Raj, 

PSIT takes admission through Jee rank,  UPSEE as well as board percentage.

• If you have scored above 65% in 12th you will definitely get admission in PSIT.
• if you have cleared the cut off in jee mains yiu can get admission in PSIT in whatever course you want.  And by chance your rank is below 50K you will treated cordially by them. 
• They take admission through UPSEE you just need to clear the cut off. 
• You also get scholarship based upon UPSEE and board percentage. 

The main thing is you can get admission in PSIT,  no need to just guve them a call that you want to take admission there. 

Hope it HELPS!!!