m suffering from a lack of PSU to test the black/yellow wires’ polarity sadly.
Upon testing, I found that there was 0Ω between all 3 pins on the clip side of the Molex and in turn, 0Ω between these and the PCB mounting pillar earths. I then checked between these 3 pins and the two pins on the 52V connector. I found there was also 0Ω from the 3 pins to the one of the pins (one nearest the corner of the PoE board) of the 52V connector.
I also tested and found 0Ω between the other 3 remaining Molex pins (opposite side to clip)
To sum up then, by elimination, it looks a lot like polarities are as follows:
- 3 pins on the clip side of the Molex (all connected together i.e. paralleled) – Negative (earth) )
- 1 pin on the 52V connector – Negative (earth) ) All 3, same potential (so earth)
- All earth contacts on PCB - – Negative (earth) )
- 3 remaining Molex pins opposite side to clip (connected together i.e. paralleled) – Positive +12V
I know the convention for PCs is that yellow wires are +12V and black are Negative 0V but I’m not 100% sure that NVR PSUs follow the same colour convention.
Just wondering if anyone knows categorically that the NVR PSU 6 pin Molex 12V plug is yellow for +12V wires and black for 0V (Neg) wires. Any thoughts welcome, long winded for a first post I know, but I really don’t want to fry my board : - )
Thank you.
New to the forum and relatively new to IP Cams, NVRs etc, but familiar with IT, building PCs, basic electronic principles etc. Here’s the thing… I’ve bought an NVR - Hikvision DS-7600NI-E2/8P/A minus the original case and without its PSU.
I plan to house it in a case with bigger, slower fans so as to run it coolly and quietly in our front room, as I gather from others on this forum that Hik NVRs are not the quietest.
So basically, first, I need to verify that I haven’t bought a pig in a poke and need to test it applying 12V to the 6 pin Molex on the main board with the correct polarity before I start the project proper (pic 1).
I see that there’s also a 2 pin, white, 52V (pic 2) connector on the PoE port board, but I understand that the NVR will run OK without 52V for testing purposes (I’m not testing the PoE aspect right now).
I can’t see any +- polarity marks on the PCB for either connector and I couldn’t find the pinout info I need on this site, so I did some testing with the meter. Pomeroy left some info on the topic here https://tinyurl.com/k77jydz5 (most appreciated) but not quite enough. So, right now I’m suffering from a lack of PSU to test the black/yellow wires’ polarity sadly.
Upon testing, I found that there was 0Ω between all 3 pins on the clip side of the Molex and in turn, 0Ω between these and the PCB mounting pillar earths. I then checked between these 3 pins and the two pins on the 52V connector. I found there was also 0Ω from the 3 pins to the one of the pins (one nearest the corner of the PoE board) of the 52V connector.
I also tested and found 0Ω between the other 3 remaining Molex pins (opposite side to clip)
To sum up then, by elimination, it looks a lot like polarities are as follows:
- 3 pins on the clip side of the Molex (all connected together i.e. paralleled) – Negative (earth) )
- 1 pin on the 52V connector – Negative (earth) ) All 3, same potential (so earth)
- All earth contacts on PCB - – Negative (earth) )
- 3 remaining Molex pins opposite side to clip (connected together i.e. paralleled) – Positive +12V
I know the convention for PCs is that yellow wires are +12V and black are Negative 0V but I’m not 100% sure that NVR PSUs follow the same colour convention.
Just wondering if anyone knows categorically that the NVR PSU 6 pin Molex 12V plug is yellow for +12V wires and black for 0V (Neg) wires. Any thoughts welcome, long winded for a first post I know, but I really don’t want to fry my board : - )
Thank you.
