SILENT KNIGHT MODEL 5207

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Section 4 Compatible Product Installation This manual refers to fire zone types using the latest NFPA standard designations. Refer to the NFPA 72 National Fire Alarm Code, 1993 Edition for additional information. Note: For purposes of this manual, a normally open deviceís contacts conduct when in an alarm state and do not conduct in a non-alarm state. 4.1 Class A (Style D) Zones Zones 1 and 2 are class A (style D) zones. They are intended for use with non-powered devices such as waterflow switches. Do NOT use smoke or duct detectors on Class A zones. Each class A zone is a four-wire circuit that allows an alarm to be detected even after a single open or ground fault occurs. When a single open or ground fault occurs, the audible trouble signal will sound and the 5207 will report the trouble to the central station (if programmed to report troubles). Figure 4-1 shows how to wire a class A (style D) loop. No end-of-line (EOL) resistors are needed for these zones. These zones must be wired using normally open contacts. Figure 4-1 Class A (style D) Supervised Fire Loop (Normally Open Sensors Only) 150865 4-1
Model 5207 Installation and Operation Manual 4.2 Class B (Style A) Zones Zones 3 through 8 are class B (style A) fire zones. Each class B zone consists of a two-wire circuit that will detect the occurrence of an open in the loop, but may not be able to detect an alarm after such an occurrence. The detection of an open will cause the audible trouble signal to sound and the 5207 will report the trouble to the central station (if programmed to do so). Figure 4-2 shows how to wire a class B (style A) loop. One side of each class B loop connects to a zone input terminal and the other side of each loop connects to loop power. For each loop, use a 4.7K-ohm EOL resistor wired in parallel with the normally open contact farthest from the panel. 4.7 K EOL 4.7 K EOL 4.7 K EOL 4.7 K EOL 4.7 K EOL 4.7 K EOL 11 12 13 14 15 16 17 18 19 20 Zone 3 Input Loop Power Zone 4 Input Zone 5 Input Loop Power Zone 6 Input Zone 7 Input Loop Power Zone 8 Input Circuit Ground Figure 4-2 Model 5207 Class B (style A) Loops Maximum Loop Resistance - 30 ohms Maximum Total alarm current for all class B (style A) zones - 1 A Maximum Standby Current per Zone: 24V system - 2.0 mA Note: UL requires all wiring to be at least 18 gauge. 4-2 150865
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SILENT KNIGHT MODEL 5207

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