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77
Communicating with the PLC Using C200H Direct Communications
Section 2-7
• It is not possible to connect a C
@@
H I/O Unit after the NT20. It must be
the final connection in the system.
Note
When connecting a C
@@
H, always install a noise filter.
1.
Insert the noise filter in the power supply line of the C
@@
H.
2.
Make the distance between the noise filter and the C
@@
H as short as pos-
sible and separate it from the power supply line.
3.
Install the noise filter case on the FG face.
4.
Use a ZGB2202-01U (manufactured by TDK) or equivalent as the noise fil-
ter.
2-7-3
Turning the Power ON/OFF When Using C200H Direct
Communications
The NT20-ST121-E functions as an expansion I/O unit of the PLC. Use the
following procedure to turn the power ON and OFF.
!Caution
Depending on the method used to turn the power ON and OFF, the entire sys-
tem may stop. Follow the procedure described below to turn the power ON
and OFF.
Power ON
Turn the power ON as follows:
Turn ON the power to the NT20.
“Connecting to Host” is displayed on the NT20 screen.
I/O Connecting Cable
(C20H-CN
@@
2)
CPU Unit
I/O Connecting Cable
(NT20M-CNP
@@
2
/C20H-CN
I/O Connecting Cable
(C20H-CN
@@
2)
2 Units max.
I/O Unit
I/O Unit
(Rear face of NT20)
Host interface connector
Noise filter
1
2
4
3
+24 V
IN
OUT
24 V
+
–
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 ...