Wiring For Serial Communications; A-3-1 Recommended Rs-232C Wiring - Omron SYSMAC CP Series User Manual

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Wiring for Serial Communications

A-3-1 Recommended RS-232C Wiring
Recommended RS-232C Wiring
We recommend the following wiring method for the RS-232C, especially in environments prone to
noise.
1
Use shielded twisted-pair cables for the communications cables.
• Recommended RS-232C Cables
UL2464 AWG28x5P IFS-RVV-SB (UL product)
AWG28x5P IFVV-SB (non-UL product)
UL2464-SB (MA) 5Px28AWG (7/0.127) (UL product)
CO-MA-VV-SB 5Px28AWG (7/0.127) (non-UL product)
2
Combine a signal wire and SG (signal ground) wire in a twisted-pair cable.
At the same time, bundle the SG wires at the connectors on Option Board and the remote
device.
3
Connect the shield of the communications cable to the hood (FG) of the RS-232C connector on
the Option Board.
At the same time, ground the ground terminal (GR) of the CPU Unit to 100 Ω or less.
Connection Example
Example: Twisted-pair Cable Connecting SD-SG, and RD-SG Terminals in Host Link Mode
SG signal wires
XM2S-0911-E
CP2E CPU Unit Hardware User's Manual(W613)
Model numbers
Bundle the SG wires
Aluminum foil
Appendices
Manufacturer
Fujikura Ltd.
Hitachi Cable,
Ltd.
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