The PowerShell plug-in relies on a number of components to function properly.
vRealize Orchestrator and Windows PowerShell provide the platform for the plug-in, and the plug-in provides interaction between those products. The PowerShell plug-in can also interact with other components, such as vCenter Server and vSphere PowerCLI.
The plug-in can communicate with Windows PowerShell through the OpenSSH and WinRM communication protocols. See Configuring WinRM.
Optionally, you can integrate the PowerShell plug-in with vSphere PowerCLI and vCenter Server. See PowerCLI Integration with the PowerShell Plug-In.