BASSO-1010DS_User Manual_Eng_DM v1.0.1

BASSO-1010DS User Manual
7
4. Function
BASSO-1010DS converts RS232 signal to RS422 or RS485 signal and performs the following functions:
1) Converts RS232 to RS422/485
Converts short distance communication RS232 to long distance communication RS422/RS485.
2) Port Powered
This product is designed to operate without external power supply when connected to RS232 connector(DB9) on a
PC or any serial device(additional power connection is required when using RS232 for extended use). However, the
external power input terminals are also ready for use in environments which require extra power.
[Tip]
This product uses the RTS, DTR signals that are output from the RS232 port of a PC or device as power source
when power is not supplied externally(if the cable length is extended or RS232 power specification is insufficient, it
is recommended to use external power).
The Power LED on the converter shows if the power is ON. The power supply part embeds a high capacity condenser
to supply stable power to the converter circuit using RTS and DTR signals. This condenser may not operate for a
shot time(within 0.1 seconds) until it is fully energized. The LED lights up when power is applied to the converter. If
the LED does not illuminate or the color of the LED is not clear, blinks or changes in brightness periodically, please
use an external power source.
3) Terminating Resistance
The built-in terminating resistance allows users to set the terminating resistance(120Ω) to solve the problem if noise
on track causes a communication failure.
(Please refer to 6. Settings for terminating resistance setting method)