4-1 1:1 Host Connection
4-2
4-1 1:1 Host Connection
This section describes the methods for connecting the host to serial port A or B of the PT
using RS-232C or RS-422A communications. The connection methods are as follows:
• Direct Connection using RS-232C (Refer to page 3 of this section.)
This is the easiest connection method. OMRON cables with connectors can be used, de-
pending on the host being connected.
RS-232C cable
(15 m max.)
HostPT
• A 1:1 Connection using RS-422A and an NS-AL002 RS-232C/RS-422A Converter (Refer
to page 3 of this section.)
This connection method allows an extended communications distance of up to 500 m.
RS-422A cable
(500 m max.)
NS-AL002
Adapter
PT
Host
The NS-series PTs have two serial ports that can be used simultaneously. Therefore, two
hosts can be connected at the same time. Any combination of devices can be connected to
the PT.
RS-232C cable or
RS-232C/RS-422A Converter
+ RS-422A cable
PT Host 1
Host 2
Serial port A
Serial port B
(See note.)
(See note.)
Note: Each port allows 1:N connection. Both serial ports A and B cannot be connected at the same
time, however, in a 1:N connection. Further, the NS-AL002 Converter can be connected to one
serial port only.
Note • Always tighten the connector screws after connecting communications cables.
• The connector’s pull load is 30 N.
Do not subject the connectors to a greater load than that specified.
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