The TC2900 Multi-Drop Fiber Optic
Multiplexer interconnects up to 12 Remote Terminal Units
(RTU's) or Programmable Logic Controllers (PLC's) in Utility
substation & SCADA networks requiring multiple channels. It
is also used for similar connectivity applications in
Traffic Control, Industrial Process and Security System
The TC2900 works in "poll-response"
(also called Slave/Master) types of communication networks.
The RS-232 and RS-485 interfaces are independent and operate
over single mode or multimode fiber.
It can have multiple masters for
maximum reliability. Fault conditions are detected both Tx
and Rx, upstream & downstream of each unit, and
automatically re-route data paths to maintain network
integrity. Dry contact alarms can be connected to RTUs/PLCs
for pinpointing fault locations.
Each TC2900 unit provides two pairs
of fiber interfaces and 8 or 12 independent RS-232 and/or
RS-422/485 channels. Diagnostic LEDs include Tx and Rx for
each channel, Power A, Power B, VccA, VccB, SyncA, SyncB,
LP-A, and LP-B. An Anti-Streaming capability is provided to
prevent a single node failure (e.g. "babbling") from
bringing down the entire network.
TC2900 is compatible with all popular types and sizes of
fiber optic cable and is available in multimode (850/1300nm)
or single mode (1300/1550nm) versions. Fiber optic
connectors are ST or FC. Electrical connectors are RJ-11
female. Power is 12VDC. Optional power sources are 24VDC,
-48VDC, or 115/230VAC with an external power cube.
TC2900 is available in a Single or Dual Master
configuration. The Dual Master configuration is the most
fault-tolerant. If a fiber link becomes broken or degraded
in this topology, the Host controller can detect that an RTU
is not responding to its broadcast message and re-route the
message to the secondary (backup) Master unit through a
backup link, thereby reaching the lost Slave unit(s) and