FIBER SENSYS FD322 Anwendungshinweis - Seite 6

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The cable break detector can be implemented utilizing one or both of the APU channels. If only one

channel is used, the other channel is typically "jumpered-out," which means that a short single-mode

or multi-mode jumper would be used to close the loop of the unused channel; that way, either the Fault

indicator or the Alarm indicator can be used with the functioning channel. Both channels share a

common Fault relay so if one of the two channels was not connected, the Fault relay would

permanently be in a fault state, and a red light would signal a fault on the unused channel. The primary

purpose of "jumpering-out" the unused channel is to satisfy the unused channel and prevent the red

LED from illuminating.

Figure 4

Fiber SenSys, Inc.

2925 NW Aloclek Drive, #120

Hillsboro, Oregon 97124, USA

Tel: +1(503)692-4430 • Toll free (US) +1(800)641-8150

www.fibersensys.com

Connect one end of the cable being used to detect

breaks to the output port on FD322; connect the other

end to the input port (on the same side).

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