![background image](http://html1.mh-extra.com/html/omron/sysmac-cj1w-scu21-v1/sysmac-cj1w-scu21-v1_operation-manual_743586496.webp)
467
E5
@
K Digital Controller Read Protocol
Appendix F
RS-485 Connection
Note
1.
The communications configuration is a one-to-one configuration or a one-to-N configuration. In the
one-to-N configuration, up to 32 units including the Serial Communications Unit/Board can be con-
nected.
2.
The maximum cable length is 500 m. Use a shielded twisted-pair cable for the cable (AWG28i or
greater).
3.
Connect a terminator only at both ends of the transmission path. For instance, in the example shown
below, connect a terminator to the Serial Communications Unit/Board and unit No. 30 and do not con-
nect any terminator to units No. 0 to No. 29. Use a resistance of 120
Ω
(1/2 W) for the terminators
(the total resistance of both ends must be 54
Ω
or more).
RS-485 port
E5
#
K
E5
#
K
E5
#
K
Up to 31 units can be connected.
→
→
→
Serial Communications Board
(CS Series only)
Serial Communications Unit
(CS/CJ Series)
RS-485
RS-485
RS-485
PLC PS
Terminator (120
Ω
, 1/2 W)
A<B: [1] Mark
A>B: [0] Space
Serial Communications Board/Unit
Pin No.
Shielded cable
E5CK (No. 30)
Terminal No.
Terminal No.
E5CK (No. 0)
RS-485: D-sub
9 pin female
RS-485: Terminal block
RS-485: Terminal block
1
2
FG
13
14
A
B
13
14
A
B
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...