A Collector is the place you get data from. The OPC Data Logger has been designed to allow any number of Collectors. The current version of the Data Logger supports OPC DA 2.x and OPC UA that supports the OPC DA profile. The design gives it room for future expansion of data sources. 

Please see the links below with screen shots of how to configure each type of collector.

How to Configure an OPC DA Collector

How to Configure an OPC UA Collector