Chapter 2 Hardware Setup
22
RS-232
PIN
SIGNAL
DESCRIPTION
1
DCD
Data Carrier Detect
2
RXD
Receive Data
3
TXD
Transmit Data
4
DTR
Data Terminal Ready
5
GND
Signal Ground
6
DSR
Data Set Ready
7
RTS
Request To Send
8
CTS
Clear To Send
9
VCC_COM1
Voltage select setting by J1
RS-422
PIN
SIGNAL
DESCRIPTION
1
422 TXD-
Transmit Data, Negative
2
422 RXD+
Receive Data, Positive
3
422 TXD+
Transmit Data, Positive
4
422 RXD-
Receive Data, Negative
5
GND
Signal Ground
6
NC
No Connection
7
NC
No Connection
8
NC
No Connection
9
NC
No Connection
RS-485
PIN
SIGNAL
DESCRIPTION
1
485 TXD-
Transmit Data, Negative
2
NC
No Connection
3
485 TXD+
Transmit Data, Positive
4
NC
No Connection
5
GND
Signal Ground
6
NC
No Connection
7
NC
No Connection
8
NC
No Connection
9
NC
No Connection
