In-line Fiber Optic Modem
Model BB-FOSTC
www.advantech-bb.com
PRODUCT FEATURES
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Extend serial signals up to 4 km (2.5 mi) over multi-mode fiber
Point-to-point or multi-drop ring configuration
Inherent EMI/RFI immunity from surges, spikes, ground loops
Data rates: RS-232, up to 115.2 kbps; RS-422/485, 500 kbps
Quick, inline installation
Modbus compatible
External power source required (not included, sold separately)
Fiber optic cabling has inherent resistance to EMI/RFI and transient immunity,
making it ideal for industrial and utility data communication applications.
Model BB-FOSTC provides the most versatile connection possible between
asynchronous serial equipment using fiber optic cable. Any two pieces of
asynchronous serial equipment can communicate full- or half-duplex over
two fibers at distances up to 4 km (2.5 mi). The converter can be used for
point-to-point communications between serial devices. It can also be used to
create a multi-drop master/slave configuration, allowing one serial device to
talk to multiple slave devices around a fiber ring.
RS-232, RS-422 or RS-485 data signals are supported. Different standards
can be mixed and matched to allow RS-232 devices to connect to RS-422 or
RS-485 systems. This means Model BB-FOSTC can replace converters and
isolators when connecting remote devices, while providing the EMI/RFI and
transient immunity of optical fiber.
Model BB-FOSTC supports both Transmit Data and Receive Data lines, and
provides full hardware control of the RS-485 driver with B+B SmartWorx’
Automatic Send Data Control circuit. All serial connections are provided on
the same DB25 female connector, while the multi-mode fiber is connected via
two ST connectors. Powered by 12 VDC at 140 mA (maximum). An external
power sourced is required (not included, sold separately).
ORDERING INFORMATION
MODEL NUMBER
BB-FOSTC
SERIAL CONNECTOR FIBER CONNECTOR
DB25 female
Multi-mode ST
MODBUS?
✔
ACCESSORIES – sold separately
BB-SMI6-12V-P230C1
- Power Supply, 12 VDC, 6 Watt, 2.5mm Plug, International AC
Input, BB-International AC Blades
BB-232CAM
- PC-AT serial computer to modem cable, 1.8 m (6 ft)
Automatic Send Data Control Explained
As operating systems become more complex, it is increasingly difficult to control
an RS-485 driver with standard software and the RTS line. This is especially true in
Windows and multi-tasking operating systems. With B+B SmartWorx’ Automatic Send
Data Control circuit, driver control is in the converter hardware, so you do not have to
work with software at all.
The circuit monitors data flow and enables the driver during transmission and
automatically disables it when no data is being sent. There is no need to rework
software or install new drivers. Most B+B SmartWorx RS-232 to RS-485 converters
and RS-485 serial cards include Automatic Send Data Control.
Note: Under the Model Number colulmn, change the “XX” to desired fiber length suffix for actual Model Number.
Example: If you want a 1M (1 meter) long, multi-mode LC to LC fiber cable, the part number would be DFMM-LCLC-1M.
All product specifications are subject to change without notice.
BB-FOSTC_4918ds
orders@advantech-bb.com
support@advantech-bb.com
Corporate Headquarters: 707 Dayton Road, PO Box 1040 Ottawa, IL 61350 USA 815-433-5100 Fax 433-5104
European Office: Westlink Commercial Park, Oranmore Co. Galway Ireland +353 91 792444 Fax +353 91 792445
In-line Fiber Optic Modem
Model BB-FOSTC
SERIAL TECHNOLOGY
Data Rate
RS-232
SPECIFICATIONS
RS-232: 115.2 kbps, maximum
RS-422/485: 500 kbps, maximum
RS-422/485
Connector DB25 female (DCE)
Signals TD, RD, GND
POWER
Source
Input Voltage
Range DC
Connections
Connector DB25 female (DCE)
RS-485, 2-wire
Data A(-), Data B(+), GND
RS-422/485, 4-wire
TDA(-), TDB(+), RDA(-), RDB(+), GND
FIBER OPTIC TECHNOLOGY
Transmission Line
Dual, multi-mode glass optical cable
Connector
ST
Wavelength
820 nm
Size Options
50/125, 62.5/125, 100/140, 200 µm
Output Power
(-) 17 to (-) 10 dBm
Receive Sensitivity
(-) 25.4 dBm to (-) 24 dBm
Cable
62.5/125 micro-meter
Data Rate
9.6 to 115.2 kbps
Maximum Distance
4 km (2.5 mi)
FIBER COMMUNICATION MODES
Point-to-Point
Asynchronous, half or full-duplex
Transmission
Multi-Drop Transmission Asynchronous, half duplex fiber ring
Power Consumption
MECHANICAL
Dimensions
11 x 5.9 x 2.5 cm (4.3 x 2.3 x 0.95 in)
Enclosure
Plastic, Inline
ENVIRONMENTAL
Operating Temperature
-40 to +80 °C (-40 to +176 °F)
Storage Temperature
-40 to +85 °C (-40 to +185 °F)
MTBF
570522
MTBF Calculation Method Parts Count Reliability Prediction
APPROVALS / CERTIFICATIONS - BB-FOSTC
FCC Part 15, CISPR, EN 55022 + AC:2011 Class A Emissions
CE
EN 61000-6-1 Generic Standards for Residential, Commercial and Light-Industrial
Environments
External
12 VDC
10 to 14 VDC
2.5mm phone jack (tip positive) or
DB25 pins 25(+) & 12(-)
1.7 W maximum, 1 W typical
orders@advantech-bb.com
support@advantech-bb.com
Corporate Headquarters: 707 Dayton Road, PO Box 1040 Ottawa, IL 61350 USA 815-433-5100 Fax 433-5104
European Office: Westlink Commercial Park, Oranmore Co. Galway Ireland +353 91 792444 Fax +353 91 792445
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