Hello Pallavi,
Yes there is a separate update site for SAP Operational Process Intelligence. Here is the URL template for the update site : http://<host>:80<instance>/sap/opi/pv/updatesite
You have install OpInt Plugins (- these plugins are eclipse based -) using this updatesite.
Please refer the developer's guide (-section 2.1-) for the same
http://help.sap.com/saphelp_hana_opint/SAP_OPInt_Developers_Guide.pdf
Regards,
Archana