The ATS624 offers a 4 relay output expansion to Advisor Advanced panels. To reduce required space in the Main control panel housing, the unit is a plug-in to the Main Control panel PCB. The ATS624 provides for 4 outputs available through screw terminals, all supporting a 1A relay. In addition it provides an extension to connect 4 additional relays when using ATS1810, 4-way relay cards. The output function is defined through the output configuration in the main control panel.