PowerShell: how to pass , as a string from command line to a powershell sciript

I have a powershell script Process-OU.ps1 to开发者_如何转开发 which I need to pass an argument -OU dc=LON,dc=NOM. How can this be done?

Like so:

 .\Process-OU.ps1 -OU "dc=LON,dc=NOM"