Connecting To The Host's Rs-232C Port; Recommended Connectors, Cables And Crimp Terminals - Omron NT21 - SETUP MANUAL 10-2001 Setup Manual

Connecting to the Host's RS-232C Port

5-1-6 Recommended Connectors, Cables and Crimp Terminals

5-2

Connecting to the Host's RS-232C Port

94
To avoid an FG ground loop, do not connect the functional ground of the Link
Adapters to the shielding of the RS-485 cable.
Connectors and Cables Recommended for RS-422A/485
When making an RS-422A/485 connecting cable, as far as possible use the rec-
ommended parts indicated in the table below. When using the memory link
method, however, use a connector that matches with the RS-422A port at the
CPU Unit (PC). Some Units come supplied with one connector and connector
hood.
Check the required parts and prepare them in advance.
Name Model
Connector XM2S-0911-
set S003
Connector XM2A-0901
Connector
XM2S-0911
hood
Cable TKVVBS4P-03
1.25-N3A
(fork type)
Crimp Crimp
terminals
Y1.25-3.5L
(fork type)
Note 1. Always use crimp terminals for wiring.
2. Before connecting or disconnecting cables between devices, make sure
that the power supply to all of the connected devices (NT21, PC, etc.) is
OFF.
Examples of applicable terminals
6.2 mm or less
This section explains how to connect to the host's RS-232C port through an
RS-422A/485 cable. This explanation focuses on connections to OMRON PCs,
although any RS-232C device can be connected using the memory link method.
The following diagram shows a 1:N connection between the RS-232C ports on
several PTs and the RS-232C port on the host through Link Adapters and
RS-422A or RS-485 cable. This connection method can only be used with the
1:N NT Link (standard or high-speed).
Maker
OMRON
9-pin connector
Made by OMRON
9-pin connector
Made by OMRON
Tachii Electric
Wire Co., Ltd.
Japan Solderless
Terminal MFG
Molex Inc.
Fork type
6.2 mm or less
Link Adapters
PT
Link Adapter
RS-422A or RS-232C
RS-485 cable cable
(total length (2 m max.)
500 m max.)
RS-232C cable
(2 m max., not
required with the
NS-AL002.)
Section
Remarks
9-pin connector
Connector and Connector hood
Recommended cable size:
AWG22 to 18 AWG22 t 18
2
(0.3 to 0.75 mm )
Round type
Host
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