B&B Electronics FOSTCDRKT Datasheet

Standard Serial to Fiber Optic Converters

FOSTCDR, FOSTCDRKT, FOSTCDR-INV

PRODUCT FEATURES

• Data rates up to 115.2 kbps

• 4 km (2.5 mi) range

• 10 to 30 VDC input voltage

• Wide operating temperature

• 2000V, 2-way isolation

• Modbus ASCII/RTU compatible

• EMI/RFI protection

• TD, RD and Power LED's

The FOSTCDRx line of fiber optic converters are suitable for standard
industrial installations. These converters extend data communications up to
4 km (2.5 mi) and provide two-way optical isolation on the input and output
lines.

Model FOSTCDR industrial serial to multimode fiber optic converter,
provides the most versatile connection possible between any asynchronous
full or half-duplex serial equipment. In addition to direct point-to-point
connectivity, it is capable operating in a multi-drop mode. This allows
one serial device to communicate with up to 31 other devices around a
fiber optic ring. Since the FOSTCDR supports mixed serial standards, you
can replace other converters and isolators and add the EMI/RFI immunity
inherent to fiber optic communications.

An Automatic Send Data Control circuit controls the RS-422/485 driver
chip, eliminating the requirement for special software. Easy to install
and configure, it has an 8-position DIP switch to set up the RS-422/485
parameters and terminal blocks to connect serial signals and power. In
RS-232 mode, it supports Transmit and Receive data. Handshaking signals
are not passed through.

A kit option, Model FOSTCDRKT, conveniently bundles two FOSTCDR
converters with two matched power supplies.

Model FOSTCDR-INV features an “inverted fiber state” and is
suitable for applications requiring the fiber optic light to be Off in
the idle state.

ORDERING INFORMATION

MODEL
NUMBER

FOSTCDR Terminal Block Multi-mode ST 2,000 V
FOSTCDR-INV Terminal Block Multi-mode ST 2,000 V

FOSTCDRKT

ACCESSORIES

MDR-40-24 - DIN Rail Mount Power Supply 24VDC, 1.7 A output power

DFMM-STST-1M - Multimode fiber patch cable ST-ST connectors

SERIAL CONNECTOR FIBER CONNECTOR ISOLATION

Bundled Kit Version, includes:
(2 ) FOSTCDR Converters, (2) MDR-20-24 Power Supplies,
(1) DFMM-STST-1M Fiber Optic 1-Meter Cable

What is the difference between Model FOSTCDR
and Model FOSTCDR-INV?

The FOSTCDR keeps the light in the fiber turned On when no data is
transmitted and the input signal is in the MARK state (idle). If light is lost or
too low, the electrical signals go to the SPACE state. The input signal turns the
light Off/On in step with the data. This model has an indicator for Transmit and
Receive, if no light is received, the RD LED will come on, the RD output will be
positive relative to GND (normally negative), and in RS-422 or RS-485 mode,
no light will set the TD(A)- line high relative to TD(B)+. The usual voltage with
light in the fiber and no signal sets the B line high relative to A (about 4.4 Volts
DC no termination).

The FOSTCDR-INV is the opposite. The fiber is Off in the idle state.

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FOSTCDR, FOSTCDRKT, FOSTCDR-INV_3713ds

SPECIFICATIONS

SERIAL TECHNOLOGY

Data Rate

RS-232

Connector Terminal block (24 to 14 AWG)

RS-422/485

Connector Terminal block (24 to 14 AWG)
RS-485, 2-wire Data A(-), Data B(+), GND
RS-422/485, 4-wire TDA(-), TDB(+), RDA(-), RDB(+), GND

ISOLATION

Rating 2KV RMS, 1 minute
Lines Protected 2-way (input, output lines)
Method Optical

FIBER OPTIC TECHNOLOGY

Type / Wavelength Multi-mode / 820 nm
Output Power (-) 17 to (-) 10 dBm
Receive Sensitivity (-) 25.4 dBm to (-) 24 dBm
Cable 62.5/125 micro-meter
Connector ST
Data Rate 9.6 to 115.2 kbps
Maximum Distance 4 km (2.5 mi)
Idle State Transmitter light ON

POWER

Source External
Input Voltage 10 to 30 VDC
Consumption 1.7 Watts
Connector Terminal block, (24 to 14 AWG)

MECHANICAL DIAGRAM

Dimensional Diagram of FOSTCDR

RS-232: 115.2 Kbps maximum
RS-422/485: 460.8 Kbps maximum

RS-232 TD, RD, GND

Standard Serial/Fiber

Optic Converters

FOSTCDR, FOSTCDRKT, FOSTCDR-INV

INDUSTRIAL BUS

Modbus ASCII/RTU

MECHANICAL

LED Indicators Serial TD, RD, and Power
Dimensions 10.6 x 7.9 x 2.5 cm (4.3 x 2.3 x 0.95 in)
Enclosure 35mm DIN mount, plastic
Weight 182 g (0.4 lbs)

ENVIRONMENTAL

Operating Temperature -40to+80°C(-40to+176°F)
Storage Temperature -40to+85°C(-40to+185°F)
Operating Humidity 0 to 95% non-condensing

APPROVALS / CERTIFICATIONS - FOSTCDR

cULus Recognized, File Number: E222870
FCC Part 15, CISPR, EN 55022: 2010 + AC:2011 Class A Emissions
CE

EN 61000-6-1: 2007 Generic Standards for Residential, Commercial and Light-

Industrial Environments
EN 61000-4-2: 2009 Electro-Static Discharge (ESD)
EN 61000-4-3: 2006 +A1 +A2 +IS1 Radiated Field Immunity (RFI)
EN 61000-4-4: 2012 Electrical Fast Transients-Burst Immunity (EFT)
EN 61000-4-6: 2009 Conducted Immunity

Download complete Declaration of Conformity at www.bb.elec.com

APPROVALS / CERTIFICATIONS - FOSTCDR -INV

UL 508, File Number: E222870
FCC Part 15, CISPR, EN 55022: 2010 + AC:2011 Class A Emissions
CE

MTBF

FOSTCDR 460854 hours
FOSTCDR-INV 138904 hours
Calculation Method MIL 217F Parts Count Reliability Prediction

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