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RS-232C and RS-422A/485 Wiring
Section 3-4
3-4-2
Recommended RS-422A/485 Wiring Examples
Recommended RS-422A/
485 Cable
1,2,3...
1.
Always use shielded twisted-pair cables as communications cables.
2.
Connect the shield of the communications cable to the Hood (FG) of the
RS-422A/485 connector on the Serial Communications Board or Unit. At
the same time, ground the ground (GR) terminal of the Power Supply Unit
on the CPU Rack or CS Expansion Rack to 100
Ω
or less.
Note
Always ground the shield only at the Board/Unit 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.
Serial Communications
Board/Unit
Remote device
Shield
Hood
Pin
Signal
Signal
Serial Communications
Board/Unit
Remote device
Shield
Pin
Signal
Hood
Signal
Serial Communications
Board/Unit
Remote device
Signal
Pin
RS-422
interface
Remote device
B500-AL001
Signal
Hood
Signal
Pin
Signal
Pin
Pin
Signal
Signal
Summary of Contents for SYSMAC CJ1W-SCU21-V1
Page 3: ...iv...
Page 5: ...vi...
Page 9: ...x...
Page 15: ...xvi...
Page 89: ...60 Basic Operating Procedure Section 1 9...
Page 151: ...122 RS 232C and RS 422A 485 Wiring Section 3 4...
Page 173: ...144 Host Link Function for Replacing Existing PLCs Section 4 6...
Page 223: ...194 Enhanced Protocol Macro Functions Section 5 6...
Page 277: ...248 Communications Frames Section 6 8...
Page 291: ...262 Basic Operating Procedure in No protocol Mode Section 7 4...
Page 301: ...272 Auxiliary Area and CIO Area Allocations Section 8 3...
Page 391: ...362 Introduction Appendix A...
Page 421: ...392 CompoWay F Master Protocol Appendix B...
Page 513: ...484 E5 K Digital Controller Read Protocol Appendix F...
Page 571: ...542 E5ZE Temperature Controller Write Protocol Appendix I...
Page 587: ...558 E5 J Temperature Controller Protocol Appendix J...
Page 627: ...598 ES100 Digital Controller Protocol Appendix K...
Page 661: ...632 V500 V520 Bar Code Reader Protocol Appendix M...
Page 697: ...668 3Z4L Laser Micrometer Protocol Appendix N...
Page 717: ...688 Visual Inspection System Protocol Appendix O...
Page 755: ...726 V600 V620 ID Controller Protocol Appendix P...
Page 763: ...734 Hayes Modem AT Command Protocol Appendix Q...
Page 767: ...738 Changing Communications Port Settings Using STUP 237 Appendix R...
Page 781: ...752 Revision History...