Simplex 4090-9001 Monitor Module

The Simplex 4090-9001 Monitor Module allows dry contact input devices to be connected directly to an IDNet addressable fire alarm loop. Designed for reliable contact monitoring, it supervises Class B (Style B) initiating device circuits (IDC) using an end-of-line resistor to detect normal, open-circuit, and alarm conditions from field contacts like waterflow switches, tamper switches, and conventional call points. Powered directly from the IDNet channel with a single device address, it features a compact, dust-resistant housing that mounts conveniently in standard 4-inch square electrical boxes. An onboard LED indicator flashes to confirm communications with the panel, providing a durable and efficient solution for integrating conventional inputs into Simplex addressable fire systems.