TCC-82 is a signal isolator
that provides bi-directional serial communication
with full electrical isolation between two RS-232
devices. This compact sized isolator isolates
both sides of the connection optically to provide
perfect protection from lightning surges, accidental
high voltage shorts, and most of all, ground
loops.
The built-in, wide range optocouplers are tested
to ensure that they can withstand more than
4
KV rms input to output for 1 minute. This means
that TCC-82 not only meets the requirements
of
general serial data communications, but also
the high standards required by industrial automation
and medical applications. In addition to the
TxD and RxD data lines, TCC-82 also protects
the RTS/CTS handshake lines on its two D-type
connectors.
Independent RS-232 Serial Port Power
TCC-82 has two power inputs, which means
that both sides of the isolator must be powered
independently and separately to maintain the isolation.
Ideally, both sides can derive power directly
from the RS-232 TxD data lines and the RTS/DTR
handshake lines, regardless of whether the signal
is high or low. This also eliminates the requirements
of using external power supplies in most systems.
The configuration of the wires and the entire
system can be maintained easily. If the applications
and devices on one or both sides do not have handshake
lines available, the serial cable is too long,
or low powered serial ports have been used as
the power source, then external USB power cords
or 5 to 12 VDC adapters can be used as an alternative.
 When
connecting TCC-82, it is recommended that all
signals that are outputs be connected. TCC-82
derives power from these signals, even if they
are not used by your system. Care should be taken
when choosing the external power supply if TCC-82's
full 4 KV of isolation is required to operate
correctly. Most of the commercial power supplies
that are available on the market only provide
1500 VAC isolation between the primary and secondary
windings. If both sides of the isolator require
external power, two separate isolated supplies
are required.
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