MODEL 5204 - Silent Knight

Model 5204 Fire Control/Communicator Installation Manual2.3 Wiring SpecificationsTo avoid induced noise (transfer of electrical energy from one wire to another), keep inputwiring isolated from high current output and power wiring. Induced noise can interfere withtelephone communication or even cause false alarms. Avoid pulling one multiconductorcable for the entire panel. Instead, separate the wiring as follows:High current input/output:Low current input/output:Audio input/output:AC power, speaker, and notification device wiringAnnunciator and zone loop wiringTelephone wiringDO NOT pull wires from different groups through the same conduit. If you must run themtogether, do so for as short a distance as possible or use shielded cable. Connect the shield tocircuit ground at the panel. You must route high and low voltages separately.For the same reasons, you should route the wiring within the cabinet around the perimeter ofthe cabinet. It should not cross the printed circuit board where it could induce noise into thesensitive 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 arounda ferrite toroid. See Figure 2-1.Figure 2-1 Wiring Identification2-2 150644