14 GWF-7075 Addressable Fire Alarm Control Panel Manual — P/N LS10147-002GF-E:E 06/11/2019
Installation Instructions Criteria Wiring Specifications
3.4 Wiring Specifications
Induced noise (transfer of electrical energy from one wire to another) can interfere with telephone communication or cause false alarms.
To avoid induced noise, follow these guidelines:
• Isolate input wiring from high current output and power wiring. Do not pull the one multi-conductor cable for the entire panel.
Instead, separate the wiring as follows:
• Do not pull wires from the different groups through the same conduit. If you must run the wires together, do so for as short a
distance as possible or use shielded cable. Connect the shield to earth ground at the panel. You must route high and low voltages
separately.
• Route the wiring around the inside perimeter of the cabinet. It should not cross the circuit board where it could induce noise into the
sensitive microelectronics or pick up unwanted RF noise from the high speed circuits. See Figure 3.1 for an example.
• 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 Wire Routing Example
High voltage AC power Terminals
SLC loops
Audio input/output Phone line circuits
Notification circuits NAC1 through NAC2
SBUS
Relay circuits
Table 3.2 Wiring Terms
NAC / Aux Power
Outputs
SBUS
SLC IN/OUT
Devices
Battery
Battery
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