Rockwell Automation 1746-HSCE,D17466.5 High-Speed Counter Module - Manual (Page 50)

Publication 1746-UM006B-EN-P - August 2005
3-6 Installation and Wiring
Important Wiring
Considerations Use the following guidelines when planning the system wiring for the
module:
•
Install the SLC 500 system in a NEMA rated enclosure.
•
Disconnect power to the SLC processor and the module before
wiring.
•
Make sure the SLC 500 system is properly grounded.
•
Group this module and low voltage DC modules away from AC
I/O or high voltage DC modules.
•
Shielded cable is required for high speed input signals A, B, and
Z. We recommend Belden 9503 or equivalent for lengths up to
305 m (1000 ft).
•
When the LS input is driven by an electromechanical device,
route the wiring away from other inputs. In addition, JW1
should be set for the 10 ms filter.
•
When the LS input is driven by a solid state device, use a
shielded cable. You do not have to route the cable away from
other inputs.
•
Shields should be grounded only at the end of the signal source
end of the cable. Ground the shield to the case of the signal
source, so energy coupled to the shield will not be delivered to
signal source’s electronics.