It is a code inherent to the UPS communication protocol and can be found either on the plate on the back of the UPS itself or, for large UPS, inside the door of the UPS.
This code is essential to identify and associate the UPS or ATS/STS with our software, such as the PowerShield3, as well as connectivity devices like Netman 204.
Only with the correct PRTK code is communication between the two elements possible.