B&B Electronics FOSTCDRI-INV - Quick Start Guide User Manual
Product overview, Set dip switch 12, Power the converter
If you wish to enable termination, refer to:
http://www.bb-elec.com/technical_library.asp
For baud rates not listed above, refer to:
http://www.bb-elec.com/technical_library.asp
FO RX
FO TX
FO RX
FO TX
FO RX
FO TX
FO RX
FO TX
FO TX
FO RX
SW 1-12
OFF
SW 1-12
OFF
SW 1-12
ON
SW 1-12
ON
SW 1-12
ON
Set DIP Switches for Baud Rate
Set DIP Switches for RS-232/422/485 Mode
Wire the Converter
OFF = Point-to-Point
LED Indicators
Set DIP Switch 12
Product Overview
Serial Terminal Block Settings
Conversion
& Timeout
Point-to-Point
Multi-drop Ring
FOSTCDRi
Conversion
& Timeout
FOSTCDRi
Conversion
& Timeout
FOSTCDRi
Conversion
& Timeout
FOSTCDRi
Conversion
& Timeout
FOSTCDRi
ON = Multi-drop Ring
D
TD
RD
GND
A
E
B
C
TD
RD
GND
Computer
Your Device
FOSTCDRi
Field Device
Your Device
FOSTCDRi
DTE
DCE
D
A
E
B
C
Additional tech notes on RS-422/485 connections are located at:
http://www.bb-elec.com/technical_library.asp
D
A
E
B
C
RS-485 2-Wire
Your Device
FOSTCDRi
RS-485 4-Wire
Your Device
FOSTCDRi
D
A
E
B
C
RS-232
RS-422/485
RD B (+)
RD A (-)
GND
TD B (+)
TD A (-)
TD/RD B (+)
TD/RD A (-)
GND
Additional tech notes on RS-232 DTE/DCE connections
are located at:
http://www.bb-elec.com/technical_library.asp
• Input Voltage 10-48 VDC (56 VDC max)
• Power Consumption 0.5 W (Typical),
1.3W Max
• Duplex multi-mode fiber with ST connectors
• Fiber cable specs needed:
62.5/125 micro-meter, 820 nm wavelength
Power the Converter
• Input Voltage 10-48 VDC (56 VDC max)
• Power Consumption 0.5 W (Typical), 1.3W Max
Multi-drop mode allows one serial device to communicate
with up to 31 others around a fiber optic ring. Data will repeat
around the ring until it finally reaches its source. When the
data is received by the originator, timeout circuitry will prevent
it from being re-transmitted.
Switch Selectable Timeouts
Baud
DIP Switch Position
Timeout
8
9
10
11
9.6 K
OFF OFF OFF ON 1.3 ms
19.2 K
OFF OFF ON OFF .56 ms
38.4 K
OFF ON OFF OFF .27 ms
57.6 K
ON OFF OFF OFF .22 ms
76.8 K
ON OFF ON
ON .14 ms
115.5 K
ON
ON
ON OFF .10 ms
DIP Switch Position
Mode
1
2
3
4
5
6
7
RS-485 2-Wire, Half-duplex
ON
ON
ON
ON
OFF
ON
OFF
RS-485 4-Wire, Full-duplex
ON
OFF
OFF
OFF
OFF
OFF
OFF
RS-422 Full-duplex
OFF
OFF
OFF
OFF
OFF
ON
OFF
Terminal
RS-485
2-Wire
RS-422/485
4-Wire
RS-232
A
GND
GND
GND
B
Data B (+)
RD B (+)
******
C
Data A (-)
RD A (-)
RS-232 Data
Input
D
******
TD B (+)
******
E
******
TD A (-)
RS-232 Data
Output
Receive
Red, ON when data received on fiber
Transmit
Red, ON when data sent on fiber
Power
Red, ON when power applied
Maximum Converters in a Fiber Ring
Baud Rate
RS-232
RS-422/485
19.2 kbps and lower
32
32
38.4 kbps
16
24
115.2 kbps
2
8
1
2
3
5
6
Multi-drop Mode
4