You can find the possible scenarios for the installation of DS4 below:
http://service.sap.com/sap/support/notes/1603393
All scenarios require the BOE (aka. BIP) for the Data Services Installation.
You can choose to install the BOE and DS in the same server (scenario "All in One"), or separate them in two servers (other scenarios)
Note that You should install the DS EIM APS services on the BOE server and install DS Management Console on the BOE web tier if you choose to separate BOE and DS.
Gordon