SBC-C41-pITX
SBC-C41-pITX User Manual - Rev. First Edition: 1.0 - Last Edition: 1.1 - Author: A.R./S.B. - Reviewed by M.B. Copyright © 2021 SECO S.p.A.
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5.2.2
USB-to-Serial port converter modules
This optional module can be used to convert one of the internal USB ports available on connector CN18 into a serial port,
which can be of RS-232, RS-422 or RS-485 type (fixed configuration).
Depending on the type of serial port needed, different module configurations are available; moreover, the output of the module
can be available on standard DB-9 male connector or on RJ-45 sockets.
All modules type mounts an FTDI FT232R USB-to-Serial UART interface IC; RS-232 converter module then mounts a Serial
Port RS-232 Transceiver with 15kV ESD protection. Instead, the other converters mount and RS-485/RS-422 transceiver.
In the table on the left are shown the
pinout of DB-9 connector and of RJ-
45 socket for all kind of modules.
120
Ω
termination resistors on
differential pairs are available both on
RS-422 and on RS-485 modules.
Ordering Code
Description
VA13-0000-1100-C0
USB to RS232 serial port converter with DB9 connector
VA13-0000-1200-C0
USB to RS422 serial port converter with DB9 connector
VA13-0000-1300-C0
USB to RS485 serial port converter with DB9 connector
VA13-0000-2100-C0
USB to RS232 serial port converter with RJ-45 connector
VA13-0000-2200-C0
USB to RS422 serial port converter with RJ-45 connector
VA13-0000-2300-C0
USB to RS485 serial port converter with RJ-45 connector
Modules with DB-9 connector
Modules with RJ-45 socket
Pin
Signal RS-232
converter
Signal RS-422
converter
Signal RS-485
converter
Pin
Signal RS-232
converter
Signal RS-422
converter
Signal RS-485
converter
1
DCD#
N.C.
N.C.
1
DTR#
N.C.
N.C.
2
RX
RX-
N.C.
2
CTS#
RX+
N.C.
3
TX
TX-
RX- / TX-
3
N.C.
N.C.
N.C.
4
DTR#
N.C.
N.C.
4
RX
RX-
N.C.
5
GND
GND
GND
5
N.C.
N.C.
N.C.
6
DSR#
N.C.
N.C.
6
TX
TX-
RX- / TX-
7
RTS#
TX+
RX+ / TX+
7
GND
GND
GND
8
CTS#
RX+
N.C.
8
RTS#
TX+
RX+ / TX+
9
RI#
N.C
N.C.
