Moxa TCC-80 User Manual

w w w. m o x a . c o m

i n f o @ m o x a . c o m

Serial Media Converters

›

›

›

›

›

›

›

›

›

›

The TCC-80/80I media converters provide complete signal conversion 
between RS-232 and RS-422/485, without requiring an external power 
source. The converters support both half duplex 2-wire RS-485 and 
full duplex 4-wire RS-422/485, either of which can be converted 
between RS-232’s TxD and RxD lines. In addition,the TCC-80/80I’s 
15 KV ESD protection guards against damage from electrostatic 
discharge, and the TCC-80I is the world’s first high-speed, port-
powered converter with 2.5 KV isolation. 

The RS-232 port of the TCC-80/80I is a DB9 female socket that can 
connect directly to the host PC, with power drawn from the TxD line. 
Regardless of whether the signal is high or low, the TCC-80/80I can 
obtain enough power from the data line. However, external power can 
be used if the handshake line is not available, if the serial cable is too 
long, or if the RS-232 device is a low power device. For external power, 
a 5 to 12 VDC power supply can be connected using an adaptor or a 
USB power cord.

Automatic data direction control is provided for RS-485. In this 
case, the RS-485 driver is enabled automatically when the circuitry 
senses the TxD output from the RS-232 signal. This means that no 
programming effort is required to control the transmission direction 
of the RS-485 signal. Moreover, the TCC-80I’s patented LED port 
power indicator lets you check whether or not the TCC-80I is receiving 
enough power.