Specifications of Serial Interface COM1

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.

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 or cabinet.

oUse only D-Sub 9-pin cables with a locking system in good condition.

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

The serial port is not isolated. The SG (signal ground) and FG (frame ground) terminals are connected inside the panel.

DANGER

ELECTRIC SHOCK

When using the SG terminal to connect an external device to the panel:

oVerify that a short-circuit loop is not created when you set up the system.

oConnect the #5 SG terminal to remote equipment when the host (PLC) unit is not isolated. Connect the #5 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.

Serial Interface COM1

HMIGTO3510 / HMIGTO4310: D-Sub 9-pin plug connector via a RS-232C cable.

Pin Connection	Pin No.	RS-232C
Pin Connection	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 V±5% Output 0.25 A^*1
	Shell	FG	–	Frame Ground (Common with SG)

NOTE: ^*1 You can switch pin number 9 between RI and VCC via software.

NOTICE

EQUIPMENT DAMAGE

Use only the rated current.

Failure to follow these instructions can result in equipment damage.

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 only D-Sub 9 pin cables with a locking tab in good condition.

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