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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
NT31/NT31C and the host are indicated in the table below.
❍: Connection possible
×: Connection not possible
Commu-
nica-
tions
Type at
PT
Communi-
cations
Type at
Host
Usable Connection Method Usable Communications Method Details
Host
link
NT
Link
(1:1)
NT
Link
(1:N)
Memory
link
RS-232C RS-232C ❍❍❍❍ page 73
RS-422A RS-232C ❍❍❍❍ page 82
××❍ × page 86
RS-422A ❍❍❍❍ page 116
××❍ × page 121
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-232C
(max. 2 m)
RS-422A
(max. 500 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)
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