ExpressConnect for HANA DB provides direct communication between Replication Server and a replicate HANA database.
ExpressConnect for HANA DB, which is available with Replication Server 15.7.1 SP100 and later, eliminates the need for installing and setting up a separate gateway server, thereby improving performance and reducing the complexities of managing a replication system.
See the Replication Server Heterogeneous Replication Guide and the Replication Server Options documentation.