All of Teltonika’s official MOLEX Micro-Fit PSUs contain undetachable cables, meaning that I’m forced to utilise an unbraided Micro-Fit cable, and a BS 1363 (IEC 60083 Type-G) socket.
This isn’t ideal for my conditions, because although I’ve a lot of spare USB-C PD sockets (Micro-Fit is DC), I’ve not many spare Type-G sockets.
Problem
Consequently, I asked Stack Exchange for a recommendation:
I received one that appeared perfect, in the PEPLINK ACW-791. (Two USB-C PD inputs to one MOLEX Micro-Fit output). However, at least when connected to a SATECHI ST-C200GM-UK, my RUTXR1 didn’t boot.
PEPLINK Support states that it should provide this:
The Micro-Fit connector will output the same voltage (either 12V or 15V) that it receives from the USB-C power source. It does not alter or regulate the voltage in between those values.
If the USB-C power source provides 12V, the Micro-Fit will output 12V.
If the USB-C power source provides 15V, the Micro-Fit will output 15V.
There is no capability to output a voltage between 12V and 15V; the output will match the input voltage exactly.
After informing them that this combination doesn’t work, they’ve directed me to ask Teltonika, because they don’t see a reason why the specifications would be incompatible, for the RUXR1 supports 9 to 50 V PSUs.
Location
Asking this Discourse instance appears more sensible than asking Teltonika directly, considering that I presume that a non-official PSU isn’t directly supported.
Thank you for your observations and for sharing your findings regarding your setup. I’ve forwarded all the necessary details to our electronics R&D team to clarify this behavior.
Once we receive any updates or feedback from them, I’ll make sure to inform you here accordingly.
After some further digging, it seems that the ACW-791 Molex Micro-Fit pinout differs from Teltonika’s 4-pin Molex PSU connector. On the ACW-791, the GND and V+ are located, let’s say, on pins 3 and 4, whereas our official PSUs use a different pin assignment. My guess is that this mismatch is the reason why your RUTXR1 does not boot when powered through the ACW-791.
For reference, here’s a related discussion on the Peplink forum that might be useful:
@anon65719490, thank you, sincerely! What excellent customer service. For anyone coming from Google, I’ve transferred the discussion to that Discourse instance instead: