Data Sheet
FEATURES
› One or two fiber loop units available
› 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
› May be DIN-rail mounted by the addition of ComNet DIN-Rail
adaptor plate (Model DINBKT1 or DINBKT4, sold separately)
› Lifetime warranty
APPLICATIONS
› Fencing and Perimeter Surveillance: Optical fiber woven into
fencing or other structures
› Solar Panel/Photovoltaic Array (PVA) Theft Protection
› Protection of High-Value Assets and Facilities
› Continuous Status/Continuity Monitoring of Mission-Critical
Fiber Optic Trunk Cables
The ComNet FDC1 single-channel and FDC2 dual-channel modems are designed to
detect and report a breakage or the loss of optical signal in either multimode or single-
mode 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 version 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.
FDC1 / FDC2
Fiber Optic Cable Breakage Monitor/Detector
1 OR 2HARDENEDINCLUDED
LIFETIME WARRANTY WWW.COMNET.NET TECH SUPPORT: 1.888.678.9427