430
Built-in Analog Input
Section 8-4
Wiring for Analog Inputs
To prevent noise, 2-core shielded twisted-pair cable should be used. And the
shield can be connected to the FG terminal if necessary.
Note
(1) If necessary, connect the shield to the FG terminal to prevent noise.
(2) Separate wiring from power lines (AC power supply lines, high-voltage
lines, etc.)
(3) When there is noise in the power supply line, install a noise filter on the
input section and the power supply.
!Caution
When connecting the analog option board to an outside analog device, either
ground the 0 V side of the PLC’s external power supply or do not ground the
PLC’s external power supply at all. Otherwise the PLC’s external power sup-
ply may be shorted depending on the connection methods of the outside ana-
log device. DO NOT ground the 24 V side of the PLC's external power supply,
as shown in the following diagram.
Application Example
Setting the value for timer T101 in A643 makes it possible to use T101 as a
variable timer with a range of 0 to 100.0 s (0 to 1000). A change in the set
value is reflected with the next scan.
Note
External analog setting input values may vary with changes in the ambient
temperature. Do not use the external analog setting input for applications that
require highly precise set values.
0.4mm
Side
Front
2.5mm
V IN
COM
I IN
Analog
device with
voltage
output
Analog
Input
Unit
+
−
2-core shielded
twisted-pair cable
FG
24 V
0 V
0 V
Non-insulated DC power supply
0 V
Analog Device
FG
FG
FG
Twisted-pair
cable
FG
CPU Unit
0101
A 643
TIMX
Start input
T0101
100.01
Summary of Contents for CP1L-EL20DR-D
Page 3: ...CP1L EL20D CP1L EM30D CP1L EM40D CP1L EL EM CPU Unit Operation Manual Produced July 2017...
Page 4: ...iv...
Page 10: ...x...
Page 22: ...xxii...
Page 34: ...xxxiv Software Licenses and Copyrights 7...
Page 192: ...158 Trial Operation and Debugging Section 5 3...
Page 250: ...216 Automatic Clock Adjustment and Specifying Servers by Host Name Section 6 7...
Page 666: ...632 Trouble Shooting Section 11 7...
Page 696: ...662 Standard Models Appendix A...
Page 805: ...771 Connections to Serial Communications Option Boards Appendix F Connecting to Unit...
Page 806: ...772 Connections to Serial Communications Option Boards Appendix F...
Page 836: ...802 PLC Setup Appendix G...
Page 838: ...804 TCP Status Transitions Appendix H...
Page 840: ...806 Ethernet Network Parameters Appendix I...
Page 842: ...808 Buffer Configuration CP1L EL EM Appendix J...
Page 844: ...810 Ethernet Specifications Appendix K...
Page 851: ...Index 817 work words 118 write protection 447...
Page 852: ...818 Index...
Page 854: ...820 Revision History...
Page 855: ......