This depends on the ren value of each device and the REN capacity of the ring gen , check with support docs for the ring gen , the alog devices should have the ren value on the serial number sticker , then simply add the ren up and see if you are ok , i have experienced it where you can go 2-3 ren above the capacity of the ring gen and all works ok.
APSS (SME)
ACSS (SME)
ACIS (UC)