Omron Programmable Terminals NT31 NT31C Setup Manual page 38

Method for Connection to the Host
Communica Communica- Communica Communica-
tion Type at tion Type at
PT Host
RS-232C RS-232C
RS-232C
RS-422A RS-422A
RS-422A
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)
(max. 2 m)
1:N connection via a convertor unit
PT
Convertor unit
(NT-AL001)
RS-422A
(total length 500 m) (max. 2 m)
Direct 1:1 connection
PT
RS-422A (max. 500 m)
1:N connection
PT
RS-422A (total length 500 m)
Usable Communication
Host
link
Host
f
Host
f
RS-232C
Host
RS-232C
Host
f
Host
f: Connection possible
Section 2-1
Method
Details
NT NT
Memory
Link Link
link
(1:1) (1:N)
f f f
79
f f f
88
f
92
f f f
117
f
122
: Connection not possible
27