COMNET Single Mode Dual-Channel Fiber Optic Cable Break Detector (Up to 22.4 mi)

COMNET Single Mode Dual-Channel Fiber Optic Cable Break Detector (Up to 22.4 mi)
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COMNET FDC2 Overview

The ComNet FDC2 dual-channel modems are designed to detect and report a breakage or the loss of optical signal in either multimode or singlemode fiber plants. Featuring a self-contained transmitter and receiver, these units provide an optical output that is transmitted continuously through a customer-furnished fiber loop, where it returns to the internal receiver section. Should the optical path be lost through a deliberate or unintentional breakage of the fiber, relay contacts in the modem immediately change their state and report the loss of optical signal. These contacts are user-configurable as either normally open (NO) or normally closed (NC), and may be utilized for either a local or remote indication of cable plant tampering, damage, or failure. The dual-channel contains two independent transmitter and receiver units in one compact package, and is ideal for continuously monitoring the optical status of two separate fiber loops.

Key Features

  • Instantaneously reports optical fiber breakage or damage locally or remotely
  • Dry relay contacts may be configured for NO or NC operation
  • Automatic resettable solid state current limiters for modem protection
  • Voltage transient protection on all power and signal input/output lines provides protection from power surges and other voltage transient events
  • Ambient operating temperature range: -40 °C to +75 °C for deployment in virtually any unconditioned out-of-plant or roadside environment
  • Bi-color status indicating LEDs provide rapid indication of critical operating parameters
  • Plug-and-play design for ease of operation - no optical or electrical adjustments required
  • Hot-swappable rack modules
  • Interchangeable between stand-alone or rack mount use - ComFit
UPC: 845770006308


Device TypeNetwork tester
FeaturesStatus LED, normally open (NO) mode, normally closed (NC) mode, automatic resettable solid state current limiters, voltage transient protection, up to 36km distance
Tests, Tools and MeasurementsOptical loss, fiber breaks detection
Included AccessoriesPower adapter
ConnectorsST single-mode x 4
Compliant StandardsRoHS, FCC, cULus
WarrantyLifetime warranty
Dimensions & Weight
Width6.1 in
Depth1.1 in
Height5.3 in
Weight31.74 oz
Environmental Parameters
Min Operating Temperature-40 °F
Max Operating Temperature167 °F
Min Storage Temperature-40 °F
Max Storage Temperature185 °F
Humidity Range Operating0 - 95% (non-condensing)
Packaging Info
Package Weight1.4 lb
Box Dimensions (LxWxH)10.7 x 6.4 x 3.2"
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