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How is the Alarm.com SEM for Honeywell Vista wired?

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Always make sure that the system is powered down to avoid any accidents. Then you will wire the GND on the SEM to terminal 4 on the Vista. Next Green goes to terminal 6. Then Yellow connects to terminal number 7. Finally the SEM comes with a red wire with an attached fuse and battery terminal connector. You’ll connect the +12V on the SEM directly to the positive (red) backup battery terminal. The connector will allow for the Vista panel to connect to the backup battery as well.