Proface LT4300M - 5.7 Modular HMI + Control" - Manual (Page 124)

Communication Interface
124
Serial Interface (COM1)
Introduction
The serial interface is used to communicate with devices supporting the Modbus protocol as a
master.
To enable communications through serial links, the LT includes an RS-232/485 serial link.
Serial Port Connector
The figure shows the location of the RJ45 serial port on the rear module:
Do not confuse the RJ45 serial port with the RJ45 Ethernet interface.
RS-232C Characteristics
NOTE: The maximum baud rate for the serial link port depends on the protocol used.
RS-485 Characteristics
Characteristic Description
Connector type RJ45
Isolation None
Maximum baud rate 115,200 bps
Cable Type Shielded
Maximum length 15 m (49 ft)
5 Vdc power supply for RS-485 No
Characteristic Description
Connector type RJ45
Isolation None
Maximum baud rate 115,200 bps
Cable Type Shielded
Maximum length 200 m (656 ft)
Polarization Setting is required via software when connecting Multiple LTs.
Refer to the "GP-Pro EX Device/PLC Manual" for the setting.
5 Vdc power supply for RS-485 No