Access Controls breaks the field of limited energy into bite size pieces and explains each one:

1. The three different types of input to a control system for gaining access,
2. The way different types of controls operate,
3. The different types or REXs used and
4. The different audit trails that are used in today’s access world.

There is a course manual to download in PDF form prior to taking the course, you should also have a copy of the current NEC (NFPA 70).