BOARD Connector for SAP is a middleware component to extract data from SAP systems and load it into BOARD. It has two components: Server and Designer.
The Server is responsible for the extraction. BOARD communicates with the Server, und this in turn with SAP. You use the Designer for the design and configuration of the extractions. The Designer directly communicates also with SAP, not to transport data, but just to query metadata during the design process.

Architecture-01

BOARD is a set of eight extraction types which make it possible to cover the entire range of demands placed on SAP data extraction:

Table accesses Tables and Views.

Query accesses queries (not to be mistaken with BEx queries which are supplied by BW Cube).

BAPI accesses BAPIs and RFC function modules.

BW Cube extracts data from SAP BW InfoCubes and BEx Queries.

Hierarchy extracts Hierarchies from an SAP BW / BI system.

Open Hub Service (OHS) extracts InfoSpokes and OHS destinations.

DeltaQ extracts DataSources (OLTP).

Report executes ABAP Reports.