Serial Interface (RS-485) for COM1/COM2

Introduction

NOTE: For information on how to connect controllers and other types of equipment, refer to the corresponding device driver manual of your screen editing software.

On HMIG2U, the serial interface is not isolated. On other Box Modules, the serial interface is isolated. The SG (signal ground) and FG (functional ground) terminals are connected inside this product.

CAUTION

LOSS OF COMMUNICATION

oAll connections to the communication ports must not put excessive stress on the ports.

oSecurely attach communication cables to the panel wall or cabinet.

oUse a RJ-45 connector that has a functional locking tab.

Failure to follow these instructions can result in injury or equipment damage.

NOTE: Use within the rated current.

RS-485

RJ-45 connector

NOTE: When setting up RS-485 communication, the cable diagram for some equipment may require polarization on the terminal side. Change the setting for polarization with your screen editing software.

Product side	Pin No.	RS-485
Product side	Pin No.	Signal Name	Direction	Meaning
	1	NC	–	No connection
	2	NC	–	No connection
	3	NC	–	No connection
	4	Line A	Input/Output	Transfer Data A (+)
	5	Line B	Input/Output	Transfer Data B (-)
	6	RS (RTS)	Output	Request to Send
	7	NC	–	No connection
	8	SG	–	Signal Ground
	Shell	FG	–	Functional Ground