Specifications

Serial Media Converters >
Device Connectivity
13-19
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Device Connectivity
TCC-80/80I Series
13
Introduction
Port Power over RS-232
Port-powered RS-232 to RS-422/485 converters with optional
2.5 KV isolation
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.
External Power Adaptor USB Power
TCC-80/80I Series
› External power source supported but not required
› Compact size
› Converts RS-422, and both 2-wire and 4-wire RS-485
› RS-485 automatic data direction control
› Automatic baudrate detection
› 15 KV serial ESD protection
› Built-in 120-ohm termination resistors
› 2.5 KV isolation (for TCC-80I only)
› LED port power indicator
TxD
RTS
DTR
Long Range/
Terminated
RS-422/485
Connection
Power Adaptor
Power over TXD
RS-422/485
Devices
TxD
USB Port Power Cord
Long Range/
Terminated
RS-422/485
Connection
TxD
RTS
DTR
TCC-80-DB9
TCC-80
TCC-80I
TCC-80I-DB9
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