Omron NT631 Operation Manuals page 644

Specifications
S For an NT Link (1:1, RS-422A Type)
Item
Communications standard
Connector
Number of units connected
Transmission distance
S 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.
S For an NT Link (1:N, RS-422A/485 Type)
Item
Communications standard
Connector
Number of units connected
Transmission distance
S For a Memory Link (RS-232C Type)
Item
Communications standard
Communications settings
Connector
Number of units connected
Transmission distance
Communications protocol
* When using NT-AL001, specification is as follows:
- RS-232C:
- RS-422A:
640
EIA RS-422A
Terminal block (serial port B)
1:1
Max. 500 m
EIA RS-232C
9-pin D-SUB connector (female) (serial port A, B)
1:1 to 8
*
Max. 15 m
Max. 2 m
EIA RS-422A/485
Terminal block
1:1 to 8
Max. 500 m
EIA RS-232C
Start-stop synchronization
Communications speed:
Data length:
Stop bit:
Parity:
Flow control:
Response:
9-pin D-SUB connector (female) (serial port A, B)
1:1
Max. 15 m*
Memory link
Max. 2 m
Max. total length 500 m
Specification
Specification
Specification
Specification
1200, 2400, 4800, 9600, 19200, 38400bps
7, 8 bits
1, 2 bits
None, even, odd
None, RS/CS, XON/XOFF
Presence/absence
APPENDIX A