SILENT KNIGHT MODEL 5207

Compatible Product Installation
4.7 Model 5220 Direct Connect Module
The 5220 Direct Connect module can be used with the 5207 to meet NFPA 72 standards. The
5220 requires four connections to the 5207 and provides outputs for city box and polarity
reversal applications. The 5220 cannot be used for sprinkler supervisory.
The 5220 provides a current that reverses polarity during alarm or removes current during a
trouble condition.
4.7.1 City Box Connection
This section describes how to connect the 5207 to a municipal fire alarm box or "city box" as
required by NFPA 72 Auxiliary Protected Fire Alarm systems for fire alarm service. The city
(master) box is an enclosure that contains a manually operated transmitter used to send an
alarm to the municipal communication center which houses the central operating part of the
fire alarm system.
The maximum coil and wire resistance (combined) must not exceed 30 ohms.
To install the 5220 for city box connection:
1. Locate the knockout on the right side of the 5207 cabinet to connect the 5220 using a short
piece of conduit (must not exceed 20 feet in length).
2. Wire the 5220 to the 5207 as shown in Figure 4-7. This drawing also shows how to connect
the city box coil to terminals 3 and 4 on the 5220.
3. Select notification circuit #4 to be supervised (Step 5), but do not install an EOL resistor in
the notification circuit terminals. Do not select pulsing fire bells.
It is not possible to reset the remote indication until you clear the condition and reset the 5207.
Figure 4-7 City Box Connection
150865 4-7