767
Connections to Serial Communications Option Boards
Appendix F
Recommended RS-422A/485 Wiring Examples
Use the following wiring methods for RS-422A/485 to maintain transmission quality.
1.
Always use shielded twisted-pair cables as communications cables.
2.
Connect the shield of the communications cable to the FG terminal on the RS-422A/485 Option Board. At
the same time, ground the ground (GR) terminal of the CPU Unit to 100
Ω
or less.
Note
Always ground the shield only at the RS-422A/485 Option Board end. Grounding both ends of the shield
may damage the device due to the potential difference between the ground terminals.
Connection examples are shown below.
• 2-Wire Connections
• 4-Wire Connections
• Using a B500-AL001-E Link Adapter
Model
Manufacturer
CO-HC-ESV-3Px7/0.2
Hirakawa Hewtech Corp.
CP1L-EL/EM CPU Unit
Option Board
Remote device
Shield
Pin
Signal
Signal
A (
−
)
B (+)
CP1L-EL/EM CPU Unit
Option Board
Remote device
Shield
Pin
Signal
Signal
CP1L-EL/EM CPU Unit
Option Board
Remote device
Signal
Pin
RS-422
interface
Remote device
B500-AL001-E
Signal
Signal
Pin
Signal
Pin
Pin
Signal
Signal
RS-422
RS-422
RS-422
Содержание CP1L-EL20DR-D
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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...
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