I want to connect ATEN UPS to SN01xxCO for remote access, how can I configure?

ATEN UPS with DB9 female connector, with baud rate 2400, 8, N, 1

You can use Cisco console cable or a network cable to connect SN01xxCO and ATEN UPS:

1. Cisco console cable: 

SN01xxCO--RJ45--DB9 female--gender changer--DB9 of UPS

2. Network cable

SN01xxCO--RJ45--Network cable--SA0142(male)--DB9 of UPS