I had trouble to connect as well and the details from @perg67 did help me to get a connection with Putty.
I have PylonTec SC0500A-100S with four H48050.
Following was used:
- LogiLink AU0034 - USB 2.0-Adapter, USB-A to DB9 (RS232), active Adapter with Chipset: FT232+SP213
==> https://www.amazon.de/dp/B00ECJEPKQ/ref=pe_27091401_487024491_TE_item
The "FTDI" driver needs to be installed. Driver download:
http://www.logilink.de/download/driver/AU0034.zip
Note: my virus-scanner did warn about one of the older driver files: I have deleted those; you only need:
AU0034\Driver\Windows\CDM v2.12.28 WHQL
- RJ45 to RS232 Serial DB9 9-pin Adapter
==> https://www.amazon.de/dp/B0B67K84VZ/ref=pe_27091401_487024491_TE_item
For this RJ45 connector I have used an RJ45 to RJ45 adapter and another standard CAT5-cable, since I did not want to cut the cable of the "RJ45 to RS232".
The only wire that needs to be re-wired on the CAT5 cable with this adapter is:
(BMS-side) brown - white/blue (PC-side)
Since the command line interface with Putty is limited and the "BatteryView" program did not connect, I have written a tool to run on Windows.
It can be downloaded from here:
==> http://www.mmbsystems.de/download/MMBBatViewer.zip