Digi MIL-240FXC User manual
Doc #: 90000021 Rev. C
MIL-240FXT/MIL-240FXC
100BASE-FX
Redundant Port Selector
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
“Theory of Operation” on page 3
“Indicators” on page 3
“Specifications” on page 4
“Legal” on page 5
ST Connector
ST ConnectorST Connector
SC Connector
SC ConnectorSC Connector
MPSD
PWR
BPSD
PPSD
PS
5 V DC
1.5 A
Primary Port
Main Port
Backup Port
Selector
MIL•240FXC
100BASE-FX
Redundant Port Selector
SC Connector
MPSD
PWR
BPSD
PPSD
PS
5 V DC
1.5 A
Primary Port
Main Port
Backup Port
Selector
MIL•240FXT
100BASE-FX
Redundant Port Selector
ST Connector
Install Guide
Model: MIL-240FXC/MIL-240FXT 2
About this manual
This manual covers both the MIL-240FXT and the MIL-240FXC. The terms “MIL-
240FX,” “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 MIL-
240FX has three 100BASE-FX ports:
Main
Port
,
Primary
Port
, and
Backup
Port
.
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
Port
for the
presence of a link signal. If the signal is present, then the
Main Port
and the
Primary
Port
will connect, and the
Backup
Port
is disabled. Any device
connected to the
Backup
Port
will not detect a signal at this time. However, if the
device does not detect a signal on the
Primary
Port
, then the
Main
Port
and
Backup
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.
2. Supply power to the unit using the power supply adapter included with the
unit. Make sure the
PWR
LED illuminates.
3. Check the
PPSD
,
BPSD
and
MPSD
LEDs for proper status. This depends on the
status of the devices connected to the
Primary
,
Backup
and
Main
Ports
.
Install Guide
Model: MIL-240FXC/MIL-240FXT 3
Theory of Operation
The transceiver for the
Main Port
selects either the
Primary Port
or the
Backup Port
for transmission and reception. The
Main Port
selects the
Primary Port
if the transceiver on the
Primary Port
detects a link signal.
Otherwise, the
Main Port
selects the
Backup Port
if link port is good.
If the
Main Port
does not detect a link signal—no signal will be transmitted on
the
Primary Port
and the
Backup Port
. If a link signal is not detected on the
Primary Port
and the
Backup Port
—no signal will be transmitted on the
Main Port
.
Figure 1.MIL-240FX Connections
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
Port
. It is yellow.
Note:
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
may be on).
When
MPSD
and
BPSD
illuminate at the same time, the node attached to the
Main
Port
is connected to the node attached to the
Backup
Port
(
PPSD
is off).
Server
Switch
Switch
MPSD
PWR
BPSD
PPSD
PS
5 V DC
1.5 A
Primary Port
Main Port
Backup Port
Selector
MIL•240FXC
100BASE-FX
Redundant Port Selector
SC Connector
Install Guide
Model: MIL-240FXC/MIL-240FXT 4
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
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
SC Connector
(rear view)
ST Connector
(rear view)
Doc #: 90000021 Rev. C
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
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
Address: 1299 Orleans Drive
Sunnyvale, CA 94089
Voice: 408/744-2775
Fax: 408/744-2793
E-mail: [email protected]
Five-Year LimitedWarranty
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.
This manual suits for next models
1
Table of contents
Other Digi Transceiver manuals
