Huawei R4850G2 CAN BUS Power Supply Settings

[@felixkrocher8103]

Damn I have been looking for this for ages now thank you so much ❤

[@elderbautista4314]

Thank you for your support, sorry in the software as I change the address from Send to Receive.

[@zlane71]

Excellent video. The information provided is very useful. Thanks.

[@digitronix.ceodigitronixic6184]

Thanks greatly dear friend for this Educative video... Sorry for asking for the circuit diagram of the 10k resistor to the terminals and the link between address port and the output port. Thank you very much

[@lanierje]

The 10k is a light load for the power supply. I don't like to run switching supplies with no load. It is probably not needed. The link connects the slot detect 1 and slot detect 2 pins to the output negative. This is needed to enable the power supply. See the beyondlogic.org review-huawei-r4850g2-power-supply-53-5vdc-3kw

[@goback-si7mf]

Very good video. How is the can buss connected to the powersupply?

[@XAVI-dn2ob]

Thank you very much for the video, it's great.

[@raefshehata2218]

Great video, thank you for sharing. Was just wondering about the limit of the output voltage that you can control through the CANbus messages. Can you go anywhere between 0 to the max value, or just a few volts around the nominal value? Thank you.

[@lanierje]

Online limits :41.5V to 58.5V Offline limits:48V to 58.5V Offline is where you can set a default boot voltage.

[@ahmadfullheart-yc1vn]

What value for 48v?

[@ScifinewsDE]

NIce, can you change the amperage/power output as well?

[@marcelvoolstra8525]

Hi great video. I have got a Huawei PSU480A, got can bus working, get similar reports, tried the same address / message as for R48850G2 to set the voltage but does not work. Have you, or somebody else any lead to instruction set for Huawei PSU480A ? Thks in advance.

[@Frank-bh3cm]

Where did you buy the Huawei? Are you planning to hook up a bench top power supply to modify and display output voltage and current?

[@lanierje]

I think I got it on ebay. I know I got the connector block on ebay. I will use this as a power supply for LDMOS RF amplifier.

[@benzimanagbozo3607]

Can it vary the voltage

[@renezwart3201]

Hi, great information!! Noted the resistor between the DC power connection; Why did you fit it and what's the value? Thanks!

[@lanierje]

I don't like to run switching power supplies unloaded, so I lightly loaded it with 10k resistor.

[@renezwart3201]

@@lanierje Thanks!

[@jbpaul3208]

Thanks for a helpful video. Any idea why I can't get the startup voltage setting to stick? I get an ACK packet with a 0x21 error indication when I send the 01 01 frame. I can set the voltage while it is running just fine and it returns to default in 60 seconds, as expected.

[@lanierje]

To set default boot voltage the command is slightly different. Also, the range is less than on the fly setting. See: www.beyondlogic.org/review-huawei-r4850g2-power-supply-53-5vdc-3kw/

[@esuohdica]

i would love to know if you can monitor the real time current draw over Canbus? I'm thinking about charging batteries and being able to kill the PSU when current draw drops below say 1 Amp, meaning batteries are fully charged.

[@nofu1622]

Very nicely done, how did you figure out the variables i.e. frame ID etc.?

[@lanierje]

I found some reverse engineered code on the web. Probably done from snooping.

[@coreyluckhaupt6276]

Have you tried the 2 power supplies in parallel and observe the CAN BUS for communication?

[@tanishqbhaiji103]

Can you tell how to limit current?, Do you have a tutorial video on how to set this all up?

[@lanierje]

01 04 00 00 00 00 ii ii Default Current (I don't know limits) ii ii = 30 x Current [A] Example: 20 Amps 30x20a= 600 600dec = 0258hex 01 04 00 00 00 00 02 58

[@tanishqbhaiji103]

@@lanierje thank you

[@Навчання-п2ы]

Hi. Can you advise me. What request should be sent to get the output current and voltage?

[@The_Unobtainium]

Mate, do you know if Huawei R4830N2 is using the same communication protocol?

[@goback-si7mf]

Very clever technology

[@Ercani]

Hi. Do you have current limit modification ?

[@KF8OD1]

Nice work!

[@nelolone7931]

Hello nice video.Can i set (change) volt and amperes without using can bus.For this switching power unit.Thinking any switch inside of it.Thank you

[@lanierje]

No, you need CANBUS to change the settings.

[@nofu1622]

Have a look here: kzbin.info/www/bejne/i2qvdmt8ic2Vhrc

[@uweweltin5276]

Very Good Information. Thank you for that video. I have a r75020G1 from Huawei and Need to Limit the Output current via can Bus. I got the charger from China via Ebay. Unfortunately they cannot give me any Information about can Bus address and values. I expect the same settings as with your device but i am not sure about it. Could you give me hints where to get this Information. Huawei here in Germany is Not willing to help.

