Serial Interface

Precautions for Connecting Serial Interface

The serial interface is not isolated. The SG (signal ground) and FG (frame ground) terminals are separated inside this product.

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.

DANGER
ELECTRIC SHOCK AND FIRE 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 AND FIRE

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 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-422/485 (COM)

D-Sub 9 pin plug connector

Product side:

Pin No.	RS-422/RS-485
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	NC	–	No connection
5	SG	–	Signal ground
6	NC	–	No connection
7	SDB	Output	Send data B (-)
8	NC	–	No connection
9	NC	–	No connection
Shell	FG	–	Frame ground

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