ナブ (NABU) in Australia: Part 4 (Internal RS422-to-USB port installed)
19I finally sorted out the RS422-to-USB interface on my NABU and installed the USB socket on one of the NABU's back panels.
The trick for wiring the NABU's 5-pin DIN RS422 interface to the DTECH converter is as per @DJSures troubleshooting advice: positive-to-postive/negative-to-negative and receive-to-transmit/transmit-to-receive.
I had two issues with my initial wiring in the Part 3 video:
[1] I had connected to the DE9 pins 2 to 5 instead of pins 1 to 4, and
[2] I had connected receive-to-receive/transmit-to-transmit
Summary is - DIN connector in NABU to RS422-USB converter board with DE9 connector removed:
RS422 DIN pin 1 (TX+) -- DE9 pin 3
RS422 DIN pin 2 -- not connected
RS422 DIN pin 3 (RX-) -- DE9 pin 2
RS422 DIN pin 4 (TX-) -- DE9 pin 4
RS422 DIN pin 5 (RX+) -- DE9 pin 1
Once those were cleared up ... worked like a charm! Of course ... it's not a straight-through cable so obviously Rx needs to talk to Tx, etc.
Then I drilled a 12mmØ hole in one of the metal back plates, squared it up for the USB type B socket, followed by two 3mmØ holes for the securing screws.
Now to look at all the other fancy advancements that have been made for the NABU ... maybe the F18A replacement?
Other videos in this series:
https://www.youtube.com/playlist?list=PL5pwokf56wMJTQYB_1wF-esSweD6qrV0_