SilentKnight SK-5208 Conventional FACP 10-30 Zone - Manual (Page 12)

Control Panel Installation 151204
3-2
false alarms. Avoid pulling one multiconductor cable for the entire panel. Instead, separate the wiring as follows:
DO NOT pull wires from different groups through the same conduit. If you must run them together, do so for as
short a distance as possible or use shielded cable. Connect the shield to earth ground at the panel only.
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 shield beads or by wrapping it around a ferrite toroid. Figure 3-1 provides an
example.
Figure 3-1 Wire Routing Example
1/4" spacing must be maintained
between each of these circuit types;
as well as between power limited
and non-power limited circuits.
Input/Output Type Wiring
High Voltage: AC power
Low Voltage: Annunciator, zone circuit wiring, and notification devices
Audio: Speaker
Telco Separated
Tel. Line
Aux Relays
NACs
SBUS devices
or
Annunciator
To Zone
To AC