Omron Programmable Terminals NT631C - Manual (Page 43)

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Method for Connection to the Host Section 2-1
2-1 Method for Connection to the Host
This section describes the methods for connection to the host used with the
NT631/NT631C, and the relationship between the connection method and the
communications method.
NT631/NT631C Communications Ports and Communications Methods
The NT631/NT631C has two communications ports. Their uses are indicated
in the table below.
Note There are two NT Link (1:N) communications rates: standard and high-speed.
Communications Methods That Can Be Used with the Host
The following communications methods can be used with the hosts that can
be connected to the NT631/NT631C.
• RS-232C
• RS-422A
• RS-485
The communications types that are actually supported differ depending on the
host. For details, refer to SECTION 4 Connecting to the Host from the RS-
232C Port and SECTION 5 Connecting to the Host from the RS-422A/485
Port.
Converting the Communications Type with an RS-232C/RS-422A Adapter
The following communications type conversions are possible by using an RS-
232C/RS-422A adapter (NT-AL001, made by OMRON).
• RS-232C
⇔ RS-422A
• RS-232C ⇔ RS-485
Communications Port Usable Communications
Methods
Communications Type
Serial port A Host link
NT Link (1:1)
NT Link (1:N) (See note.)
Memory link
(Support Tool connection)
(bar code reader input function)
RS-232C
Serial port
B Connector Host link
NT Link (1:1)
NT Link (1:N) (See note.)
Memory link
RS-232C
(select between con-
nector and terminal
block)
Terminal
block Host link
NT Link (1:1)
NT Link (1:N) (See note.)
RS-422A/485
(select between con-
nector and terminal
block)