Omron CS1W-CT021, Operation Manual

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A("(*2
Section 2-3
&)
The length of the cable is indicated by ‘xxx’ in centimetres. The following cables
are available:
•
XW2Z-050B (0.5 m)
•
XW2Z-100B (1 m)
•
XW2Z-150B (1.5 m)
•
XW2Z-200B (2 m)
•
XW2Z-300B (3 m)
•
XW2Z-500B (5 m)
The next figure shows how to use the Terminal Block Unit in a typical configuration
together with the CS1W-CT021/CT041 High-speed Counter:
Refer to Appendix B "Using Terminal Block Units with Screw-terminals" for infor-
mation on the numbering of the screw-terminals. You need this information in case
you want to connect the external signals via Terminal Block Units to the High-
speed Counter Unit.
2-3-3 Important Wiring Considerations
Use the following guidelines when planning the system wiring of the Unit:
•
Disconnect the power to the PLC-system before wiring the Unit.
•
Make sure the PLC-system is properly grounded.
•
Use shielded, twisted pair cables and ground the shield when wiring the Coun-
ter Inputs (A, B, Z) and the Digital Inputs. When grounding the shield at the side
of the Unit, use the same reference as the ground terminal of the PLC-Power
Supply is connected to.
•
Make the wiring for the Counter Inputs A, B and Z as short as possible and do
not route the wires parallel to lines that produce a lot of noise, such as high-volt-
age power lines.
•
Try to use a separate stabilised Power Supply for the High-speed Counter Unit
and another Power Supply for other Units.
W902-E2-03.book Seite 36 Donnerstag, 7. Oktober 2004 2:06 14