Moxa Technologies TV Converter Box RS 232 422 485 to Fiber Converter User Manual

4. Dimensions and Appearance  
RS-232  
TCF-142 fiber converters are easy to set up and use. The serial terminal  
block of one of the converters connects to your computer, the serial  
terminal block of the other converter connects to your serial device, and  
the two converters are connected by fiber cable(s).  
1 2 - 4 8 V  
R S - 2 3 2  
R S - 4 2 2 / 4 8 5  
S e r i a l t o F i b e r C o n v e r t e r  
R S - 2 3 2 / 4 2 2 / 4 8 5  
TCF-142-M(-T), TCF-142-S(-T)  
RS-232/422/485 to Fiber Converter  
Quick Installation Guide  
T C F - 1 4 2 - S  
TCF-142  
F i b e r R x  
T x F i b e r  
P W R  
T x  
R x  
s w  
Tx  
Rx  
Tx  
NOTE Electrostatic Discharge Warning!  
To protect the product from damage due to electrostatic  
discharge, we recommend wearing a grounding device when  
maintaining TCF-142.  
Rx  
Tx  
Rx  
Rx  
Tx  
sw  
Rx  
Tx  
sw  
Rx  
Tx  
sw  
Rx  
Tx  
PWR  
PWR  
PWR  
Fiber Tx  
Fiber Rx  
Fiber Tx  
Fiber Rx  
Fiber Tx  
Fiber Rx  
Eighth Edition, July 2006  
TCF-142-S  
TCF-142-S  
TCF-142-S  
RS-232/422/485  
TCF-142  
RS-232/422/485  
TCF-142  
RS-232/422/485  
TCF-142  
Serial to Fiber Converter  
Serial to Fiber Converter  
Serial to Fiber Converter  
1. Overview  
RS-422/485  
RS-232  
12-48V  
RS-422/485  
RS-232  
12-48V  
RS-422/485  
RS-232  
12-48V  
Introduction  
RS-422  
RS-485  
RS-232  
The TCF-142 series (Ver. 3.1 or later) converters are equipped with a  
multiple interface circuit that can handle RS-232, or RS-422/485 serial  
interfaces, and multi-mode or single-mode fiber. The TCF-142 converters  
extend serial transmission distance up to 5 km (TCF-142-M, with  
multi-mode fiber) or up to 40 km (TCF-142-S, with single-mode fiber).  
The TCF-142 must be configured to transmit a particular serial interface  
(e.g., RS-232 and RS-485 signals cannot be transmitted at the same time).  
Why convert serial to Fiber?  
4
3
1
2
O N  
22.0 mm  
(0.87 in)  
DIP Switch Selectable Terminator  
The termination resistor for many products of this type is set by a jumper  
located inside the product’s casing. To disable or change the resistor’s  
strength, the user must open the casing to reset the jumper. MOXA offers  
a better solution, since TCF-142’s termination resistor is set with a DIP  
Switch located on the outside of the converter’s casing.  
O 6 mm  
(0.24 in)  
O 4 mm  
(0.16 in)  
Fiber communication not only extends the communication distance, but  
also provides many advantageous features.  
IMMUNITY FROM ELECTRICAL INTERFERENCE: Fiber is not  
affected by electromagnetic interference or radio frequency interference.  
It provides a clean communication path and is immune to cross-talk.  
INSULATION: Optical fiber is an insulator; the glass fiber eliminates the  
need for using electric currents as the communication medium.  
SECURITY: Fiber cannot be tapped by conventional electric means and  
is very difficult to tap into optically. Furthermore, radio and satellite  
communication signals can be captured easily for decoding.  
RELIABILITY & MAINTENANCE: Fiber is immune to adverse  
temperature and moisture conditions, does not corrode or lose its signal,  
and is not affected by short circuits, power surges, or static electricity.  
Reverse Power Protection  
The Reverse Power Protection feature provides extra protection against  
accidentally connecting the power cables to the wrong terminal. The  
converter is designed to detect automatically which power wire is positive  
and which is negative, and then adjust the power supply accordingly.  
Ring Mode  
To allow one half-duplex serial device to communicate with multiple  
half-duplex devices connected to a fiber ring, you should configure the  
TCF-142 for “ring mode” by setting DIP switch “SW4” to the “On”  
position. The Tx port of a particular TCF-142 unit connects to the  
neighboring converter’s Rx port to form the ring. Note that when one  
node transmits a signal, the signal travels around the ring until it returns  
back to the transmitting unit, which then blocks the signal. Users should  
ensure that the total fiber ring length is less than 100 km when using  
TCF-142 series converters.  
No Configuration Required for Baudrate Settings  
The TCF-142 works under any baudrate from 300 bps to 921.6 Kbps. The  
TCF-142 simply converts the signal back and forth between serial  
(RS-232, RS-422, or RS-485) and fiber, and since the TCF-142 does not  
need to interpret the signal, it does not need to know the baudrate of the  
transmitting device. For this reason, TCF-142 does not have any DIP  
switches or jumpers for setting the baudrate.  
12.5 mm  
(0.49 in)  
21.3 mm  
(0.8 in)  
O 7 mm  
(0.28 in)  
42.3 mm  
67 mm (2.64 in)  
78 mm (3.07 in)  
(1.67 in)  
2. Features  
y
y
“Ring” or “Point to Point” transmission  
Extend RS-232/422/485 transmission distance:  
> up to 40 km with single-modeTCF-142-S  
> up to 5 km with multi-modeTCF-142-M  
Compact size  
Decrease signal interference  
Protect against electronic degradation and chemical corrosion  
Supports a baudrate up to 921.6 Kbps  
67 mm (2.64 in)  
90.2 mm (3.55 in)  
y
y
y
y
y
5. Wiring Examples  
Connecting the Power Supply  
Before using the TCF-142, you must first connect the DC power supply  
to the power supply terminal block located on the bottom side of the  
TCF-142. The TCF-142 uses a DC power supply.  
Extended operating temperature from -40 to 75°C (for -T models)  
3. Package Checklist  
Before installing the TCF-142, verify that the package contains the  
following items:  
Connecting RS-422 or 4-wire RS-485 Serial Devices  
y
y
y
y
TCF-142-S or TCF-142-M Fiber Converter  
Quick Installation Guide  
7-contact terminal block connector  
GND  
Tx-  
T+  
GND  
R-  
Rx+  
Rx-  
T-  
Rx  
Tx  
Tx  
Rx  
Tx+  
Rx-  
R+  
R-  
GND  
R+  
T-  
T+  
Tx+  
Tx-  
Rx+  
GND  
3-contact terminal block connector  
Serial  
Device  
Serial  
Device  
Notify your sales representative if any of the above items is missing or  
damaged.  
Copper  
Fiber  
Copper  
TCF-142  
TCF-142  
P/N: 1802001420600  
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