M-2 Auxiliary Output Card The Auxiliary Output Card adds eight assignable outputs that can be used to drive annunciator LEDs, relays or other similar devices. Individual Auxiliary Output Cards are plugged into the Expansion Backplane and up to 7 Auxiliary Output Cards can be used with each Expansion Backplane. Auxiliary Output Cards and Zone Expansion Cards can be freely intermixed on one or more Expansion Backplanes to provide the connection flexibility needed for complex fire detection and notification systems. 8 programmable circuits Programmable for general alarm or trouble, or specific zone alarm or trouble Used to drive annunciator LEDs, relays or similar devices