[@harvestpeter]

Is it possible to use CAN bus to reduce the fan speed and set that as default on power up? I want to use this supply for LDMOS RF amp like you amplifier that only needs 1200W so the fan could run slower and quieter. If speed can't be controlled by CAN do you know if I could add resistors in series with the fan or will the supply detect low rpm and shut down?

[@lanierje]

Good question about the fan speed. I honestly don't know the answer to that. Also, it may be that the fan has feedback to the drive circuit so I'm not sure resistors would work. I know this is the case with many server power supplies.

[@mubbashirshirazi3758]

hey there i need help did you connect slot detet pin to ground while doing the above mentioned programing in video secondly you didnt connect the ground with usb to can and thirdly from viewing from top is the pin next to slot detect pin is it canL ?

[@lanierje]

see picture www.chemroc.com/MISC/PICCAN/CanBuss.jpg

[@nievesvargasfernandezsalas4720]

Puede hacer un instructivo de como bajar voltaje a la fuente Huawei R4850G2, y explicar paso a paso por favor

[@elderbautista4314]

Mr Lanierje Excuseme sir, all these data like 54570, hexadecimal D52A and 010000000000 as you got them.

[@lanierje]

Try this link for protocol: www.beyondlogic.org/review-huawei-r4850g2-power-supply-53-5vdc-3kw/

[@玉昌]

4875g By changing the feedback resistance, replacing the output mos, and rewinding the transformer to replace the capacitor, the high voltage can be changed.

[@lanierje]

That defeats the purpose of this video. This video shows how to change output voltage and current limiting by software. No hardware modifications.

[@mr.simulator4724]

yeah right

[@Jacksonmannn]

Hi ! why is the minimum fan speed only at voltage 53.5V? how to make at minimum voltage of 48V?Thanks !

[@lanierje]

Voltage a6c0 - ea67 Default Voltage c000 - e99a C000=48volts To set default boot voltage the command is slightly different. Also, the range is less than on the fly setting. See: www.beyondlogic.org/review-huawei-r4850g2-power-supply-53-5vdc-3kw/

[@Jacksonmannn]

@@lanierje I'm sorry for my bad English! I figured out how to set the right voltage! thanks ! I don't understand why at 48/58v or any other, the fan turns faster than at 53.5V? is it possible to set the minimum fan speed at 48V as at 53.5V?

[@mevk1]

Found and installed the software on my computer. Copied/added both the default & max voltage frames exactly how you have them(thank you!)! Located a decimal to hex converter calculator to convert minimum voltage of 41.5V. Following your lead (hex = a55a=41.5V) Wondering if a macro of some sort could be used to set on the fly voltage and current without manually sending every minute? Any idea if these frames/code would work on any other Huawei power supplies, and have you discovered any other functions? ((Thanks again for sharing information! PS - I just ran/opened com port for kicks in the App without hardware and of course rec'd an error message, but the error message was in Chinese so totally indecipherable and useless -are all error messages in Chinese?

[@mevk1]

To answer my own question, apparently CAN implementations are different for different devices and manufacturers, the easiest most certain way for you to get this information would be to contact the manufacturer. There are some web references such as this one, but they seam to be few and far between.

[@thomash5484]

I've seen modified versions on AliExpress that go up to 98v. Any idea how that modification has been done? Would it be possible via CAN BUS requests?

[@rensverhagen1]

Im also searching for this solution. I believe one of the resistors (22k) has been replaced with a potmeter and a resistor in series to achieve 22k in the middle of the range of the pot meter. But the exact resistor i dont know yet. Im planning to buy one from ali, huawei 4875 version and take it apart, if i can find the way they did i will report it to you.

[@rensverhagen1]

But it never could be safe as most of the condensators used are only rated up to 63v, but i will also check those if they might have been replaced

[@russellwilson5246]

hi ian looks like you only have a few options for voltage ...using the can buss to usb adaptor can i chane the voltage and amps down and have them stay there?..i read in coments you answer lowest voltage is 41.5..but im not sure if it will stay at chosen lowest voltage or amps..did you make that short menue or is that standard and is there more to the menue?..can you scroll down for more options?

[@lanierje]

I think the values are limited to 41.5 to 58.5 active mode and 48.0 to 58.5 for setting default boot. So if you want to sustain an active mode voltage without making it default, you have to continuously send the command as demonstrated in the video. When you say menu I think you are looking at the commands I entered manually. You will need to refer to the power supply protocol to create your own commands.

[@russellwilson5246]

@@lanierje ok thanks for that reply it was helpfull to know im not going to get my voltage i want and have it stay there ( 43.8v) with this system/path. and i dont know if i can turn down amps.

[@oluwadaraolaifa3916]

Hello, I tried this, but I can't seem to get any reading from my can bus analyzer

[@sp2fp]

Hello do you know the code Output overvoltage protection 58.5~60.5VDC(can be set by PMU) Maybe can set 60v supply

[@lanierje]

I don't know of any over Volt protection. I just know the code for setting V up to 58.5

[@sp2fp]

@@lanierje OK.

