Page 1
MIL-240FXT/MIL-240FXC
100BASE-FX
Redundant Port Selector
SC Connector
Main Port
MIL•240FXC
100BASE-FX
Redundant Port Selector
SC Connector
Selector
Primary Port
Backup Port
MPSD
PPSD
PWR
BPSD
5 V DC
PS
1.5 A
ST Connector
SC ConnectorSC Connector
Installation Guide
This guide includes the following information:
“About this manual” on page 2
“Introduction” on page 2
“Features” on page 2
“Installation” on page 2
Main Port
Selector
Primary Port
MIL•240FXT
100BASE-FX
Redundant Port Selector
ST Connector
Backup Port
ST ConnectorST Connector
MPSD
PPSD
BPSD
PWR
5 V DC
PS
1.5 A
“Theory of Operation” on page 3
“Indicators” on page 3
“Specifications” on page 4
“Legal” on page 5
Doc #: 90000021 Rev. C
Page 2
Install Guide
About this manual
This manual covers both the MIL-240FXT and the MIL-240FXC. The terms “MIL240FX,” “transceiver,” and “device” are used throughout this document to
describe either transceiver.
Introduction
The MIL-240FXC/240FXT is a 100BASE-FX, fault-tolerant transceiver. It provides
a redundant path for a critical Fast Ethernet device, such as a file server. The MIL240FX has three 100BASE-FX ports:
Port
.
Main
Port, Primary Port
, and
Backup
Typically, the Main Port will connect to a critical Fast Ethernet device (i.e., a file
server). The Primary Port
and the Backup Port connect to two different ports
of a switch, or two different ports of two different switches.
When the unit is powered on, the MIL-240FX checks the Primary
presence of a link signal. If the signal is present, then the Main Port
Primary
connected to the Backup
device does not detect a signal on the Primary
Backup
Port will connect, and the Backup Port is disabled. Any device
Port will not detect a signal at this time. However , if the
Port , then the Main Port and
Port will connect.
Features
• Three multi-mode, SC connector for the MIL-240FXC
• Three multi-mode, ST connector for the MIL-240FXT
• Compact aluminum enclosure
• External power supply (5V DC, 1.5 Amp)
Installation
To install the MIL-240FX:
1. Connect the
Main ,
Primary and
Backup
Ports to the appropriate devices.
Use multi-mode 62.5/125mm fiber optic cables.
Port for the
and the
2. Supply power to the unit using the power supply adapter included with the
unit. Make sure the PWR
3. Check the PPSD , BPSD and MPSD LEDs for proper status. This depends on the
status of the devices connected to the Primary
Model: MIL-240FXC/MIL-240FXT 2
LED illuminates.
,
Backup and
Main
Ports .
Page 3
Install Guide
Theory of Operation
The transceiver for the
Backup Port
Primary Port
for transmission and reception. The Main Port selects the
if the transceiver on the Primary Port detects a link signal.
Main Port selects either the
Otherwise, the Main Port
If the
the Primary Port
Primary Port
Main Port
Main Port does not detect a link signal—no signal will be transmitted on
and the Backup Port . If a link signal is not detected on the
and the Backup Port —no signal will be transmitted on the
.
Server
Figure 1.MIL-240FX Connections
selects the
Main Port
MIL•240FXC
100BASE-FX
Redundant Port Selector
SC Connector
Selector
Primary Port
Backup Port
Primary Port or the
Backup Port if link port is good.
Switch
Switch
MPSD
PS
5 V DC
1.5 A
PPSD
PWR
BPSD
Indicators
There are 4 LEDs on the MIL-240FXT/240FXC:
• MPSD: (Main Port Signal Detect): This LED illuminates when the unit detects
an input signal at the Main
Port . It is yellow.
• PWR: (Power): This LED illuminates when the unit is powered up (using the
power supply adapter). It is green.
BPSD: (Backup Port Signal Detect): This LED illuminates when the unit
•
detects an input signal at the Backup
Port . It is yellow.
• PPSD: (Primary Port Signal Detect): This LED illuminates when the unit
detects an input signal at the Primary
Note:
When
Port
When MPSD and PPSD illuminate at the same time, the node attached to the Main Port
will connect to the node attached to the Primary Port (BPSD
MPSD
and
BPSD
illuminate at the same time, the node attached to the
is connected to the node attached to the
Port . It is yellow.
Backup Port (PPSD
may be on).
is off).
Main
Model: MIL-240FXC/MIL-240FXT 3
Page 4
Install Guide
Specifications
Dimensions: 4.0” x 3.5” x 1”
Enclosure: Aluminum (.50 thick)
Power Supply
External power is required for the MIL-240FXT/240FXC. The system board draws
900 mA at normal operation in room temperature of 25 C.
– An 110 V AC wall mount for domestic use
– A 220 V AC with IEC socket converting to 5 V DC 1.5 Amp for international
use
Connectors
SC Connector
(rear view)
ST Connector
(rear view)
Figure 2. Connections
Reliability
A 24 hour temperature cycling of 0° to 60° C without any dribble or BER
degraded.
Storage Temperature
• Minimum: -25° C
• Maximum: 75° C
Operating Conditions
Table 1: Recommended Operation Conditions
Parameters Minimum Maximum
Operating Temperature +5° C +40° C
Humidity: Non-condensing 10 % 95 %
Signal Output Load 35 ohm 75 ohm
Supply Voltage 4.75 V 5.25 V
Ambient Operation 0 70
Model: MIL-240FXC/MIL-240FXT 4
Page 5
Legal
Regulatory Approvals
• FCC Class A
• UL 1950
• CSA 22 No. 950
• EN60950
• CE
– EN55022 Class B
– EN50082-1
Canadian EMI Notice
This Class A digital apparatus meets all the requirements of the Canadian Interference-Causing
Equipment Regulations.
Cet appareil numérique de la classe A respecte toutes les exigences du Règlement sur le matériel
brouilleur du Canada.
European Notice
Products with the CE Marking comply with both the EMC Directive (89/336/EEC) and the Low Voltage
Directive (73/23/EEC) issued by the commission of the European Community. Compliance with these
directives implies conformity to the following European Norms:
• EN55022 (CISPR 22) - Radio Frequency Interference
• EN50082-1 (IEC801-2, IEC801-3, IEC801-4) - Electromagnetic Immunity
• EN60950 (IEC950) - Product Safety
Digi International warrants to the original consumer or purchaser that each of its
products, and all components thereof, will be free from defects in material and/or
workmanship for a period of five years from the original factory shipment date. Any
warranty hereunder is extended to the original consumer or purchaser and is not
assignable.
Digi makes no express or implied warranties including, but not limited to, any implied
warranty of merchantability or fitness for a particular purpose, except as expressly set
forth in this warranty. In no event shall Digi be liable for incidental or consequential
damages, costs, or expenses arising out of or in connection with the performance of the
product delivered hereunder. Digi will in no case cover damages arising out of the
product being used in a negligent fashion or manner.
To Contact Digi
For prompt response when calling for service information, have the following information ready:
• Product serial number and rev.
• Date of purchase
• Vendor or place of purchase
Reach Digi Technical Support at 408/744-2751
Or E-mail at “sun-tech@dgii.com”
Address: 1299 Orleans Drive
Sunnyvale, CA 94089
Voice: 408/744-2775
Fax: 408/744-2793
E-mail: info@dgii.com
Five-Year Limited Warranty
Doc #: 90000021 Rev. C
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