Serial Interface (RS-232C and RS-422/RS-485) for 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.

You can switch the communication method between RS-232C and RS-422/RS-485 via the software.

The serial interface is not isolated. The SG (signal ground) and FG (functional ground) terminals are connected inside this product. When the serial interface connector is D-Sub, connect the FG wire to the shell.

DANGER

ELECTRIC SHOCK AND FIRE

When using the SG terminal to connect an external device to this product:

oVerify that a ground loop is not created when you set up the system.

oConnect the SG terminal to remote equipment when the external device is not isolated.

oConnect the SG terminal to a known reliable ground connection to reduce the risk of damaging the circuit.

Failure to follow these instructions will result in death or serious injury.

CAUTION

LOSS OF COMMUNICATION

oDo not put excessive stress on the communication ports of all connections.

oSecurely attach communication cables to the panel wall or cabinet.

oUse a D-Sub 9 pin connector that has jack screws.

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

NOTE: Use within the rated current.

RS-232C

D-Sub 9 pin plug connector

Product side	Pin No.	RS-232C
Product side	Pin No.	Signal name	Direction	Meaning
	1	CD	Input	Carrier Detect
	2	RD (RXD)	Input	Receive Data
	3	SD (TXD)	Output	Send Data
	4	ER (DTR)	Output	Data Terminal Ready
	5	SG	–	Signal Ground
	6	DR (DSR)	Input	Data Set Ready
	7	RS (RTS)	Output	Request to Send
	8	CS (CTS)	Input	Send possible
	9	CI (RI)/VCC	Input/–	Called Status Display +5 Vdc ±5% Output 0.25 A^*1
	Shell	FG	–	Functional Ground (Common with SG)

*1 You can switch pin #9 between CI (RI) and VCC via the software. The VCC output is not protected against overcurrent. To prevent damage or malfunction, use only within the rated current.

Interfit bracket is #4-40 (UNC).

RS-422/485

D-Sub 9 pin plug connector

Product side	Pin No.	RS-422/RS-485
Product side	Pin No.	Signal name	Direction	Meaning
	1	RDA	Input	Receive Data A (+)
	2	RDB	Input	Receive Data B (-)
	3	SDA	Output	Send Data A (+)
	4	ERA	Output	Data Terminal Ready A (+)
	5	SG	–	Signal Ground
	6	CSB	Input	Send Possible B (-)
	7	SDB	Output	Send Data B (-)
	8	CSA	Input	Send possible A (+)
	9	ERB	Output	Data Terminal Ready B (-)
	Shell	FG	–	Functional Ground (Common with SG)

Interfit bracket is #4-40 (UNC).