First Alert VISTAHEXPHW VISTA H Zone Expansion Module Spy camera Transformerless preamplifier circuitry improves linearity

Transformerless preamplifier circuitry improves linearity across the full frequency range

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This is accomplished by minimizing frequencies caused by noise

This is helpful for powering line powered devices such as touch tone dialers and emergency phones on low voltage and/or low loop current extensions

Additional 9th button can be used to activate an optional MMF-300 monitor module installed inside the cabinet for applications such as HVAC shutdown

First Alert VISTAHEXPHW VISTA H Zone Expansion Module Spy camera Transformerless preamplifier circuitry improves linearityProduct Overview The VISTAHEXPHW hardwired zone expansion module allows you to add 8 additional hardwired zones (16 with zone doubling) per module to a VISTAH system. The module has a built in tamper allowing detection and reporting if the front cover is removed and is supervised so if the wiring is cut a supervision alarm will result indicating the module may not be operational. The flexibility to mount the module on a surface wall or to a gang box