To connect a Windows PC via RS485 to an Aries servo drive, B&B Electronics (www.bb-elec.com) makes a 485BAT3 RS232 to 422/485 converter.
From a 9pin COM port (or USB to RS232 adapter), connect straight through 9pin cable to the 485BAT3.
From the 485BAT3 for 2wire communication:
TD (B+) tied to RD(B+) goes to pin 25 on Aries,
TD (A-) tied to RD(A-) goes to pin 26 on Aries,
GND goes to pin 24 on Aries
Switches: echo OFF, 485
Must cycle power with this connected for the Aries to power-up and detect RS485 communication.
For new Aries drive after 3.32 firmware, change RSMODE from 1 (RS232) to RSMODE0 (Auto detection) via an RS232 communication connection first and cycle power.