Data Sheet

LIFETIME WARRANTY WWW.COMNET.NET TECH SUPPORT: 1.888.678.9427
8-channel contact closure non-latching receiver
Description
The ComNet™ FDC8NLR 8-Channel Contact Closure
Receiver unit provides up to eight independent normally-
open (NO) dry contact closures over one multimode or
single-mode optical fiber, when used in conjunction with
the companion ComNet model FDC8 Transmitter unit.
Microprocessor-based logic in the FDC8 transmitter
detects a customer-furnished switch or contact closure,
and encodes the closure into robust data packets that
are mapped and transmitted to the FDC8NLR Receiver.
Packets received with excessive bit errors will not
result in random changes in the receiver relay contact
resting or actuated states, making this system ideal for
mission-critical remote switching applications. Solid-state
non-latching relays are utilized for the highest level of
long-term system reliability and trouble-free operation;
electromechanical relay switching is not employed. The
relay contacts automatically default to a normally-open
state in the event of a loss of prime operating power or a
loss of the received optical signal. These receiver modules
incorporate status indicating LEDs for rapidly providing a
local indication of each contact closure channel, optical
link continuity, and operating power. Packaged in the
exclusive ComNet ComFit housing, these units may be
either shelf or rack-mounted, or may be DIN-rail mounted
by the addition of ComNet model DINBKT1 Adaptor Plate
Kit. Industrially hardened and rated for operation from
-40 to +75 degrees C, the FDC8NLR may be deployed
in virtually any unconditioned out-of-plant or trackside/
roadside environment, and voltage transient protection
is provided across the operating voltage input and relay
contact output rails. Plug-and-play design ensures ease
of installation and operation, and no optical or electrical
adjustments are ever required.
C
8
Features
- Receive up to eight contact closures over one optical fiber
- Eight channel Point-to-Point architecture
- Power and eight individual channel status LED indicators
- Eight solid-state relays
- Built-in relay surge protection
- Tested and certified by an independent laboratory for
full compliance with the environmental requirements
(ambient operating temperature, mechanical shock,
vibration, humidity with condensation, high-line/low-line
voltage conditions and transient voltage protection)
of NEMA TS-1/TS-2 and the Caltrans Specification for
Traffic Signal Control Equipment.
- Microprocessor-based logic in receiver unit eliminate
random contact closure status in electrically noisy
environments.
- Relay contact rating: 30 VDC, 0.700 Amp, normally open
- Automatic resettable solid-state current limiters
- Hot-swappable rack modules
- Interchangeable between stand-alone or rack mount use
– ComFit
- Lifetime Warranty
FDC8NLR(M)(S)1
Applications
- Remote control of mission-critical vital trackside
relaying or roadside signaling equipment
- Remote operation of lane, gate, or door operators
or controllers
- Building HVAC, industrial control, and SCADA
networks
- Non-latching fire and intrusion alarm systems
- Non-latching triggered alarm & PIR (Passive Infrared)
detection systems