Omron NT31 NT31C manual For an NT Link , 11, RS-422A Type, For an NT Link , 1N, RS-232C Type

SpecificationsAppendix A

For an NT Link , 1:1, RS-422A Type

Item	Specification
Communications standard	EIA RS-422A
Connector	25-pin D-SUB connector (female) (serial port B)
Number of units connected	1:1
Transmission distance	Max. 500 m

For an NT Link , 1:N, RS-232C Type

Item	Specification
Communications standard	EIA RS-232C
Connector	9-pin D-SUB connector (female) (serial port A)
	25-pin D-SUB connector (female) (serial port B)
Number of units connected	1:1 to 8
Transmission distance	Max. 15 m*

* To connect two or more PTs, NT-AL001 units are required. When using an NT-AL001, the specifications are as follows.

• RS-232C cable: Max. 2 m

•RS-422A/485 cable: Total length 500 m max.

For an NT Link , 1:N, RS-422A/485 Type

Item	Specification
Communications standard	EIA RS-422A/485
Connector	25-pin D-SUB connector (female) (serial port B)
Number of units connected	1:1 to 8
Transmission distance	Max. 500 m

For a High-speed NT Link , 1:N, RS-232C Type

Item	Specification
Communications standard	EIA RS-232C
Connector	9-pin D-SUB connector (female) (serial port A)
	25-pin D-SUB connector (female) (serial port B)
Number of units connected	1:1 to 8
Transmission distance	Max. 15 m*

* To connect two or more PTs, NT-AL001 units are required. When using an NT-AL001, the specifications are as follows.

• RS-232C cable: Max. 2 m

•RS-422A/485 cable: Total length 500 m max.

For a High-speed NT Link , 1:N, RS-422A/485 Type

Item	Specification
Communications standard	EIA RS-422A/485
Connector	25-pin D-SUB connector (female) (serial port B)
Number of units connected	1:1 to 8
Transmission distance	Max. 500 m

252