Omron CP1E-E14SDR-A - A-3-4 Reducing Electrical Noise for External Wiring

Appendices
A-48
CP1E CPU Unit Hardware User’s Manual(W479)
z Wiring for the Recommended Cables (XW2Z-070T-1 or XW2Z-200T-1)
* DR and ER signals are not supported by the NS(1)-type CPU Unit.
Note The hood (FG) is internally connected to the ground terminal (GR) on the CPU Unit.
Therefore, FG is grounded by grounding the ground terminal (GR) on the power supply termi-
nal block.
Precautions for Correct UsePrecautions for Correct Use
• The XW2Z-0T-1 Connecting Cables for the NT-AL001 Link Adapter uses special wiring for
the DS and RS signals.
Do not use these signals with other devices.
Connecting this cable to other devices can damage them.
• Always turn ON the terminating resistance if the node is at the end of the RS-422A/485 trans-
mission path.
Observe the following precautions when wiring communications cables.
• When multi-conductor signal cable is being used, avoid combining I/O wires and other control wires
in the same cable.
• If wiring racks are parallel, allow at least 300 mm between them.
• If the I/O wiring and power cables must be placed in the same duct, they must be shielded from each
other using grounded steel sheet metal.
A-3-4 Reducing Electrical Noise for External Wiring
1
3
2
4
5
6
7
8
9
FG
SD
SD
RD
RD
RS
CS
+5V
DR*
ER*
SG
FG
RS
CS
+5V
DR
ER
SG
FG
1
2
3
4
5
6
7
8
9
Pin Signal PinSignal
SYSMAC PLC
NT-AL001 end (inside NT-AL001)
Hood Hood
Loopback
Loopback
*Arrows indicate
signal directions
Wiring with XW2Z-0T -1 (10 conductors)
Not used.
Shield
Communications
cables
Low-current cables
PLC power supply
and general control
circuit wiring
Power lines
300 mm min.
Ground to 100 Ω or less.
Control cables
Power cables
300 mm min.
Communications
cables
PLC power supply
and general control
circuit wiring
Power lines
200 mm min.
Ground to 100 Ω or less.
Steel sheet metal