Host Connections By Rs-232C (Nt20-St128); Host Computer Communications Settings; Connector Pin Arrangement - Omron NT20S-ST121B-EV3 User Manual

Host Connections by RS-232C (NT20-ST128)

2-8

Host Connections by RS-232C (NT20-ST128)

2-8-1

Host Computer Communications Settings

Note
2-8-2

Connector Pin Arrangement

NT20 Interface Unit
Connect the NT20-ST128 with an RS-232C Interface Unit installed to the host
computer with an RS-232C cable.
An RS-232C connection allows a single NT20 to be connected to the host.
A computer or other control device with a built-in RS-232C interface is a suit-
able host for connection to the NT20.
Set the host communications conditions according to the following table.
Item
Baud rate Set to the same baud rate as the NT20: 2400, 4800, 9600, 19200
Data bits 7 bits/8 bits
Stop bits 1 bit/2 bits
Parity Even, Odd, None
Flow control RS/CS control
XON/XOFF control
None
Set the same communications conditions at the NT20 and Host.
Refer to the appropriate instruction manuals for the method of setting the Host
communications conditions.
Set to the maximum baud rate supported by both the NT20 and Host.
The communications condition settings of the NT20-ST128 are set with the
RS-232C communications conditions memory switches.
The RS-232C connection between the NT20 and Host is described below.
The connector specifications are described below.
Electrical characteristics: Conforms to EIA RS-232C specifications.
Signal direction: Signal input and output are relative to the host computer.
Connector Signal name
pin #
2 Send data
3 Receive data
4 Request to send
5 Clear to send
Setting
1 6
5 9
Abbreviation
→
SD (TXD)
←
RD (RXD)
→
RS (RTS)
←
CS (CTS)
Section 2-8
Signal direction
NT20 ← → Host
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