Silent Knight EVS-50W is a self-contained 50-watt distributed amplifier for the Silent Knight Emergency Voice System. Because it has its own power supply and battery backup, it can be located near the area it serves to cut down speaker wiring.
It connects to the EVS system with six wires, two for the voice bus and four for the SBUS, and can be installed up to 6,000 feet from the EVS-Series panel. Each amplifier is supervised by the main panel. Up to four EVS-50W amplifiers can be used on one system.
Specifications
| Audio power |
50 W at 25 Vrms or 70.7 Vrms (selectable) |
| Speaker circuits |
4 onboard, expandable to 8 with EVS-CE4 |
| Primary AC |
120 VAC, 60 Hz |
| Standby current |
85 mA at 25 Vrms; 100 mA at 70.7 Vrms |
| Alarm current |
525 mA at 25 Vrms; 580 mA at 70.7 Vrms |
| SBUS current |
10 mA standby and alarm |
| Battery charging |
7–35 AH; 18 AH max in cabinet |
| Overall size |
16.0 × 26.25 × 4.01 in., red |
| Temperature |
32 to 120°F, 10–93% RH non-condensing |
| Standards |
UL 864 10th Ed., UL 2572 2nd Ed., UL 1711; UL S2766, CSFM 7165-0559:0500, FDNY |
Installation notes
- Surface or flush mounting
- Six-conductor connection: two voice bus, four SBUS
- Use the RBB remote battery box for batteries larger than 18 AH, up to 35 AH
- Optional SK-SCK seismic compliance kit
- No special programming or separate dialer capture module required
Related models
The data sheet lists the 6820EVS as the host panel, and the EVS Series manual also covers the 5820XL-EVS. EVS-100W and EVS-125W are higher-power amplifiers in the same family.
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