Advantech PCM-5864, User Manual

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Chapter 2 Installation 29
2.16.5 Audio power source setting (J23)
The PCM-5864/E/L is designed to work with a 5 V power
supply. The audio interface can also function normally under
5V power supply, but most audio controllers require an
independent power source generated from a +12 V power supply.
The independent power source avoids the noise from the other
digital circuits. The PCM-5864‘s audio interface can 12 V
power to provide improved quality audio. This is done via J23.
Table 2-11: Audio power source setting
*+5 V +12 V
J23
* default setting
Configuration of the audio interface is done entirely via the
software utility. You do not have to set any jumpers. Refer to
Chapter 6 for audio setup details.
2.17 COM port connector (CN23)
The PCM-5864/E/L provides four serial ports (COM1, 3, 4:
RS-232; COM2: RS-232/422/485) in one COM port connector.
The COM port connector is a 40-pin, dual-inline, male header. It
provides connections for serial devices (a mouse, etc.) or a
communication network. You can find the pin assignments for the
COM port connector in Appendix C.
2.17.1 COM2 RS-232/422/485 setting (J19, J20,
J21)
COM2 can be configured to operate in RS-232, RS-422, or RS-
485 mode. This is done via J19 and J20.
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