Product Overview

 The MDL3 Sync-Circuit Module is designed to synchronize SpectrAlert® Advance notification appliances. It coordinates strobe flashes at 1 Hz and temporal 3-coded horns and chimes over a single pair of wires. The module also allows selective silencing of horns or chimes on horn/strobe and chime/strobe combinations while keeping the strobes active. It supports both SpectrAlert and SpectrAlert Advance devices, providing flexibility for multi-zone installations by interconnecting “slave” inputs and outputs across modules. The MDL3 works with either two 3-amp Class B circuits or one 3-amp Class A circuit, and additional modules can be added as needed.

Key Features

• Two-wire operation from module to devices
• Silences horns and chimes over the same two-wire loop
• Synchronizes strobe flashes at 1 Hz
• Synchronizes horns and chimes to temporal 3 pattern
• Patented technology for multi-function control
• Interconnectable for multiple-zone synchronization
• Controls two Style Y (Class B) circuits or one Style Z (Class A) circuit
• New NAC slave feature for linking multiple modules over a supervised NAC loop