Serial Interface - Harmony ST6

Introduction

The serial interface is not isolated.

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 HMIST6200, you can switch the communication method between RS-232C and RS-485 via the software.

The SG (signal ground) and FG (frame ground) terminals are separated inside this product.

DANGER
ELECTRIC SHOCK Make a direct connection between the FG (frame ground) terminal and ground. Do not connect other devices to ground through the FG (frame ground) terminal of this device. Install all cables according to local codes and requirements. If local codes do not require grounding, follow a reliable guide such as the US National Electrical Code, Article 800. Failure to follow these instructions will result in death or serious injury.

DANGER

ELECTRIC SHOCK

Make a direct connection between the FG (frame ground) terminal and ground.
Do not connect other devices to ground through the FG (frame ground) terminal of this device.
Install all cables according to local codes and requirements. If local codes do not require grounding, follow a reliable guide such as the US National Electrical Code, Article 800.

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

CAUTION
LOSS OF COMMUNICATION Do not put excessive stress on the communication ports of all connections. Securely attach communication cables to the panel wall or cabinet. Use only D-Sub 9 pin cables with a locking tab in good condition. Use a RJ45 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.

HMIST6200 COM1 (RS-232C/485)

RJ45 connector

Pin No.	RS-232C/RS-485
Pin No.	Signal name	Direction	Meaning
1	RD (RXD)	Input	Receive data (RS-232C)
2	SD (TXD)	Output	Send data (RS-232C)
3	NC	–	No connection
4	D1	Input/Output	Transfer data (RS-485)
5	D0	Input/Output	Transfer data (RS-485)
6	RS (RTS)	Output	Request to send
7	NC	–	No connection
8	SG	–	Signal ground
Shell	FG	–	Frame ground

HMIST64/65/66/6700 COM1 (RS-232C)

D-Sub 9 pin plug connector

Product side:

Pin No.	RS-232C
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	VCC	Output	+5 Vdc ±5% Output 0.25 A^*1
Shell	FG	–	Frame ground

*1 When using RS-232C pin #9, enable VCC with the software.

Recommended jack screw is #4-40 (UNC).

HMIST64/65/66/6700 COM2 (RS-485)

RJ45 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.

Pin No.	RS-485
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 (+)
5	Line B	Input/Output	Transfer data (-)
6	RS (RTS)	Output	Request to send
7	NC	–	No connection
8	SG	–	Signal ground
Shell	FG	–	Frame ground