The PAD-4-MB is the main board for Siemens' PAD-4 Distributed Power Supply Unit, designed to expand and manage power-limited notification appliance circuits (NACs) in fire safety systems. This unit supports up to four Class B or Class A NACs and provides up to 3 Amps of auxiliary power. Featuring advanced microprocessor control, battery supervision, and ground-fault detection, the PAD-4-MB ensures reliable, continuous power to signaling devices. It is UL 864 9th Edition Listed and supports both synchronized strobe outputs and coded audible signals. Ideal for enhancing fire alarm control panels, the PAD-4-MB is perfect for both large-scale commercial and industrial applications requiring efficient and scalable fire safety solutions.
