The **FLM-0G-R** is an electronic component primarily used in fire alarm systems. Specifically, it is a **Relay Module** (Form C) designed for addressable fire alarm control panels, often associated with Bosch or similar fire safety ecosystems. --- ### 1. Technical Specifications The following table outlines the primary electrical and physical characteristics of the FLM-0G-R: | Feature | Specification | | :--- | :--- | | **Component Type** | Relay Module (Addressable) | | **Contact Type** | Form C (Normally Open / Normally Closed) | | **Maximum Contact Rating** | 2.0 A @ 30 VDC | | **Operating Voltage** | 15 VDC to 33 VDC | | **Current Consumption** | < 0.2 mA (Standby) | | **Protection Category** | IP 30 | | **Operating Temperature** | -20°C to +50°C | --- ### 2. Core Electronic Functions The module acts as an interface between the low-voltage signaling loop and high-power external equipment. * **Addressability:** Each unit contains an integrated circuit that allows the main fire panel to communicate with it individually via a unique address (usually set via rotary switches). * **Isolation:** The relay provides galvanic isolation between the fire panel's signaling line circuit (SLC) and the device being controlled. * **Switching Capability:** It is used to trigger external hardware such as: * Door holders (releasing magnetic locks). * Elevator recall systems. * HVAC fan shutdown. * External sirens or strobe lights. --- ### 3. Connection Layout The wiring typically involves two distinct circuits: 1. **Bus Connection:** Connected to the fire panel loop (LSN - Local Security Network). 2. **Output Terminals:** * **COM:** Common. * **NO:** Normally Open (closes upon activation). * **NC:** Normally Closed (opens upon activation). --- ### 4. Code Implementation (Logic Simulation) In a modern fire panel, the logic for triggering this relay would look conceptually like this: ```python class FireRelayModule: def __init__(self, address): self.address = address self.state = "IDLE" # IDLE, ACTIVE, FAULT def trigger_relay(self, command): if command == "ALARM": self.state = "ACTIVE" print(f"Relay {self.address}: Contacts Switched (Circuit Closed/Opened)") else: self.state = "IDLE" # Example: Panel detects fire and sends signal to FLM-0G-R at address 105 module_105 = FireRelayModule(105) module_105.trigger_relay("ALARM") ```