SilentKnight 5700 - Manual (Page 66)

Model 5700 Installation and Operation Manual 151295
5-3
5.3 Maximum Number of Devices
The 5700 supports SK or SD devices on one5700ystem. The maximum number of devices per system varies
depending on device protocol. Device support is as follows:
• SK Devices–A 5700 system can support a total of 50 SK detectors and 50 SK modules.
OR
• SD Devices–A 5700 system can support a total of 50 SD SLC detectors and modules, in any combination.
5.4 Wiring Requirements for SLC Devices
The following information applies to all SLC devices. Refer to the section that describes the type of device you
are installing for details.
5.4.1 Wiring SLC in Style 4 (Class B) Configuration
No special wire is required for addressable loops. The wire can be untwisted, unshielded, solid or stranded as
long as it meets the National Electric Code 760-51 requirements for power limited fire protective signaling
cables. Wire distances are computed using copper wire.
Maximum wiring resistance is 40 ohms for SK device and 50 ohms for SD devices.
Maximum loop length depends on the wire gauge.
Table 5-1 Maximum wiring distance for SK Modules
Table 5-2 Maximum wiring distance for SD Devices
Wire Gauge Max. Distance for SK
22 AWG 1200 feet
18 AWG 3100 feet
16 AWG 4900 feet
14 AWG 7900 feet
12 AWG 10,000 feet
Wire Gauge Max. Distance for SD
22 AWG 1500 feet
18 AWG 3900 feet
16 AWG 6200 feet
14 AWG 10,000 feet