507
Analog I/O Units
Section 9-4
Note
(1) Connect the shield to the FG terminal to prevent noise.
(2) When an input is not being used, short the + and
−
terminals.
(3) Separate wiring from power lines (AC power supply lines, high-voltage
lines, etc.)
(4) When there is noise in the power supply line, install a noise filter on the
input section and the power supply terminals.
(5) Refer to the following diagram regarding wiring disconnections when volt-
age input is being used.
For example, if analog input device 2 is outputting 5 V and the same
power supply is being used as shown above, about 1/3, or 1.6 V, will be
applied at the input for input device 1.
Consider the following information on open input circuits when using volt-
age inputs. Either use separate power supplies, or install an isolator at
each input.
If the same power supply is used as shown in the following diagram and
an open circuit occurs at point A or B, an unwanted current flow will occur
as shown by the dotted lines in the diagram, creating a voltage at the
other input of about 1/3 to 1/2. If the 1 to 5 V range is being used, the
open-circuit detection function will not operate. Also, if there is an open
circuit at C, the open-circuit detection function will not operate because
the negative sides are the same.
(6) When external power is supplied (when range codes are set), or when
the power is interrupted, there may be a pulse status analog output of up
to 1 ms. If this status is a problem, take the following measures.
• Turn ON the power to the CP1L-EL/EM CPU Unit, check the operation
status, and then turn ON the power at the load.
• Turn OFF the power to the load and then turn OFF the power to the
CP1L-EL/EM CPU Unit.
A
C
B
Analog
output
device
1
Analog
output
device
2
24 VDC
Содержание CP1L-EL20DR-D
Страница 3: ...CP1L EL20D CP1L EM30D CP1L EM40D CP1L EL EM CPU Unit Operation Manual Produced July 2017...
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Страница 22: ...xxii...
Страница 34: ...xxxiv Software Licenses and Copyrights 7...
Страница 178: ...144 Connecting the CX Programmer Section 5 1 Click the Connect button to connect and then connection online is completed...
Страница 192: ...158 Trial Operation and Debugging Section 5 3...
Страница 250: ...216 Automatic Clock Adjustment and Specifying Servers by Host Name Section 6 7...
Страница 666: ...632 Trouble Shooting Section 11 7...
Страница 696: ...662 Standard Models Appendix A...
Страница 805: ...771 Connections to Serial Communications Option Boards Appendix F Connecting to Unit...
Страница 806: ...772 Connections to Serial Communications Option Boards Appendix F...
Страница 836: ...802 PLC Setup Appendix G...
Страница 838: ...804 TCP Status Transitions Appendix H...
Страница 840: ...806 Ethernet Network Parameters Appendix I...
Страница 842: ...808 Buffer Configuration CP1L EL EM Appendix J...
Страница 844: ...810 Ethernet Specifications Appendix K...
Страница 851: ...Index 817 work words 118 write protection 447...
Страница 852: ...818 Index...
Страница 854: ...820 Revision History...
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