The Apollo 55000-818 Interface Unit has now been made obsolete.  This unit was a surface mounted single input / output module designed for use on addressable fire alarm system circuits.
Apollo 55000-818 Interface Replacement

Apollo's suggested replacement unit for the 55000-818 device is the 55000-847 unit.  This is an addressable single input / output interface unit with integral isolator.  Click Here To View The Apollo 55000-847 interface.

If you would like more information then please contact us. Thank you for reading this blog article on the Safety Centre website. Our blog posts discuss many health and safety issues, products such as Fire alarms and extinguishers, safety technology and wider industry news. You can view our blogs here.