Johnson Controls FIRE-MON-17, Техническое руководство

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IFC Networking—Metasys Intelligent Fire Network 15
When designing the wiring layout of a FN system, you need to develop a
plan for the entire network that best suits your facility and that complies
with the NFPA 72 standards, the UL 864 Listing, and local codes. There
are specific distance limitations on the FN system communication path
length and circuit segment lengths that relate to the type of configuration,
media, and connections you choose.
This section explains the types of configuration, communication media,
media interface boards, and connections that are available, and shows the
distance limitations you have to work with. Terminating resistors and
ground fault detection on wire systems is also covered. In addition, the
Installation Procedures section details how to connect each FN node to
the FN.
To make sure the FN is functioning properly, a program called FN Stats
can be used to verify that the Fire OWSs and Fire-Net NCMs are
communicating across the network. A step-by-step guide of FN Stats is
included in the
Commissioning and Troubleshooting Procedures section
of this technical bulletin.
You need to determine which options you’ll use to design the system,
including:
•
network communication configuration: Style 4 or Style 7
•
media which includes wire, fiber optic cable, or a combination of wire
and fiber optic cable
•
media interface board for each FN node
•
internode connection: bus or point-to-point
Distance limitations also need to be considered when designing the system
and vary per medium selected. For details, refer to
Distance Capabilities
in the Engineering Procedures section later in this bulletin.
Design
Considerations