Zone Indicators A maximum of sixteen zones are possible: 6 on board, 12 on board with doubling and 16 with an additional expansion module. The indicators can blink (indicating an open sensor condition) or be on permanently (when the zone is violated) or be off, depending on the status or mode or operation of the system.

The SA-21 sensor is compatible with Rosslare’s hardwired control panels: AuraSys P-6 AuraSys L-2/K, L-4/K, L-6 and other third-party intrusion panels.