• Bus or String
• Async Data Rates up to 38.4 Kbps
• Separate Broadcast/Respond Channels
• Multimode & Single Mode (850/1300/1550nm)
• Distances up to 100Km
• 4, 8 or 12 Channels RS-232/422/485
• Tx & Rx LED's for Each Channel
• Anti-Streaming Capability
• Built-In Power Redundancy
• Local Dry Contact Alarm Relay
• Rackmount or Standalone
• Extend telephone lines with LT1900 RS-232 or Fiber Phone Extenders

Applications

Designed for Bus or String topologies, the LT2900 is often used to interconnect Remote Terminal Units (RTU's) or Programmable Logic Controllers (PLC's) in Utility substations SCADA Networks that require multiple channels. It is also used for similar connectivity applications in Traffic Control, Industrial Process and Security System fiber Optic Networks.

Description

Intended for Bus or String topologies, the LT2900 Multi-Drop Fiber Optic Multiplexer links up to 12 monitoring devices (RTU's  or PLC's) fitted with RS-232, RS-422, or RS-485 (2 or 4 wire) interfaces to a Host controller or CPU. It supports asynchronous data rates up to 38.4 Kbps.

The LT2900 works in a "polled-response" (also called Slave/Master) types of communication network. Model LT2900 is the Master, LT2901 is the Slave Units. A wide-range temperature version (-20°C to 70°C), Model LT2900T, is available for extreme environment applications.

Each LT2900 unit provides two pairs of fiber interfaces and 4, 8 or 12 independent RS-232 and/or RS-422/485 channels.  The RS-232 channels can be used for data or as telephone extension with the Model LT1900 "Quick-Talk" Telephone Extenders.  Diagnostic LED's 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.

Specifications