page 1
10/2018
TEDIA
®
USB converters UC-232 and UC-485
page 2
10/2018
TEDIA
®
USB converters UC-232 and UC-485
2. UC-232 Converter
TEDIA UC-232 converter is a tiny isolated converter intended for expanding the number of RS-232 COM
ports using the PC USB peripheral.
The RS-232 circuits are isolated from the USB port; modern circuits providing high tolerance against
inductive overvoltage have been used for the design.
The converters provide two LED indicators; TXD indicates the data are being transmitted (from PC to
the RS-232), while RXD indicates the data are being received (from the RS-232 to PC).
Connecting of the RS-232 signals (TXD, RXD, GND) is realised by a wire terminal allowing easy making
and quick attaching of the line wires. See Fig. 1 or the converter label for the wiring diagram.
Fig. 1. UC-232 Internal Circuit Schematics.
isolation
Tab. 1. UC-232 Converter Specifications.
Supported Signals
TXD, RXD
Transfer Rate
460 kBd max.
Isolation Voltage
2.5 kV
RMS
ESD Protection
8 kV (IEC 61000-4-2, contact discharge)
15 kV (IEC 61000-4-2, air discharge)
Additional Protection
TVS 12V/200W (5A, 8/20 µs pulse, IEC 61000-4-5)
LED Indicators
TXD and RXD
Supply Voltage
5 V (supplied from the PC USB port)
Current consumption
250 mA max.
Dimensions
66 x 20 x 12 mm (inc. terminals and USB connector)
Terminals
1 mm
2
USB controller
FT232R, USB 2.0 Full Speed compatible
