• 8 to 64 Channels (Expandable to 128)
• Data Rates Up to 38.4 Kbps (32 Ch.)
• Built-In Power Redundancy
• Optional Optical Redundancy
• Local Dry Contact Relay Alarm
• Built-In Test Signal Generator
• Local & Remote Loopback Features
• Multimode or Single Mode (850/1300/1550nm)
• Extend telephone lines with LT1900 RS-232/Fiber Phone Extender
• Rackmount or Standalone

Applications

Description

The LT8108 Fiber Optic Multiplexer, maximizes user flexibility by offering field interchangeable interfaces, modular expandability from 8 to 64 channels and power/optical redundancy.  It supports most popular interfaces including RS-232, RS-422, TTL, RS-485and Dry Contact Relays.  It supports data rates up to 38.4 Kbps*.  Power redundancy is standard, optical redundancy is optional.  Both feature automatic switchover.  

Each LT8108 unit consists of an 8-channel base unit and up to seven optional 8-channel add-on PC Cards.  These PC Cards can be “Stacked” (in 8-Channel increments) up to 64 Channels.  A 128-Channel version is possible by using a fan-out cable to expand each RJ-11 port into two RS-232 Async channels. For units with more than 24 Ch., the LTRM191 Rackmount Card Cages are required.

Because the electrical interfaces are modular, they are interchangeable at any time--before or after installation.  A user can mix up to four different interfaces (in 2-Channel increments) on each 8-Channel card.  Each PC expansion Card is identified by a card number defined by a front panel DIP switch.

Diagnostics are extensive and include Local and Remote Loopback, 22 LEDs, and a Test Signal Generator.  LEDs include “Tx”, “Rx”, “Alarm”, “Vcc”, “RxA”, “RxB”, & “PWR”.  Individual “Tx” and “Rx” LEDs are provided for each channel.  The built-in test signal generator verifies both device and fiber optic link operation.  This feature benefits users by helping technicians verify that both local & remote devices and the fiber optic link are operating normally.  No other test equipment is required for link and device verification.

The LT8108 is compatible with all types and sizes of multimode (850/1300nm) or single mode (1300/1550nm) fiber optic cable.  Fiber optic connectors are ST or FC; electrical connectors are RJ-11.  Power is 12VDC or 115/230VAC with an external power cube.  An extreme temperature version (-20° to 70°C), Model LT8108T, is also available.

Fiber optic connectors are ST; FC is optional. Electrical connectors are RJ11. Power is 9 to 12VDC or 115/230VAC with a power card (Model LTRMPS-01) or a power cube.  

*Contact factory for higher requirements/availability.

Specifications