Serial Interface

Precautions for Connecting Serial Interface

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.

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

DANGER
ELECTRIC SHOCK AND FIRE When using the SG terminal to connect an external device to this product: Verify that a ground loop is not created when you set up the system. Connect the SG terminal to remote equipment when the external device is not isolated. Connect 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.

DANGER

ELECTRIC SHOCK AND FIRE

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

Verify that a ground loop is not created when you set up the system.
Connect the SG terminal to remote equipment when the external device is not isolated.
Connect 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 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.

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).

COM2 (RS-422/485)

D-Sub 9 pin plug connector

Product side:

Pin No.	RS-422/485
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	ERA	Output	Data terminal ready A (+)
5	SG	–	Signal ground
6	CSB	Input	Send possible B (-)
7	SDB	Input	Data terminal ready B (-)
8	CSA	Output	Send possible A (+)
9	ERB	Output	Data terminal ready B (-)
Shell	FG	–	Frame ground

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