Omron Programmable Terminals NT631C - Manual (Page 44)

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Method for Connection to the Host Section 2-1
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.
❍: Connection possible ×: Connection not possible
Communica-
tions Type at
PT
Communica-
tions Type at
Host
Usable Connection Method Usable Communications
Method
Details
Host
link
NT
Link
(1:1)
NT
Link
(1:N)
Mem-
ory
link
RS-232C RS-232C ❍ ❍ ❍ ❍ page 73
RS-422A RS-232C
❍ ❍ ❍ ❍
page 82
Ч Ч ❍ Ч
page 86
RS-422A ❍ ❍ ❍ ❍ page 115
Ч Ч ❍ Ч page 119
Direct 1:1 connection
PT Host
RS-232C (max. 15 m)
1:1 connection via a convertor unit
PT Host Convertor unit
(NT-AL001)
RS-422A
(max. 500 m) RS-232C
(max. 2 m)
1:N connection via a convertor unit
PT Host Convertor unit
(NT-AL001)
RS-422A
(total length 500 m) RS-232C
(max. 2 m)
Direct 1:1 connection
PT Host
RS-422A (max. 500 m)
1:N connection
PT Host
RS-422A (total length 500 m)