Silent Knight EVS-125W is an intelligent 125 W amplifier for the Silent Knight 5820XL-EVS and 6820EVS emergency voice evacuation panels. It amplifies the audio message for distribution throughout the facility.
It is a self-contained distributed amplifier with its own power supply and battery backup, so it can be located near the area of protection to reduce wiring. Up to four EVS-125W amplifiers can be used on one voice evacuation system, each addressed on the SBUS and fully supervised by the main panel for trouble conditions. The amplifier connects to the EVS system with six wires: two for the voice bus and four for the SBUS.
Specifications
| Total power |
125 W at 25 VRMS |
| Speaker circuits |
Four on board, expandable to eight with the EVS-CE4 |
| Circuit ratings |
Circuit 1 rated 100 W; circuits 2 to 8 rated 50 W each |
| Primary AC |
120 VAC at 60 Hz |
| Standby current |
375 mA |
| Alarm current |
700 mA |
| Main panel SBUS current |
10 mA standby and alarm |
| Battery charging capacity |
7 to 35 AH |
| Battery size in cabinet |
18 AH maximum; use the RBB accessory cabinet for batteries up to 35 AH |
| Voice integration wiring |
Six conductor: two voice bus, four SBUS |
| Flush mount dimensions |
14.5 in. W x 24.75 in. H x 3.4 in. D (36.8 x 62.9 x 8.7 cm) |
| Overall dimensions |
16 in. W x 26.25 in. H x 4.1 in. D (40.6 x 66.7 x 10.5 cm) |
| Operating temperature |
32°F to 120°F (0°C to 49°C) |
| Humidity |
10% to 93% non-condensing |
| Standards |
UL 864 and UL 2572 |
| Compatible panels |
6820EVS and 5820XL-EVS |
Installation notes
- The cabinet can be surface or flush mounted.
- Up to four EVS-125W amplifiers are supported per system on the SBUS.
- The EVS-CE4 adds speaker circuits 5 to 8 (50 W each) and connects to the amplifier with a wire harness.
- Batteries larger than 18 AH do not fit the amplifier cabinet: use the RBB (up to 35 AH) or the AB55 (up to 55 AH) remote battery box.
Related models
-
EVS-CE4 — adds four audio circuits to the EVS-125W
-
RBB — remote battery box accessory cabinet for batteries up to 35 AH
-
6820EVS / 5820XL-EVS — the Silent Knight voice evacuation panels this amplifier serves
Specifications taken from the Silent Knight data sheet "EVS-125W Intelligent 125 Watt Amplifier," document 350606. Manufacturer specifications are subject to change without notice.
Documents
FAQ
Which panels is the EVS-125W compatible with?
The Silent Knight 6820EVS and 5820XL-EVS addressable fire alarm control panels with emergency voice.
How many EVS-125W amplifiers can one system use?
Up to four EVS-125W amplifiers per system, each SBUS addressable and supervised by the main panel.
How many speaker circuits does it have?
Four on-board speaker circuits, expandable to eight with the optional EVS-CE4. Circuit 1 is rated 100 W and circuits 2 to 8 are rated 50 W each, for 125 W total at 25 VRMS.
What batteries does it need?
It has its own power supply and charger for 7 to 35 AH batteries. Up to 18 AH fits in the cabinet; larger batteries go in the RBB remote battery box.
