CTC Union FRM220-NMC, User Manual, Page: 107 / 182

Appendix A
105
The FRM-Serial is designed to provide two clear channels in each direction. In an RS-232 5-wire application,
one channel is used for data transmission while the other may be used as a handshaking line for flow control. The
connected system functionally works like that in the diagram below.
Figure A-? FRM-Serial's logical signal flow
The FRM-SERIAL is a fiber converter solution to extend RS-485 transmission distance up to 2Km over
multimode fiber or up to 120Km over single mode fiber. The converter is equipped with multiple interface circuits,
for connection to RS-232, RS-423, or RS-485/422 (2 or 4 wire).
The FRM-SERIAL secures data transmission over EMI immune fiber at speeds up to 256kbps for RS-232 or up
to 1024kbps for RS-422/485. All media converters are available with connectors for SC, ST or FC. In single mode,
WDM (Wave Division Multiplexing with SC connector) is also available in 20 or 40KM reach which will provide the
ability to transmit and receive data using only a single optical fiber. A unique feature of the FRM-Serial converter is
the use of a common PCB card which may either be used as a standalone converter (FMC series) or placed in the
FRM220 rack.
Data Formats :
RS-485/422 2-Wire
RS-485/422 4-Wire
RS-232 + RTS/CTS 5-Wire
RS-232 3-Wire
RS-423 + RTS/CTS 5Wire
RS-423 3-Wire
TTL 3-Wire
Maximum Baud Rate:
RS-485 1024 kbps
RS-232 256 kbps
RS-423 256 kbps
TTL 1024 kbps
Bit Error Rate :
<10
-11
4 diagnostic LEDs : Power, Data, Test & Fiber linking status
Temperature:
0 - 50
o
C (Operating); 0 - 70
o
C (Storage)
Humidity: Up to 90% non-condensing
Consumption <5W
Dimensions:
138mm x 86mm x 20mm (LxWxH).
Weight: 300g.
Emission Compliance:
FCC part 15 class A, CE EN55022, EN60950.
Optical: ST/SC/FC type
Data: 6-Pole 'Molex type' with detachable screw terminal
Fiber
Data input
Flow control input
Data output
Flow control output
Data output
Flow control output
Data input
Flow control input