Aport-211S User Guide
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2.7 Serial Port Pin Assignments
Serial Port COM1 uses a Male DB9 connector and it includes RS-232, RS-422 and RS-485 signal
and pin assignments are described as follow:
Pin No.
Transmission Signals
RS-232
4-wire RS-485
RS-485
1
DCD
TxD-
-
2
RxD
TxD+
-
3
TxD
RxD+
Data+
4
DTR
RxD-
Data-
5
GND
GND
GND
6
DSR
-
-
7
RTS
-
-
8
CTS
-
-
9
-
-
-
2.8 Digital I/O
Digital I/O uses DB9 connector and the pin assignments are described as follow:
Pin 1:
DIO0
Pin 2:
DIO1
Pin 3:
DIO2
Pin 4:
DIO3
Pin 5:
DIO4
Pin 6:
DIO5
Pin 7:
DIO6
Pin 8:
DIO7
Pin 9:
GND
DIO0 to DIO5 are TTL compatible Programmable DIO and DIO 6 to DIO7 are CMOS compatible
Programmable DIO. All the DIO channel are pull up +5VDC with a 4.7K Ohm resistor.
Summary of Contents for Aport-211S
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