Eltek H1250A power rectifier communication?

Batteries, Chargers, and Battery Management Systems.
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Mouse   1 mW

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Posts: 16
Joined: Jul 02 2020 8:02am

Eltek H1250A power rectifier communication?

Post by Mouse » Jan 27 2021 6:04am

Hi has anyone managed to communicate with the older Eltek H1250A power rectifiers?
Or even have any links or ideas about how to communicate with them to set voltage or current etc...?
They use a SPI interface unlike the newer CAN connected Flatpack2 HE ones and I cant find any specific SPI info at the moment but maybe I'm looking in the wrong places.
With a 42-56V @ 25A output in a 1RU format is still very compact and useful charger if I can get them to work as I've got a couple of them

I found a spec sheet,
(147.69 KiB) Downloaded 14 times
The pinout is connector details listing SDA and SCL.
H1250a-connector.jpg (100.3 KiB) Viewed 209 times
And the wording in the spec sheet suggesting there is a generic Eltek communication protocol
"The rectifiers communicate via the proprietary Eltek Valere Communication Protocol."
coms-bus-SCL-SDA.png (69.12 KiB) Viewed 209 times

CrankyOldGuy   1 µW

1 µW
Posts: 1
Joined: Apr 06 2021 9:23am

Re: Eltek H1250A power rectifier communication?

Post by CrankyOldGuy » Apr 06 2021 10:49am

I am also looking for communication/programming info for the older Eltek Valere rectifier. My model is the H2500A2. If you haven't seen it, there is a great thread "ULtra Compact 1800W charger + Eltek programming" that addresses the newer models here: viewtopic.php?f=14&t=71139

I contacted Eltek support, the guy provided the two attached documents.

This is the product label on my supply.
ELTEK FP2 LABEL.JPG (33.82 KiB) Viewed 42 times
My application is to use the supply to feed a solid state power amp for ham radio. A once and done permanent change to set the output voltage is what I'm looking for.
ELTEK VALERE H2500A2 Datasheet.pdf
(1 MiB) Downloaded 1 time
ELTEK Val H2500A2vv.pdf
(864.49 KiB) Downloaded 1 time

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