Moxa Technologies W321 - Manual (Page 22)

ThinkCore W311/321/341 Hardware User’s Manual Hardware Connection Description
Connecting to a Serial Device
Your serial device can plug into the embedded computer’s serial port using a serial cable. Serial
ports P1 to P4 have male DB9 connectors and can be configured for RS-232, RS-422, or RS-485
communication through software. The pin assignments are shown in the following table:
DB9 Male Port RS-232/422/485 Pinouts
1 2 3 4 5
6 7 8 9
Pin RS-232 RS-422
RS-485
(4-wire)
RS-485
(2-wire)
1 DCD TxDA(-) TxDA(-) ---
2 RxD TxDB(+) TxDB(+) ---
3 TxD RxDB(+) RxDB(+) DataB(+)
4 DTR RxDA(-) RxDA(-) DataA(-)
5 GND GND GND GND
6 DSR ---
--- ---
7 RTS --- --- ---
8 CTS --- --- ---
Serial Console Port
The serial console port is a 4-pin pin-header RS-232 port. It is designed for serial console
terminals, which are useful for viewing boot-up messages.
Serial Console Port & Pinouts Serial Console Cable
4
3
2
1
Pin Signal
1 TxD
2 RxD
3 NC
4 GND
SD Slot (W321 and W341 only)
Both the ThinkCore W321 and W341 include an SD slot for storage expansion. The SD slot allows
users to add up to 1 GB of additional memory by inserting a Secure Digital (SD) memory card
compliant with the SD 1.0 standard.
To install an SD card, remove the cover in order to access the slot. Insert the SD card into the slot
and push it in until it clicks. To remove the card, push the card in until it clicks to release, then pull
the card out.
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