apu02 Cables

To connect the Moxa with my apus I had to customize the cables I got from aliexpress . 

 Till now I never had to create my custom serial console cable, so to me this was a new experience. 

 Finding the combination 

 I first had to find out the correct combination of cables since it did not work with these cables right away so I put a breadboard in between the cables.

 

To connect the wires to the breadboard I did crimp connectors to them.

 

For this I used a crimping tool and a set of connectors.

 

Then the fun started, based on the information from pcengines and from the Moxa CN2510 Manual about the expected wiring I tried to apply it to the existing cable. 

 Check the cable 

 I checked the wiring using a Fluke 115.

 

 Pin combinbations 

 Finally I had the correct wiring transferred to my cable. 

 For the RJ45 the Moxa needs the following wiring: 

 
 
 Pin 

 Collor 

 Signal Type 

 
 
 
 1 

 transparent 

 DSR 

 
 
 2 

 green 

 RTS 

 
 
 3 

 white 

 GND 

 
 
 4 

 orange 

 TxD 

 
 
 5 

 brown 

 RxD 

 
 
 6 

 red 

 DCD 

 
 
 7 

 blue 

 CTS 

 
 
 8 

 yellow 

 DTR 

 
 
 
 From the DB9 Connector these colors are assigend to the follwing Pins, the apu expects a wiring of a null modem cable. 

 
 
 Pin 

 Collor 

 Signal Type 

 
 
 
 1 

 brown 

 DCD 

 
 
 2 

 red 

 RxD 

 
 
 3 

 white 

 TxD 

 
 
 4 

 green 

 DTR 

 
 
 5 

 orange 

 GND 

 
 
 6 

 blue 

 DSR 

 
 
 7 

 transparent 

 RTS 

 
 
 8 

 yellow 

 CTS 

 
 
 
 The mapping 

 Based on this information I came up with the following mapping:

 

 
 
 Pin 

 Collor 

 
 
 
 1 

 blue 

 
 
 2 

 yellow 

 
 
 3 

 - 

 
 
 4 

 red 

 
 
 5 

 white 

 
 
 6 

 orange 

 
 
 7 

 transparent 

 
 
 8 

 green 

 
 
 
 The the RJ45 crimping tool came to use.

 

And the custom cable got produced.