28
Connecting Link Adapters and RS-422A Converters
Section 2-3
RS-422A/485 Cable Shield
Connections
When using the CJ1W-CIF11 (with or without the NT-AL001), connect the sig-
nal lines, shields, and grounds as shown in the following diagram.
2-3-2
Connecting an NT-AL001 Link Adapter
The NS-AL001 Link Adapter connects to serial port A or B of the NT20 with an
RS-232C cable and converts the RS-232C communications to RS-422A or
RS-485. (Serial ports A and B cannot be used simultaneously.)
The NT20 su5 V power (150 mA max.) to the Link Adapter through pin
6 of the RS-232C connector, so an external power supply is not required.
Note
1.
The RS-232C connector is insulated from the RS-422A/RS-485 connector
within the NT-AL001 Link Adapter.
2.
Always turn OFF the NT20’s power supply before installing/removing a
Link Adapter or connecting/disconnecting cables.
PT
PT
PT
LG
GR
CPU Rack
Signal line
CJ1W-CIF11
CJ1W-CIF11
CJ1W-CIF11
RS-422A/485 shield
connected at both ends
CPU Unit
or Commu-
nications
Unit
Power
Supply
Unit
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 ...