In your photo, the Orange cables appear brown, but that could be just the image.
Some Items to check:
1. Cable pinouts correct.
2. Good crimp on the RJ45 end.
3. Plugged into the correct port of the Renard SS24.
4. Jumper set to accept RS-485 on the Renard.
5. The USB adaptor actually installed correctly under Device Manager.
6. Data rate set correctly on the COM port.
7. You can also validate basic adaptor functionality by measuring appx 6 VDC between Pin 1/2 and pin 5 of the RJ45 end or TX+ and GND on the adapter.
Without a manufacture/model identity of the USB-to-RS485 I am assuming the following:
Pin 1 -> TX+
Pin 2 -> TX-
Pin 3 -> RX+
Pin 4 -> RX-
Pin 5 -> GND
RS-485 End --->
Wire Color --------->
RJ-45 Pin
Pin 1 -> TX+
--->White Blue----------->Pin 5
Pin 2 -> TX- ---->Blue ----------------->Pin 4
Pin 3 -> RX+
Pin 4 -> RX-
Pin 5 -> GND --->Orange ------------->Pin 2
Pin 5 -> GND --->White Orange ------>Pin 1
Pictured Here
-Tony