The **SVB-HFW-R** is a specialized wireless fire alarm interface module, typically associated with Hyfire or similar wireless fire protection systems. It functions as a "Wireless Conventional Interface," allowing wireless devices to communicate with a hardwired conventional fire alarm control panel. --- ### Core Electronic Components and Specifications The SVB-HFW-R acts as a bridge. Below is a breakdown of its primary electronic characteristics: | Component/Feature | Description | | :--- | :--- | | **Microcontroller** | Central processor that manages wireless protocols and signal conversion to relay outputs. | | **RF Transceiver** | Operates typically in the **868 MHz** or **916 MHz** frequency bands (region dependent). | | **Antenna System** | Internal dual-antenna design to ensure signal diversity and link reliability. | | **Relay Contacts** | Includes physical relay outputs (Alarm and Fault) for integration with the panel's zones. | | **Power Input** | Usually requires a 12V - 27V DC power supply from the host panel or an external EN54-4 source. | --- ### Key Technical Functionality #### 1. Signal Processing The module receives encrypted digital signals from wireless detectors (smoke, heat, or call points). The internal electronics decrypt these signals and trigger the onboard **Fire** or **Fault** relays to change state, simulating a traditional wired device to the control panel. #### 2. Bi-Directional Communication Unlike simple transmitters, the SVB-HFW-R uses **bi-directional** electronic communication. This allows the interface to: * Acknowledge signals from sensors. * Monitor battery levels of remote devices. * Perform periodic "heartbeat" checks to ensure the link is active. #### 3. Power Management The electronic circuitry is designed for low power consumption to minimize the load on the fire panel’s auxiliary power supply, while maintaining high sensitivity for radio reception. --- ### Wiring Interface Diagram (Conceptual) ```yaml Terminal Block Connectors: [ + - ] -> 24V DC Power Input [ ALM ] -> Alarm Relay (Connects to Conventional Zone) [ FLT ] -> Fault Relay (Connects to Panel Fault Input) ``` ### Environmental and Compliance Data * **Protocol:** Proprietary wireless mesh or star topology. * **Range:** Approximately 200m in open air (varies based on building materials). * **Standards:** Built to comply with **EN54-25** (the European standard for wireless fire systems) and **EN54-18**. ---