Data Comm for Business, Inc.

Fiber Optic Modem

FEATURES
DESCRIPTION
SPECIFICATIONS

Customer Equipment Interface
Fiber Line Interface
Controls and Indicators
Operational Modes
Physical/Electrical
How to Order

APPLICATION

FEATURES

Fiber Optic Modem/Line Driver
Point to point or daisy chained multipoint
RS-232 or RS-422 interface
Speeds to 1.5 Mbps
Anti-streaming timer option
LED indicators
-40 to +75 C operation

The FOM-02MSA Fiber Optic Line Driver transmits asynchronous data up to 1.5 Mbps over 5 Km of fiber optic cable (Up to 30+ miles with single mode cable). It can be used point-to-point or can be daisy chained. Four models are available, 850 nm for multi-mode fiber and 1300 nm for single mode fiber, and each with one or two fiber interfaces.

In daisy-chain mode (using the model with two fiber interfaces), the unit has a pair of emitters and a pair of detectors. The FOM-2MSA can be set up as a Master or Remote unit. A multidrop circuit has only one Master, located at the host computer, which sends out polling data to downstream Remote units. In the master mode, transmit data from the RS-232 interface is sent downstream to the Remote units, in parallel over the two emitters. Receive data coming in on the detectors is OR'ed and is presented on the RS-232 interface. In the remote mode, the data is daisy chained. Data coming in on detector 1 is sent to the RS-232 receive port, and is regenerated to the emitter 2 fiber optic link. Data coming in on detector 2 is regenerated and sent out over emitter 1 and this data is not seen on the Local RS-232 interface. RS-232 transmit data on the local unit is sent out over emitter 1, upstream back to the master.

The FOM-02MSA has an RJ-45 jack which is used to connect the unit to modem links. This allows a combination of fiber and wire links on the same traffic control or other polling system.

SPECIFICATIONS

DTE Interface

DTE Port Interface

Port: RS-232 speeds to 115.2 Kbps or RS-422, speeds to 1.5 Mbps
DTE port connector: DE-9S
Async data rates to 38.4 Kbps
Point-to-Point or Multi-drop

Fiber Line Interface

ST Type Fiber Connectors
850 nm multimode cable or 1300 mn single mode cable

Controls and Indicators

LED's for Power, Transmit Data, Receive Data
Master or Remote mode for point to multipoint operation
Power on/off switch
DIP switch for master or remote mode in multpoint applications

Operational Modes

Master mode: Emitters 1 and 2 operate in parallel, sending data downstream from the RS-232 interface. Detectors 1 and 2 are logically OR'd back to the RS-232 interface.
Local Mode, Daisy chain: Data comes in on fiber detector 1, passed on downstream on emitter 2 and is presented on the RS-232 interface. Data coming upstream to the unit on detector 2 is passed upstream on emitter 2.
Daisy Chain: Links may be daisy chained, where the unit will regenerate data over the second full duplex fiber link. The choices are implemented via DIP switch.

Physical and Electrical

Temp range of -40C to +75C
Standalone Version: 1.5" X 5.75" X 8.5"
Wall-mount power supply 120VAC, 7 watts
Various DC power supply options available: 12, 24, -48, 125 Vdc

Rear view

APPLICATION

How to Order

FOM-02MM/SA	2-Port Fiber Optic Modem, Multimode (850nm), standalone	$495
FOM-01MM/SA	1-Port Fiber Optic Modem, Multimode (850nm), standalone	$445
FOM-02MM/RM	2-Port Fiber Optic Modem, Multimode (850nm), rackmount	$495
FOM-01MM/RM	1-Port Fiber Optic Modem, Multimode (850nm), rackmount	$445
FOM-02SM/SA	2-Port Fiber Optic Modem, Singlemode (1300nm), standalone	$1395
FOM-01SM/SA	1-Port Fiber Optic Modem, Singlemode (1300nm), standalone	$995
FOM-02SM/RM	2-Port Fiber Optic Modem, Singlemode (1300nm), rackmount	$1395
FOM-01SM/RM	1-Port Fiber Optic Modem, Singlemode (1300nm), rackmount	$995



Data Comm for Business Inc. 2949 County Road 1000 E Dewey, Il 61840	Voice: 217-897-6600 Toll Free: 800-4-DCB-NET Toll Free: 800-432-2638	Email: Contact Page Web: www.dcbnet.com Fax: 217-897-1331	Shopping cart is
All DCB web pages copyright ©1995--2008 Data Comm for Business, All rights reserved. EtherPath®, EtherSeries®, EtherPoll®, EtherBridge® and EtherModem® are Registered Trademarks of Data Comm for Business, Inc.

Fiber Optic Modem