2.3.5.2
Backup Power
Provide backup power to the primary power by dedicated batteries in
remotely located system elements such as individual sensors and in control
communicators. [When radio frequency (RF) operation is required, batteries
shall be an integral part of dispersed system elements.] Batteries shall
be capable of operation in any position and shall be protected against
venting caustic chemicals or fumes within an equipment cabinet. Batteries
shall also be capable of continuous operation for up to [4] [_____] hours
without recharge or replacement. If the sensors power requirements exceed
the allowable UL rated capacity of the control communicator battery,
provide the number of separate power supplies required to power the
sensors. Provide each power supply with its own rechargeable battery and
charger.
2.4
SYSTEM PERFORMANCE REQUIREMENTS
Provide system components to operate as described herein within the context
of the integrated system performance previously described. Where
inconsistencies occur between the following component performance
requirements and integrated system level performance descriptions,
integrated system performance descriptions shall take precedence.
2.4.1
Modularity
Provide system components to facilitate modular subassembly and part
replacement. Electronic components of the system shall be of the
solid-state type, mounted on printed circuit boards conforming to UL 796.
Circuitry shall not be so densely placed as to impede maintenance.
Power-dissipating components shall incorporate safety margins of not less
than 25 percent with respect to dissipation ratings, maximum voltages, and
current-carrying capacity. Light duty relays and similar switching devices
shall be solid-state or hermetically sealed electromechanical type.
2.4.2
Provide only components in current manufacturing production. Components
shall be manufactured to meet requirements specified herein and shall be
free from characteristics and defects which affect appearance or
serviceability or which render equipment unsuitable for the intended
purpose. Provide components designed for continuous operation at specified
conditions.
2.4.3
Components shall be capable of being maintained using commercially
available standard tools and equipment. Components shall be arranged and
assembled to be readily accessible to maintenance personnel without
compromising the defeat resistance of the IDS.
2.4.4
2.4.4.1
Interior Conditions
Equipment installed in environmentally protected interior areas shall meet
performance requirements specified by UL for the specific equipment or
device.
SECTION 13702N
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