Tracopower tsp bfm24 buffer module for tsp series tracopower tsp bfm24 the tracopower tsp bfm24 buffer module will hold the output voltage of a 24v dc power supply after brown outs or voltage dips of ten 50hz cycles at full load during this buffer period no deterioration of the output voltage will occur this buffer module is an ideal alternative to a battery based backup system tracopower tsp bfm24 buffer module for tsp series