Block pvuc 24 24 20 ups buffer module 16 5 secs 24v dc 20a block pvuc 24 24 20 p the block pvuc 24 24 20 is a powerful and maintenance free ups buffer module that is able to compensate brief power supply failures power supply buffer times are extended and this increases the operational reliability of machines and systems in the event of a voltage dip the buffer modules ensure that the voltage supply to connected br consumers remains stable voltage dips can be compensated for up to 1 8