SilentKnight EVS - Manual (Page 50)

EVS Series Emergency Voice System Installation Manual
4-28 LS10062-001-SK-E
High frequency noise, such as that produced by the inductive reactance of a speaker
or bell, can also be reduced by running the wire through ferrite beads or by wrapping
it around a ferrite toroid core. Figure 4-27 provides an example.
Figure 4-27 Wire Routing Example for EVS-125W
4.6.4 Speaker Wiring
Each EVS-125W supplies four NAC (Notification Appliance Circuit) for speaker
connection. The speaker circuit can be supervised and wired Class B (Style Y) or
Class A (Style Z). Speaker circuit 1 is capable of 100 watts of power at 25 Vrms.
Speaker circuit 2-4 are capable of 50 watts (each) at 25 Vrms.
To AC VBUS
In & Out
SBUS
Audio
Circuits
Audio Circuits
Audio
Circuits
Battery Connection
EVS-CE4