FIBER SENSYS Fiber Defender FD508 User Manual page 10

All zones must be properly installed and terminated before connecting to the APU. In
addition, it is helpful to test the optical loss of each zone. Optical loss, however, must be
tested before the termination units are installed on the ends of the zones (the termination
units are not transmissive). Also, each zone should be numbered, and a label with the
zone number affixed to the fiber near the connector that will plug into the APU.
The insensitive lead-in fibers plug directly into the APU, and are always connected with an
angled polished SC connector (SC/APC). The FD508 can support up to eight fully
independent sensing fibers, or zones. However, these zones must be connected to the
APU in a specific order, as determined by the Port Assignment software. For more on the
Port Assignment software, see the application note: AN-SM-023 Port Assignment Wizard.
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Fiber Defender FD508 User Manual 10