PS3500 power supplies have a modular design and selectable wiring configurations including N+1 redundant mode. These 24 Vdc, 15 A modules plug directly into a three- or six-position chassis/backplane for maximum capacity of 45 A or 90 A, respectively. The devices have external field connectors, LEDs and alarm outputs for quick diagnostic evaluation and natural convection cooling. They are certified for Class I, Div. 2/Zone 2 ATEX Zone 2 mounting.