The Flex 402 is a two zone fire alarm control panel (FACP) and the Flex 404 is a four zone FACP. These control panels provide reliable fire signaling protection for small to medium sized retail, office, multi-family, or other similar commercial or institutional building. Initiating device circuits (IDCs) for Flex Series panels are power limited and operate in Style B (Class B). Each panel is compatible with conventional input devices such as twowire smoke detectors, four-wire smoke detectors, pull stations, water flow devices, tamper switches and other normally-open contact devices. This includes System Sensor