Omron NT21 User Manual

1-3SectionSystem Configuration
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The NT631/NT631C has the following two communication ports. (Serial port B
has an RS-422A/485 terminal block as well as an RS-232C connector; use the
memory switch to select the serial communications method.)
• Serial port A:
D-SUB 9-pin connector (female)
For RS-232C use only (The Support Tool and bar code readers can be con-
nected here.)
• Serial port B: Use the memory switch to select RS-232C or RS-422A/485.
Communications Connection Notes
RS-232C
D-SUB 9-pin connector
(female)
Cannot be used for Support Tool
or bar code reader.
RS-422A/485 Terminal block ---
The host can be connected at either of these two ports.
The connection methods for each communication method at the PT and host
sides are indicated below. Make the settings in accordance with the communica-
tion method that can be used with the PC to be connected and the conditions at
the operation site.
Reference: When using an RS-232C/422A Adaptor (NT-AL001) with the host link or 1:1 NT
Link communication method, RS-485 cannot be used. The connection must be
made with RS-232C or RS-422A.
NT631/NT631C

Omron NT21 Specifications

General

Brand	Omron
Model	NT21
Category	Touch terminals
Language	English