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Power for the Powered RS-232 DB9 connectors are supplied from
4-pin connector located on the PCB. This connectors allows a PC
CD-ROM type power supply connector to provide the higher currents
required by the power peripherals.
In order to get efficient intake current output, there is one set of 4-pin
power connector designed on the board. The 4-pin power set draws
both +12VDC and +5VDC power output for powered RS-232 device
using.
Note: If system’s power supply can not provide the efficient power to
serial devices, it will cause your PC system unstable or unexpected
reboot.
2.2 Jumper Settings
This powered RS-232 board supports DC power output to device
feature. You can 5V or +12VDC power output to serial device
over DB 1
st
, 4
th
, 8
th
and 9
th
pin. Please follow the jumper settings
before using each COM port.
