| Terminal | Label | Typical Function | Wiring Notes | | :--- | :--- | :--- | :--- | | | AC | 16.5V AC Input | Connect to a dedicated 40VA transformer. Do not use DC here. | | 2 | AC | 16.5V AC Input (Return) | Polarity does not matter for AC terminals. | | 3 | BELL+ | Siren / Bell Positive | Provides 12VDC for external sounders (current limited). | | 4 | BELL- | Siren / Bell Negative | Common ground for alarm output. | | 5 | AUX+ | Auxiliary Power (12VDC) | For powering PIRs, glassbreaks, or keypads (rated ~500mA-1A). | | 6 | AUX- | Common Negative (Ground) | Reference ground for all DC devices. | | 7 | Z1 | Zone 1 Input (Normally Closed) | Loop to Aux- via contact or EOL resistor (1k–2.2k typical). | | 8 | Z2 | Zone 2 Input | Same configuration as Z1. | | 9 | T | Tip (Phone Line – Ringing side) | Connects to Telco’s Red/Green pair. | | 10 | R | Ring (Phone Line – Ground side) | Standard RJ31X jack wiring: Red to T, Green to R. | | 11 | T1 | Tip to Premises (House Phones) | Connects to the “Tip” side of internal house wiring. | | 12 | R1 | Ring to Premises | Connects to the “Ring” side of internal house wiring. | | 13 | PGM | Programmable Output | Switched ground for strobes, resetting smoke detectors, etc. | | 14 | GND | Earth Ground | Critical for lightning protection; connect to cold water pipe or ground rod. |
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