Omron NT631C manual Method for Connection to the Host

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.

Communications Port		Usable Communications	Communications Type
		Methods
Serial port A		Host link	RS-232C
		NT Link (1:1)
		NT Link (1:N) (See note.)
		Memory link
		(Support Tool connection)
		(bar code reader input function)
Serial port	Connector	Host link	RS-232C
B		NT Link (1:1)	(select between con-
		NT Link (1:N) (See note.)	nector and terminal
			block)
		Memory link
	Terminal	Host link	RS-422A/485
	block	NT Link (1:1)	(select between con-
		NT Link (1:N) (See note.)	nector and terminal
			block)

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

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