Omron NT31 Operation Manuals page 44

Method for Connection to the Host
Communication Communication
Type at PT Type at Host
RS-232C RS-232C
RS-232C
RS-422A RS-422A
RS-422A
S Combinations of communication method and connection method
The connection methods that can be used depending on the communication
method used and the communication type for communication between the
NT31/NT31C and the host are indicated in the table below.
Usable Connection Method
Direct 1:1 connection
PT
RS-232C (max. 15 m)
1:1 connection via a convertor unit
PT Convertor unit
(NT-AL001)
RS-422A
(max. 500 m)
1:N connection via a convertor unit
PT
Convertor unit
(NT-AL001)
RS-422A
(total length 500 m)
Direct 1:1 connection
PT
RS-422A (max. 500 m)
1:N connection
PT
RS-422A (total length 500 m)
Host
link
Host
Host
RS-232C
(max. 2 m)
Host
RS-232C
(max. 2 m)
Host
Host
f: Connection possible
Section 2-1
Usable Communication
Method
NT NT Mem
Link Link ory
(1:1) (1:N) link
f f f f
f f f f
f
f f f f
f
: Connection not possible
Details
89
99
104
133
139
33