Omron Programmable Terminals NT631 Setup Manual page 44

Method for Connection to the Host
Communica- Communica-
tions Type at tions Type at
PT Host
RS-232C RS-232C
RS-422A RS-232C
RS-422A
Combinations of Communications Method and Connection Method
The connection methods that can be used depending on the communications
method used and the communications type for communications between the
NT631/NT631C 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
Convertor unit
PT
(NT-AL001)
RS-422A
(max. 500 m)
1:N connection via a convertor unit
Convertor unit
PT
(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)
Usable Communications
Host
link
❍
Host
❍
Host
RS-232C
(max. 2 m)
×
Host
RS-232C
(max. 2 m)
❍
Host
×
Host
❍: Connection possible × : Connection not possible
Section 2-1
Details
Method
NT NT Mem-
Link Link ory
(1:1) (1:N) link
❍ ❍ ❍
page 73
❍ ❍ ❍
page 82
× ❍ ×
page 86
❍ ❍ ❍
page 115
× ❍ ×
page 119
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