the sampler does not have a “trigger” input to load samples, if that is what you mean.
loading is done by manually choosing the sample in the list of samples on the P-page, and pressing the first encoder.
so yes, you load your samples into the sampler module and then you can switch between them. you can have as many sampler modules as you want in the grid and each module can load 8 samples.
the samples can have up to 8 channels each and you can play them in normal or multichannel mode (use the MCh toggle button). Multichannel mode means that the channels of the loaded samples are summed while normal mode means only the first channel of each loaded sample is used.