MIX-M500SAP Supervised Control Modules are intended for use in intelli- gent, two-wire systems, where the individual address of each module is se- lected using the built-in rotary decade switches. This module is used to switch an external power supply, which can be a DC power supply or an audio ampli- fier (up to 80 VRMS), to notification appliances. It also supervises the wiring to the connected loads and reports their status to the panel as NORMAL, OPEN, or SHORT CIRCUIT. The MIX-M500SAP has two pairs of output ter- mination points available for fault-tolerant wiring and a panel-controlled LED indicator.