SIlent Knight SKE-450 Voice Evacuation System Main Panel Replacement Board

The Silent Knight SKE-450 replacement board is a refurbished 50-watt voice-evacuation control module for existing SKE-450 systems. It integrates the digital message repeater, 50 W amplifier, and power-supply circuitry, supporting Class A or Class B speaker circuits at 25 VRMS (or 70.7 VRMS with the optional SKE-V70 converter). When activated by reverse-polarity or supervised dry-contact inputs, it plays up to three stored voice messages, two factory recorded (≤ 30 s) and one field programmable (≤ 45 s), providing clear, code-compliant evacuation instructions. This item is refurbished. Replacement board only; cabinet, microphone, zone splitters, and mounting hardware are not included. Key Specifications: Type: Voice-evacuation replacement board, 50 W amplifier Speaker Output: 50 W RMS @ 25 V (Class A/B); 70.7 V with SKE-V70 converter Alarm Inputs: 1 reverse-polarity and 1 supervised dry-contact Message Capacity: 3 total (2 × 30 s factory, 1 × 45 s field programmable) Primary Power: 120 VAC ± 10 % @ 60 Hz (requires existing transformer) Current Draw: 140 mA standby, 590 mA alarm (board only) Operating Environment: 32–120 °F (0–49 °C), 10–93 % RH non-condensing Compatible Modules & Accessories: SKE-V70 – 25 → 70.7 V speaker-line converter SKE-SRM – Supervised remote microphone for additional paging points