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26
Connecting Link Adapters and RS-422A Converters
Section 2-3
(3) When connecting to several devices using the four-wire method in a 1:N
connection, set pin 6 to ON (with RS control). When connecting using the
two-wire method, set pin 6 to ON (with RS control).
Dimensions
DIP Switch Settings,
Wiring, and Installation
The DIP switch settings must be changed to perform communications accord-
ing to settings other than the default settings.
1.
Remove the DIP switch cover using a flat-bladed screwdriver in the way
shown below.
Note
Press the cover gently while removing it to prevent it from popping out sud-
denly.
2.
Using a fine pair of tweezers or other tool with a fine point, change the set-
tings of the DIP switch pins to match the desired communications condi-
tions.
3.
Be sure to remount the cover after finishing the DIP switch settings.
All the pins are factory-set to OFF.
Wiring the RS-422A/485
Terminal Block
• Use either two-wire or four-wire shielded cable.
Recommended cable: CO-HC-ESV-3P
×
7/0.2 (Hirakawa Hewtech)
38.8
18.2
5.8
34.0
1
2
3
4
5
6
O
N
O
N
Summary of Contents for NT20
Page 1: ...Programmable Terminal Cat No V091 E1 01 NT20 USER S MANUAL ...
Page 2: ...NT series Programmable Terminal User s Manual Produced March 2007 ...
Page 3: ...iv ...
Page 5: ...vi ...
Page 9: ...x TABLE OF CONTENTS ...
Page 15: ...xvi ...
Page 21: ...xxii EC Directives 6 ...
Page 37: ...16 Before Operating Section 1 6 ...
Page 153: ...132 Transferring the Resource Data Section 3 11 ...
Page 185: ...164 Numeral Setting Section 4 8 ...
Page 267: ...246 Key to Programs Section 6 8 ...
Page 281: ...260 Specifications Appendix A ...
Page 285: ...264 Transporting and Storing PTs Appendix C ...
Page 303: ...282 Function Restrictions Depending on the Support Tool Appendix I ...
Page 307: ...286 Index ...
Page 309: ...288 Revision History ...