Providing installation flexibility, with ten zones and 4 outputs on board, the expanders give a choice of zone wiring options. These include FSL with various resistor values and 2 wire or 4 wire CC for takeover of legacy systems. A host of installer friendly options are designed to save time on installation and service visits. These include: Decimal expansion system for more zones per expander. This also makes zone identification easier Semi-Automatic addressing makes addressing much simpler. No address duplication or lost address links Device locator to find any expander on the site by simply activating the buzzer inside the expander then walk the site listening for the buzzer EXP-W10: Ten wired zones with 4 outputs