50
ECS Series Manual —
P/N LS10262-001FK-E:A 3/3/2021
Device Installation
Installing the FIK-DUAL50W
DO NOT pull wires from different groups through the same conduit.
Twisted, shielded wire is recommended for all audio circuits to provide the maximum protection against EMI and AFI emission and suscep-
tibility.
If using shielded cable, attach the shield to earth ground on the control panel.
For the same reasons, wiring within the cabinet should be routed around the perimeter of the cabinet. It should not cross the printed circuit
board where it could induce noise into the sensitive microelectronics or pick up unwanted RF noise from the high speed circuits.
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. See Figure 4.45.
Figure 4.45 Wire Routing Example for FIK-DUAL50W
4.7.5 Speaker Wiring
Each FIK-DUAL50W supplies eight NAC (Notification Appliance Circuit) for speaker connection. The speaker circuit can be supervised
and wired Class B or Class A. The speaker circuits are capable of 50 watts (each) at 25 Vrms or 70.7 Vrms.
NOTE:
Ground Fault Impedance to any Terminal is 0
Ω.
