In this case, connected is acting as a noun, but a noun for a category. You can think of it as being attached to environment. It might be rephrased as
"In any environment, from connected to cloud, this scanner series is easy to setup and integrate."
That's not perfectly synonymous as it misses some nuance, but it makes the grammar clearer. Connected and cloud are both adjectives, sharing the same implicit noun to allow them each to function as noun phrases.
Given the proximity to cloud, it may be a reference to connected computing.