The C3RY-16 is a 3-Series control card that provides sixteen low-voltage relay closures. Each individual relay is rated 1 Amp at 30 Volts, and each group of eight relays is referenced to a shared floating common. The card is designed to install in a control card expansion slot of a 3-Series Control System model PRO3 or AV3, or 3-Series Card Interface model CEN-CI3-1 or CEN-CI3-3.