Omron Programmable Terminals NT31 NT31C Setup Manual page 262

Specifications
For an NT Link , 1:1, RS-422A Type
Item
Communications standard
Connector
Number of units connected
Transmission distance
For an NT Link , 1:N, RS-232C Type
Item
Communications standard
Connector
Number of units connected
Transmission distance
* To connect two or more PTs, NT-AL001 units are required. When using an NT-AL001, the specifications are as follows.
• RS-232C cable:
• RS-422A/485 cable: Total length 500 m max.
For an NT Link , 1:N, RS-422A/485 Type
Item
Communications standard
Connector
Number of units connected
Transmission distance
For a High-speed NT Link , 1:N, RS-232C Type
Item
Communications standard
Connector
Number of units connected
Transmission distance
* To connect two or more PTs, NT-AL001 units are required. When using an NT-AL001, the specifications are as follows.
• RS-232C cable:
• RS-422A/485 cable: Total length 500 m max.
For a High-speed NT Link , 1:N, RS-422A/485 Type
Item
Communications standard
Connector
Number of units connected
Transmission distance
252
EIA RS-422A
25-pin D-SUB connector (female) (serial port B)
1:1
Max. 500 m
EIA RS-232C
9-pin D-SUB connector (female) (serial port A)
25-pin D-SUB connector (female) (serial port B)
1:1 to 8
*
Max. 15 m
Max. 2 m
EIA RS-422A/485
25-pin D-SUB connector (female) (serial port B)
1:1 to 8
Max. 500 m
EIA RS-232C
9-pin D-SUB connector (female) (serial port A)
25-pin D-SUB connector (female) (serial port B)
1:1 to 8
*
Max. 15 m
Max. 2 m
EIA RS-422A/485
25-pin D-SUB connector (female) (serial port B)
1:1 to 8
Max. 500 m
Specification
Specification
Specification
Specification
Specification
Appendix A