B&B Electronics FOSTCDRI Leaflet

p/n 7209r004 FOSTCDRI 3409ds-1/2 

© 2009 by B&B Electronics. All rights reserved. 

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B&B 

ELECTRONICS 

     

PRODUCT INFORMATION

 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

 

RS-232 TD, 

RD, 

GND 

RS-485 2-Wire 

Data A(-), Data B(+), GND 

RS-422/485 4-Wire 

TDA(-), TDB(+), RDA(-), RDB(+), GND 

Serial Connector 

5 Position, Removable Terminal Block 

Data Rate 

9.6 to 115.2 kbps 

Isolation 

2KV RMS, 1 minute 

Surge Protection 

600 W Peak Power Dissipation 

 

Clamping time < 1 pico-second 

Industrial Bus 

MODBUS ASCII/RTU 

Bias 

Built-in, Switchable, 1.2KΩ 

Termination 

Built-in, Switchable, 120Ω 

 

Type / Wavelength 

Multimode / 820 nm  

Output Power 

-16dBm min, -12dBm typical, -9dBm max 

Receive Sensitivity 

-24dBm min, -25.4dBm max 

Cable  

62.5/125 micro-meter 

Connector ST 
Data Rate 

9.6 TO 115.2 kbps 

Maximum Distance 

2.5 miles (4 km) 

Idle State 

Transmitter Light ON 

Source  

External  

Power Connector 

2 Position, Removable Terminal Block 

Input Voltage 

10 to 48 VDC (56 VDC max) 

Power Consumption 

0.5 W (Typical), 1.3W (With Termination) 

 

Wire Size Accepted 

28 to 12 AWG 

Pitch 5.08 

mm 

Insulation Resistance  ≥ 500 MΩ @ 500 VDC 
Maximum Torque 

5 Kg / cm 

 

Power Red 

LED 

FO Receive 

Red LED 

FO Transmit 

Red LED 

Dimensions 

4.9 x 4.5 x 1.3 in (12.3 x 11.3 x 3.2 cm) 

Enclosure 

IP 20 Plastic, 35 mm DIN Mount 

Weight 

0.44 lbs (199.6 g) 

MTBF 

138904  hours 

MTBF Calc. Method 

Parts Count Reliability Prediction 

Op Temperature 

- 40 to 80°C (-40 to 176°F) 

Storage Temp 

- 40 to 85°C (-40 to 185°F)  

Op Humidity 

0 to 95% Non-condensing 

Approvals FCC, 

CE, 

 

 

UL Class 1 DIV 2 Groups A, B, C, D 

UL File Number 

E222870 (HAZLOC E245458) 

 

FOSTCDRI 

Serial to Multimode fiber optic converter 

 

Power Supply 

MDR-20-24 or PS5R-SC24 (C1 D2) 

 

 

 

 

FOSTCDRI 

Industrial Serial to Multimode Fiber Converter 

9

  Data Rates up to 115.2 kbps 

9

  10 – 48 VDC Input Power Range 

9

  Wide Operating Temperature 

9

  3-Way 2000V Optical Isolation  

9

  MODBUS ASCII/RTU Compatible 

9

  EMI / RFI Protection 

9

  UL Class 1 DIV 2 

9

  Built-in, Switchable Termination & Bias 

 

The FOSTCDRI is our premium Industrial Serial to Multi-

mode Fiber Optic Converter. Designed for rugged industrial 

environments, it is UL approved and certified for use in Class 

1 Division 2 environments. In addition to direct point-to-point 

connectivity, it is capable of operating in a multi-drop mode. 

This allows one serial device to communicate with up to 31 

others around a fiber ring. Since it supports mixed standards, 

you can replace other converters and isolators and add the 

EMI / RFI protection inherent to fiber optic communications.  

 

In RS-232 mode, the converter supports transmit and 

receive data. Handshaking signals are not passed through. An 

Automatic Send Data Control circuit controls the RS-422/485 

driver chip, eliminating the requirement for external software.  

 

Easy to install and configure, it has a 12 position DIP 

Switch on the bottom to configure RS-422/485 parameters. 

The serial data and power cables connect to removable 

terminal blocks. ST connectors are used for the fiber. 

 

Remember, when it comes to reliable communications in 

harsh duty industrial environments, B&B Electronics ILinx™ 

brand is your number one choice.