[@hrkaci]

Hi, is possible set default voltage to 50V ? I mean after switch on the PSU and dont change aby vaule thru CAN

[@lanierje]

Yes you can. You use CAN to set a default startup voltage. You no longer need CAN if that is the voltage you will always use. I covered this in the video.

[@hrkaci]

@@lanierje Awesome, thanks

[@davidmiles250]

Hi, Do you know if you can set a current limit? E.g. set it to 10a max? Thanks so much :)

[@lanierje]

If my calculations are right 108180FE;01 03 00 00 00 00 01 2C should set a 10A limit. Last 2 bytes 01 2C = Decimal 300 Current limit is 30 x A. hence 30 x 10A=300. 300 in hex is 01 2C (for default boot current first 2 bytes are 01 04)

[@davidmiles250]

@@lanierje That is excellent :) Thanks so much, I will buy one of these devices and give it a go!

[@superheroesmedioambientale1627]

Buenas tardes.. muy buena su explicación, un favor necesito cambiar mi fuente R4850G2 a 48 voltios, puede ayudarme en esto. Tengo el analizador de el software, necesito sus conecciones de la salida DC al analizador. Agradecido César aliaga

[@أسامةالجتويالسندي]

How did you connect a resistor? If we don't connect a resistor what is the difference? I didn't connect a resistor and my psu is working perfectly, but the problem is lower voltage 53.5v, I use it to charge my ups batteries of 48v system, I need 58.4v to charge what should I do for it

[@Xmors]

لو عرفت تتحكم فيه محتاج مساعدتك لو سمحت.

[@elderbautista3202]

How to leave this power supply working at 45 volts

[@lanierje]

Not possible. Default voltage minimum is 48V. Voltage a6c0 - ea67 Default Voltage c000 - e99a C000=48volts

[@miguelnarvaez311]

Seria de la siguiente manera para obtener 48V. The 01 00 indicates send value. The C1 16 =49430 in decimal.And 49430/1020=48,46volts

[@FrUcHtZwErGooo]

a very helpful video thanks For Default Boot values ( as a Charger ) ? x1020 for Volt , and x30 for AMPERE ? 108180FE;01 01 00 00 00 00 DF 20;100; for Boot Voltage 56volt? 108180FE;01 04 00 00 00 00 5 DC;100; for Boot 50 AMPs ? would that be so correct?

[@lanierje]

correct

[@FrUcHtZwErGooo]

@@lanierje THX

[@johnkalouris8835]

@@lanierje Hello is possible pleases to explain hoe to convert the volts to decimal number e.g 01 01 00 00 00 00 DF 20;100; i need to change to 50V can you please tell me exactly how the conversion is done, use some calculator Thanks

[@lanierje]

@@johnkalouris8835 50X1020=51000, 51000 in hex=C7 38 so default voltage of 50 would be 01 01 00 00 00 00 C7 38 also on the fly change to 50 would be 01 00 00 00 00 00 C7 38 start with decimal value, then enter dec value in calculator in programmer mode. HEX can be read. Or you can do the conversion yourself. HEX c7 38 12*16^3=49152, 7*16^2=1792, 3*16=48, 8*1=8 so 49152+1792+48+8=51000, and 51000/1020=50volts

[@benzimanagbozo3607]

Pls where can I get this software?

[@lanierje]

After purchase email seller. They send a link for download.

[@benzimanagbozo3607]

@@lanierje ok

[@benzimanagbozo3607]

Can this make the psu a variable type? From 0v to 58v??

[@lanierje]

@@benzimanagbozo3607 I don't think so. I think the values are limited to 41.5 to 58.5 active mode and 48.0 to 58.5 for setting default boot.

[@Mr_Wh1]

@@lanierje Did your R4850G2 become very hot when turned on without a load on the output? Mine do, and I am pretty sure it's not supposed to happen. I just want to be certain it isn't some weird supply pumping, or inductance dumping that causes energy to be converted to heat. The supplies are very expensive now, so I would prefer not to have to buy a new one...

[@marcelbenhur6230]

ne fonctionne pas pour moi !! j'ai testé avec 2 can_bus différent. j'ai le même can_bus que la vidéo. vitesse du port: 115200. donnée: 8. parité: non . bit arret:1 . flux non.

[@lanierje]

COM=2000000 and CAN bps= 125kbps

[@marcelbenhur6230]

@@lanierje oui, j’ai mis les meme valeurs que la vidéo.

[@lanierje]

@@marcelbenhur6230 Be sure slot detect pins are connected to neg. Also need some load on dc output. It can be a light load of 10k or so for testing. For slot detect pins see: www.beyondlogic.org/review-huawei-r4850g2-power-supply-53-5vdc-3kw/ (Assurez-vous que les broches de détection de fente sont connectées à neg. Également besoin d'une certaine charge sur la sortie DC. Il peut s'agir d'une charge légère d'environ 10k pour les tests. Pour les broches de détection d'emplacement, reportez-vous à la section)

[@abdulkareem-un5nk]

No it's not

[@abuabuahad1187]

SELL debo