5: Speaker Wiring - Honeywell SILENT KNIGHT EVS Series Manual

EVS Device Installation
High frequency noise, such as that produced by the inductive 2 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 4.12 provides an example.
AC power
4.3.5 Speaker Wiring
Each EVS-50W supplies four NAC (Notification Appliance Circuit) for speaker connection. The speaker circuit can be supervised and wired
Class B or Class A. The speaker circuit is capable of 50 watts of power at 25 Vrms or 70.7 Vrms.
Wiring Lengths
Number Of Speakers
@1/2 W
10
20
30
40
52
80
100
NOTE: The above table assumes a uniform distribution of the speakers, and that a max of 20% voltage drop on the last speaker is allowed
20
audio circuits
VBUS SBUS
– + – + – + A B
OUT IN SBUS
EVS-50W EVS-CE4
CIRCUIT 4 CIRCUIT 3 CIRCUIT 2 CIRCUIT 1
+ IN – + OUT – + IN – + OUT – + IN – + OUT – + IN – + OUT –
transformer
battery cable
Figure 4.12 Wire Routing Example for the EVS-50W
Total Load
@1 W Vrms
5 25Vrms
70Vrms
10 25Vrms
70Vrms
15 25Vrms
70Vrms
20 25Vrms
70Vrms
26 25Vrms
70Vrms
40 25Vrms
70Vrms
50 25Vrms
70Vrms
CIRCUIT 5 CIRCUIT 6
+ OUT – + IN – + O UT – + IN –
Maintain 0.25" spacing between
battery cables and input wiring.
CIRCUIT 8 CIRCUIT 7
+ OUT – + IN – + OUT – + IN –
audio
circuits
Watts 18 AWG
5W 3900
25000
10W 2125
15200
15W 1460
11000
20W 1100
8500
26W 760
6100
40W 550
4100
50W 450
3500
EVS Series Manual — P/N LS10062-001SK-E:D 3/15/2022
Use 1" spacer wire clamp
battery cables
provided to ensure 0.25"
spacing between power-limited
and non power-limited wiring.
1"
audio circuits
Wire Distance in Feet
16 AWG 14 AWG
6200 9860
39700 63200
3380 5375
24150 38400
2320 3690
17500 27800
1750 2780
13510 21500
1200 1920
9700 15400
875 1390
6500 10360
715 1130
5560 8850
Installing the EVS-50W
12 AWG
15680
100520
8540
61100
5870
44200
4420
34175
3050
24520
2200
16480
1800
14070