When you are given a suspended imposition of sentence is the charge or conviction on you record?

Normally yes. A conviction is any instance when a guilty or no contest plea is entered, or when the Defendant is found guilty by a judge or jury. That is known as an adjudication of guilt, which can be withheld. meaning there would be no record of guilt. But there would be a record that a plea was entered and a sentence was handed by the Court, albeit suspended.

Added: The above refers to the recorded actions of the court once the case reaches that stage of prosecution. Howeve, the record of your arrest, and for what charge, will remain.