The **FLM-CF-R** is an electronic component primarily used in fire alarm systems. Specifically, it is a **Relay Contact Module** manufactured by Bosch. It is designed to provide a dry contact output for controlling external equipment via a fire alarm control panel (FACP). --- ### 1. Key Technical Specifications | Feature | Specification | | :--- | :--- | | **Operating Voltage** | 24 VDC (Nominal) | | **Current Consumption** | < 1.0 mA (Standby/Alarm) | | **Contact Rating** | 2.0 A @ 30 VDC or 0.5 A @ 125 VAC | | **Wiring** | 2-wire SLC (Signaling Line Circuit) | | **Installation** | Fits in a standard 4-inch square backbox | | **Operating Temperature** | 32°F to 120°F (0°C to 49°C) | --- ### 2. Electronic Functionality The FLM-CF-R acts as an addressable interface. Its internal electronics handle two primary tasks: 1. **Communication:** It uses a specialized Integrated Circuit (IC) to communicate with the Fire Alarm Control Panel using a digital protocol. The panel assigns a unique address to the module. 2. **Actuation:** When the panel sends a "trigger" command, the module energizes an internal **Electromechanical Relay**. This flips the state of the physical contacts (Form C). ### 3. Contact Configuration (Form C) The module features a "Form C" relay, which includes three connection points: * **Common (C):** The shared terminal. * **Normally Open (NO):** Closes when the module is activated. * **Normally Closed (NC):** Opens when the module is activated. --- ### 4. Common Applications In a building's electronic safety infrastructure, the FLM-CF-R is typically used to interface with: * **HVAC Systems:** Shutting down fans to prevent smoke spread. * **Elevator Recall:** Sending a signal to elevators to return to the ground floor. * **Door Holders:** Releasing electromagnetic door holders to close fire doors. * **Security Systems:** Unlocking electronic access control locks during an emergency. --- ### 5. Programming and Addressing The module features **Rotary Switches** on the front or side of the unit. These are used to set the decimal address (01–254 depending on the panel) so the control system can identify which specific relay to trigger during an event. ---