ZAC-40 Siemens Zone Amplifier Card (40 Watt) The Zone-Amplifier Card (Model ZAC-40 Siemens) is a combination 40- Watt, amplifier/speaker zone for use with FireFinder XLS panels. Style Y, Z, or A / B1/2 speaker-zone wiring configurations are supported. Model ZAC-40 is power limited and can be configured to provide 40 Watts of audio at 25VRMS or 70VRMS. Model ZAC-40 is a plug-in card that mounts in a Model CC-5 or CC-2 card cage. Model ZAC-40 is capable of amplifying any of the (8) eight digital-audio channels that are transmitted from the Digital Audio Card (Model DAC-NET), via the digital-audio bus Audio Serial Interface (Model ASI). Model ZAC-40 amplifier is supervised for functionality. Model ZAC-40 can be used as a single, 40-Watt speaker zone for (1) one-to-eight (8) channel applications, or as a bulk amplifier for one-or-two-channel applications - feeding high level audio to Models ZIC-4A and ZIC-8B, or for single-channel applications - feeding high-level audio to Model HCP. Model ZAC-40 can also send audio to additional speaker zones, via the use of the Model EBA2004-A1 booster amplifier. The speaker lines are supervised for open, short-circuit and ground fault.