PASS & SEYMOUR / ELECTRICAL ACCESSORIES ELECTRICAL ACCESSORIES Low-Voltage Switching Components Application Legrand's Pass & Seymour Low-Voltage Remote Control Products consist of reliable, field-tested switching circuitry that provide central or local control of lighting loads throughout a building. These are best applied in institutions, schools, commercial buildings, warehouses and other installations where the ON-OFF switching of lighting is widely dispersed throughout the structures. Important: Low-Voltage Switching Components are specifically designed for switching incandescent and fluorescent lighting (non-HID) loads. Low-Voltage Switching Components are not to be used with any components supplied by other manufacturers. Misapplication or improper use may void product warranties. The ABCs of Low-Voltage Wiring and Components Relay A Blue (Common) Red (On) Black (Off) Load Basic Wiring Diagram B C Switch 120/277VAC 120/277VAC The low-voltage system differs from conventional switch wiring by actuating relays through the use of momentary contact switches. This type of switching utilizes a transformer to provide safe low-voltage current to control line voltage circuits. The wiring of lights and other electrical loads is installed in the conventional manner. The above illustration simplifies a low-voltage circuit with its basic components: A. Transformer - Converts line voltage to low-voltage.All low-voltage components operate using 24 volts furnished by the step-down transformer. Secondary output is 3-12A. B. Relay - The magnetic relay switches line voltage. A momentary 24 volt pulse energizes the " ON " or " OFF " coils to make or break line voltage contacts. C. Switches - Switches are momentary contact type used to energize either the " ON " or " OFF " coils of a relay. Momentary contact switches are normally open, single pole, double throw. WWW.LEGRAND.US/PASSANDSEYMOUR 557 ELECTRICAL ACCESSORIES INDEXhttp://WWW.LEGRAND.US/PASSANDSEYMOUR