Engineering Procedures; Planning Considerations - Johnson Controls Metasys Intelligent Fire Network Technical Manual

Planning
Considerations
Environment
Power

Engineering Procedures

The operating environment of the FN nodes must maintain operating
temperatures between 10-40°C (50-104°F) while maintaining relative
humidity at a value of 20-80%. The atmosphere must be free of corrosive
chemical vapors that may damage electronic equipment. The Fire OWS
has additional considerations regarding dust in the environment. For
additional environmental information specific to the Fire OWS, refer to
the Fire Operator Workstation (Fire OWS) Technical Bulletin
(LIT-636014) in the Metasys Network Technical Manual (FAN 636).
All components of the FN must be provided with a standby power supply.
The power supply must provide energy to the components automatically
within 30 seconds without loss of signals if the primary power source is
incapable of providing the minimum voltage for proper operation.
The following FN components are not capable of operating directly from a
24 VDC source of standby power:
• Fire OWSs
• dedicated printers
• Fire-Net NCMs
• Fire Watchdog Enclosure including the watchdog timer
You must supply two forms of emergency power for these devices as well
as any other FN devices that cannot be powered by 24 VDC battery
backup systems. One is an Uninterruptable Power Supply (UPS) system
that is UL 1481 Recognized with sufficient capacity to operate each
component for at least 15 minutes or until the secondary supply is capable
of supplying the UPS input power requirements. La Marche
Manufacturing Co. has an UPS power supply that is UL 1481 Recognized.
For details, contact: La Marche Manufacturing Co., 106 Bradrock Drive,
Des Plaines, IL 60018 (1-847-299-1188).
The second is a system that can supply 120 VAC with sufficient capacity
to operate these devices under a maximum load for 24 hours. This power
must be provided by multiple engine-driven generators, one of which is
arranged for automatic starting.
IFC Networking—Metasys Intelligent Fire Network 13