Mariu,
EP2 Standard does not have Task Events, which is the much superior way to handle sending signals/marker/triggers to external equipment such as Biopac.
EP2 Standard does, however, still include WritePort, as well as the OnsetSignal, etc., facilities. Not as nice as Task Events, but these might make it possible to communicate with external equipment. In fact, you could even use these facilities with good old EP1.
-- David McFarlane