Serial Interface (COM on Box Module)

Introduction

The serial interface is not isolated. The SG (signal ground) and FG (frame 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: 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.

RS-232C

D-Sub 9 pin plug connector

Product side:

Pin No.	RS-232C
Pin No.	Signal name	Direction	Description
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 (not isolated)
6	DR (DSR)	Input	Data set ready
7	RS (RTS)	Output	Request to send
8	CS (CTS)	Input	Send possible
9	CI (RI)	Input	Called status display
Shell	FG	-	Frame ground (common with SG)

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

RS-422/485

D-Sub 9 pin plug connector

Product side:

Pin No.	RS-422/485
Pin No.	Signal name	Direction	Description
1	RDA	Input	Receive data A (+)
2	RDB	Input	Receive data B (+)
3	SDA	Output	Send data A (+)
4	ERA^*1	Output	Data terminal ready A (+)
5	SG	-	Signal ground (not isolated)
6	CSB^*1	Input	Send possible B (-)
7	SDB	Output	Send data B (-)
8	CSA^*1	Input	Send possible A (+)
9	ERB^*1	Output	Data terminal ready B (-)
Shell	FG	-	Frame ground (common with SG)

^*1 In RS-422, these control signals are available only when HMI mode is selected in UEFI BIOS. Refer to Settings of Serial Interfaces on Box Module.

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