The Transformer Advantage product family offers a variety of relay styles and options. Some choices are made when the Advantage is specified and ordered. Other choices are made during installation and setup.
Setpoint relays are used for control and alarm outputs. The number of relays is specified in the fourth digit of the part number. The most popular choice is 5 form C relays. For complex control and alarm schemes, up to 11 setpoint relays can be ordered.
Configuring_Advantage_Relays (pdf) describes the setup for various cooling control and alarm features in the Enhanced Transformer Advantage. Applies to units with AMT200 or higher firmware.