EH-TP500 Series
Operating Instructions
VER 1.00
19
Connections
5.1. Serial Port
The serial port is used to communicate with the PLC or with another type of controller.
Different electrical standards are available for the signals in the PLC port connector: RS-232, RS-422
and RS-485.
The serial port is software programmable. Make sure you select the appropriate
interface in the programming software.
RS-232
RS-422, RS-485
SERIAL PORT
To operate in RS485 pins 4-3 and
8-7 must be connected externally.
The communication cable must be chosen for the type of device being connected.
Pin
Description
1
GND
2
3
TX
4
RX
5
6
+5V output
7
CTS
8
RTS
9
Pin
Description
1
GND
2
3
CHA-
4
CHB-
5
6
+5V output
7
CHB+
8
CHA+
9