Can an amplifier in Simulink receive its input from a workspace variable?

I am trying to model an amplifier using the Amplifier block in Simulink. I am familiar with driving the amplifier using a signal generator, but can I import an arbitrary waveform from the workspace to use as the amplifier input?

I have used the "from workspace" block before, but I am unable to connect it to the amplifier block in my model (a red line appears when I try to connect the "from workspace" to "Amplifier" block).