The **FLM-C1-R** is an electronic component primarily used in fire alarm and detection systems. Specifically, it is a **Relay Module** designed for use with addressable fire alarm control panels (often associated with brands like Bosch). Below is a detailed breakdown of its electronic characteristics and specifications. --- ### 1. Functional Overview The FLM-C1-R serves as an interface between the fire alarm system's data loop and external equipment. It provides a dry contact relay output that can be programmed to trigger specific actions when the panel detects an event. ### 2. Technical Specifications | Feature | Specification | | :--- | :--- | | **Module Type** | Addressable Relay Module | | **Input Voltage (LSN)** | 15 V DC to 33 V DC | | **Max. Current Consumption** | Approx. 1.1 mA | | **Relay Contact Type** | Form C (Change-over) | | **Contact Rating** | 1 A at 30 V DC / 0.5 A at 125 V AC | | **Address Setting** | Rotary switches or Auto-addressing | | **Operating Temperature** | -20 °C to +50 °C | ### 3. Key Electronic Components #### A. LSN Interface (Local Security Network) The module communicates with the main control panel via an LSN bus. This interface handles: * **Data Transmission:** Receiving commands to toggle the relay. * **Power:** Drawing the small amount of current needed to operate the onboard logic. #### B. The Relay (Electromechanical) The core of the unit is a physical relay. * **Terminals:** It typically provides three terminals: **COM** (Common), **NC** (Normally Closed), and **NO** (Normally Open). * **Isolation:** The relay provides galvanic isolation, meaning the high-voltage/high-current circuit being switched is electrically separated from the sensitive fire alarm data loop. #### C. Addressing Mechanism Most versions feature **Rotary Switches** on the PCB. These allow the technician to manually set a unique decimal address (e.g., 001 to 254) so the control panel can identify and control that specific module. --- ### 4. Common Applications In an electronic system, the FLM-C1-R is used to control: * **Elevator Recall:** Sending a signal to the elevator controller to return to the ground floor. * **HVAC Shutdown:** Turning off fans to prevent the spread of smoke. * **Door Release:** Releasing magnetic door holders to close fire doors. * **Strobe/Siren Activation:** Triggering non-addressable notification appliances. ### 5. Wiring Diagram Logic The module generally has two sets of connections: 1. **LSN In/Out:** Connected to the fire panel signaling line circuit. 2. **Relay Output:** Connected to the external device power source and the device itself.