Chapter 2 Installation Instruction
20
HSTP3T 15/20KE-C/KEBC-C User Manual
Communication Port
Table 2.14 Pin assignment for communication port
RS_232
RS_485
COMM Set :
Modbus
COMM Set :
SNT
Pin Signal
Description
Pin Signal
1
DCD
Data Carrier Detect
1
485_+
2
TXD
Transmit Data
2
485_-
3
RXD
Receive Data
3
GND
4
DTR
Data Terminal Ready
4
5
GND
Ground
5
6
DSR
Data set Ready
6
7
RTS
Request to Send
7
8
CTS
Clear to Send
8
9
RI
Ring indicator
9
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