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The Network UPS Tools repository. UPS management protocol Informational RFC 9271 published by IETF at https://www.rfc-editor.org/info/rfc9271 Please star NUT on GitHub, this helps with sponsorships!
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SMT750i cable? #2011

Open tonygh77 opened 1 year ago

tonygh77 commented 1 year ago

Hi, I found this compatibility for my UPS

_"Smart-UPS SMT/SMX/SURTD _Microlink models with RJ45 socket - they require AP9620 SmartSlot expansion card and smart cable"__

What does smart cable mean? a simple USB cable or a RS232 - USB cable? Many thanks for your time

jimklimov commented 1 year ago

Hello, good question. Currently googling for the "AP9620" comes up with https://www.apc.com/us/en/product/AP9620/legacy-communications-smartslot-card/ which per photo does not have an RJ45 socket, so either it is a different HW revision or I misunderstood that comment and see next paragraph :) AP9620-2023-SPD_SLIE-887HRT_FS_H_web

The description you pasted could however be read as the UPS itself having an RJ45 port (e.g. for serial over UTP cabling, possibly with uncommon wire layout and/or active signalling - APC did such tricks with plain serial cables back in the day). Then the card adding a DB-9 serial and an USB-A port makes sense - and the former may still need the special APC serial cable.

Overall this seems to match "microlink" commentary in the driver man page, see e.g. https://networkupstools.org/docs/man/apcsmart.html and FWIW lingering issue #139 about support for the protocol used in newer APC devices (allegedly their USB HID offering is also lackluster).

tonygh77 commented 1 year ago

Thank you for your reply I found the used board (AP9620) at a great price My ups should support this 'apcsmart' driver The driver page mentions this cable: 940-0024C This is a simple RS232 to RS232 cable I ask you another question: My nuc doesn't have a RS232 port, can I use a USB to RS232 adapter in addition to the RS232 + RS232 cable?

jimklimov commented 1 year ago

I think so, the computer-side expectation is of a standard serial/uart port - just the APC side (port+cable) are sprinkled with pixie dust. So the USB-serial dongle would be port=/dev/ttyUSB0 or similar on a Linux system, not sure about others but I think it would follow common COM port names (/dev/cuua, COM5 etc.)?...

tonygh77 commented 1 year ago

Perfect, I will buy everything and then I will update the discussion Thanks again for your welcome support