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735
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.
CP1H CPU Unit
Option Board
Remote device
Shield
Pin
Signal
Signal
A (
−
)
B (+)
CP1H CPU Unit
Option Board
Remote device
Shield
Pin
Signal
Signal
CP1H 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 CPU UNIT - 03-2009
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Страница 34: ...xxxiv Conformance to EC Directives 6...
Страница 70: ...36 Function Blocks Section 1 5...
Страница 584: ...550 Trouble Shooting Section 8 7...
Страница 627: ...593 Sample Application Section 9 12 Network Settings Network Tab Network Settings Driver Tab...
Страница 630: ...596 Sample Application Section 9 12...
Страница 654: ...620 Troubleshooting Unit Errors Section 11 4...
Страница 662: ...628 Replacing User serviceable Parts Section 12 2...
Страница 668: ...634 Standard Models Appendix A...
Страница 698: ...664 Auxiliary Area Allocations by Function Appendix C...
Страница 746: ...712 Auxiliary Area Allocations by Address Appendix D...
Страница 773: ...739 Connections to Serial Communications Option Boards Appendix F Connecting to Unit...
Страница 774: ...740 Connections to Serial Communications Option Boards Appendix F...
Страница 806: ...772 Index...
Страница 808: ...774 Revision History...