Feature | SP4000 | SP5500 | SP6000 | SP65 | SP7000 | On-board Zones | 4 (8w/ATZ) | 5 (10w/ATZ) | 8 (16w/ATZ) | 9 (18w/ATZ) | 16 (32w/ATZ) | On-board PGMs | 1 | 2 | 2+2* | 3 | 4 | Alarm Relay | - | - | 1* | - | 1 | PGM +/- Trigger | - | - | ![](https://www.paradox.com/images/misc/check_gray.gif) | (via BabyWare) | ![](https://www.paradox.com/images/misc/check_gray.gif) | 2-Wire Smoke Detector Input | - | - | ![](https://www.paradox.com/images/misc/check_gray.gif) | - | ![](https://www.paradox.com/images/misc/check_gray.gif) | Switching Power Supply | 1.1A | 1.1A | 1.5A | 1.1A | 1.5A |
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