Com port 1 & com port 2, Com port 3 & com port 4 – Solvline Eddy DKV2.1.0.3 User Manual
Page 34
Chapter 3. Development
Environment
34
2.4.4.2. COM Port 1 & COM Port 2
RS232
Pin
Signal
Description
1
DCD
Data Carrier Detection (Input) (COM Port 1 only)
2
RXD
Receive Data (Input)
3
TXD
Transmit Data (Output)
4
DTR
Data Terminal Ready (Output) (COM Port 1 only)
5
GND
Ground
6
DSR
Data Set Ready (input) (COM Port 1 only)
7
RTS
Request to Send (Output)
8
CTS
Clear to Send (Input)
9
RI
Ring Indicator (Input)
2.4.4.3. COM Port 3 & COM Port 4
RS422 Full Duplex
Pin
Signal
Description
1
TXD+
Transmit differential data positive (Output)
2
TXD-
Transmit differential data negative (Output)
3
GND
Ground
4
RXD+
Receive differential data positive (Input)
5
RXD-
Receive differential data negative (input)