FIBER SENSYS FD322 Nota de aplicación - Página 5

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If the optical loss is less than 5dB, connect the two ends of the optical cable to the APU and use the

tuning software to disable both processors. When configured in this manner, the APU will not alarm

when the fiber is shaken. The alarm relay will change states if the fiber is broken, cut, or unplugged. If

the IP port is being used, the processor will output a fault indicator via XML messaging when the cable

is disconnected or cut. Figure 3 below displays a screenshot from the FD322 Tuning Software

reflecting the proper parameters for cable break detector applications; observe that all the detection

related settings are disabled.

The cut and climb settings are disabled, so movement of the cable does not cause an alarm; only

cuts, breaks, or unplugging the connector will cause an alarm with these settings.

Figure 3