The internal PCB contains several terminals for power, triggers, and monitoring:
The is a high-specification external siren sounder bell box designed specifically for ADT alarm systems . It is a Security Grade 3 device typically used in installations requiring high levels of security protection. Key Technical Specifications
If the siren sounds immediately upon power-up, ensure the lid is properly seated and the rear tamper plunger is firmly against the mounting surface. Official Manuals and Support
Selectable/Built-in (Common variations include 4k7/2k2 or 1k/1k)
Based on the information provided in the Elmdene 7422-SFG-G3F manual, we recommend the following: elmdene 7422-sfg-g3f manual
: Twin alternating "Comfort LEDs" to signal an active system, paired with a high-efficiency strobe light.
Understanding the technical limits ensures system stability and prevents hardware damage. : 230V AC at 50Hz Output Voltage : 13.8V DC nominal Current Rating : 2.0A continuous load Security Grade : Grade 3, Environmental Class II
After input activation, the output relay remains energised even if the input signal returns to normal. To reset:
⚠️ This document is a synthesis based on publicly available information for similar Elmdene devices. For the exact official manual, please check the product packaging or request direct from Elmdene as model-specific details may vary with revision. The internal PCB contains several terminals for power,
The sounder often uses "clicks" or LED flashes for local diagnostics during installation: Single Click:
Feed your shielded alarm cable through the rear rubber grommet entry point.
: Provides comprehensive connection and testing information for the 7422 and related high-security contacts/sounders. Elmdene Downloads Page
Use a multimeter to find the Normally Closed (N.C.) pair when the magnet is not present; this is your tamper circuit. To reset: ⚠️ This document is a synthesis
Configure jumpers if applicable to choose between pulsed or steady strobe, or to set sounder duration.
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The Elmdene 7422-SFG-G3F is a reliable, "fit-and-forget" power supply. Its switched-mode design makes it lighter and more efficient than older transformer-based units, and its compliance with EN50131 makes it suitable for graded security systems.