Solution
The module can be programmed using just the SLSC driver in LabVIEW, although NI more generally expect users of this card to be using VeriStand instead of directly controlling it in LabVIEW.
To interact with the device, you will need to read and write properties on the card and execute commands using the standard SLSC API functions. For instance, you can use the Initialize Session VI to open a session to the desired device or physical channel, and then use the Set Device Property or Set Physical Channel Property VIs. There are numerous examples of basic SLSC communication in the Example Finder (Hardware Input and Output >> SLSC). Although these examples are not specific to the SET-1215, they provide a good starting point for using the SLSC API to manage property values.
To identify the properties you can set on the card, refer to the example Hardware Input and Output >> SLSC >> Basic Usage >> Show Command and Property Tree.vi. This example will display all available properties for the card, including their current values, data types, ranges, access types, and descriptions.