Digi MIL-1240LX, MIL-1240SX Installation Manual
MIL-1240LX/MIL-1240SX
1000BASE to 1000BASE
Redundant T ransceiver
RX TX
Main Port
1000BASE-SX to 1000BASE-LX
Selector
Primary Port
TX RX TX RX
SC Connector
MIL•1240LX
Gigabit Ethernet
Redundant Transceiver
Backup Port
SC Connector
PWR2
5 VDC
1.5 A
PWR1
PWR2
MSD
PSD
SSD
PWR1
5 VDC
1.5 A
Installation Guide
This guide includes the following information:
“Introduction” on page 2
“Installation” on page 2
“Indicators” on page 3
“Theory of Operation” on page 3
RX TX
Main Port
MIL•1240SX
Gigabit Ethernet
1000BASE-SX to 1000BASE-SX
Redundant Transceiver
Selector
Primary Port
TX RX TX RX
Backup Port
SC ConnectorSC Connector
PWR2
5 VDC
1.5 A
PWR1
PWR2
MSD
PSD
SSD
PWR1
5 VDC
1.5 A
“Specifications” on page 4
“Legal” on page 6
Doc #: 90000092 Rev. B
Install Guide
About this Manual
This guide covers both the MIL-1240LX and the MIL-1240SX. The terms “MIL1240” and “transceiver” are used throughout this document to describe either
unit.
Introduction
The MIL-1240 series of transceivers are 1000BASE, fault-tolerant transceivers that
provide redundant path for a critical gigabit Ethernet devices (e.g., a file server).
The difference in the models is:
• MIL-1240LX is a short-wave optic signals to long-wave optic signals
transceiver
• MIL-1240SX is a short-wave optic signals to short-wave optic signals
transceiver
There are three ports on the transceiver:
• Main Port
• Primary Port
• Backup Port
Typically, the
Primary
Main Port
Port
and
connects to a critical gigabit Ethernet device. The
Backup Port
connect to two ports on the same switch or
two ports on two different switches.
Features
• MIL-1240LX: One pair of multi-mode, short-wave transceivers using an SC
connector and two pair of single-mode, long-wave transceiver using SC
connectors
• MIL-1240SX: Three pair of multi-mode, short-wave transceivers using SC
connectors
• Primary and backup power supplies capable, but ships with the primary
power supply only
Installation
1. Connect an SC-type cable to the
2. Connect the other end to the appropriate device.
3. Connect
Primary
multi-mode 62.5/125mm fiber optic cables.
4. Connect a power cable to PWR1
Model: MIL-1240LX/MIL-1240SX Transceivers 2
Port and
Main
Port of the MIL-1240.
Backup Port to the appropriate devices. Use
. A second, optional power supply may be
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