Hi all,

We've got these Intellicentre MCC's with DeviceNet cables all wired up. However, we did not get any drawings to show the route of these DNet cables.

As the end panel (an incomer panel) was open today, I was fortunate enough to look inside and see a Flat DNet cable doing a loop at about waist height (ie running from one face of the MCC and then looping back to the other face). What surprised me tho was the height of the flat DNet cable because if its the trunk, shouldn't it be running on the top of the MCC so that each dropline that comes off it will run from the top starter panels to the bottom panels?

Another query is, where in the MCC panel do I connect my DNet connector from my CLX DNet card?
I've looked at connecting it in one of the female DNet plugs in the side cable panels but aren't they the drop lines?
I thought that PLC connections into a DNet Network should occur via a tap in the main trunk and not on droplines or branches, otherwise it will not work?

Can someone confirm that PLC connection into a branch or dropline of a DNet network will work and that my scanner will subsequently pick up all nodes?!

There should be some interconnection instructions with the MCC, I think, that illustrate joining the DeviceNet trunk at the shipping splits (where you also join the AC bus bars).

Allen-Bradley MCCs use a flat cable trunk in a "serpentine" manner, where it runs vertically behind the vertical wireway. There's a good overview in the Technical Data publication "DeviceNet Motor Control Centers", publication number 2100-TD019.

You plug in your scanner either to an extension of the trunk cable or into one of the wireway plugs. This is most common when your scanner is in an MCC bucket.

Scanners do not have to be connected directly to the trunkline.

You will install one termination resistor at each end of the trunkline. The resistors and some plugs to mount them in are included in baggies tied inside vertical wireways.

This is another good source of info for devicenet hardware configuration.
http://www.odva.org/portals/0/library/Publ..._Print_Copy.pdf