Practical Industrial Data Networks:Design, Installation and ...

356 Practical Industrial Data Networks: Design, Installation and TroubleshootingPractical 11: DeviceNet16. Click on switch and note the results.17. If you have time connect up the other devices and identify the results.18. What is still needed to complete this system? Why? What is one design flawwith the system? How can the design of configurator and controller beimproved?OverviewThe objective of this practical is to give the delegate an opportunity to calculate thecorrect power and cable configurations for DeviceNet.ObjectiveThe delegate will learn how to calculate the current and cable requirement for a sampleDeviceNet network.ImplementationA system is connected up as in the diagram below. Using the relevant table for thickDeviceNet cable length and power capacity calculate whether this will work.What happens when the cable of section 2 is increased in length by another 100 m?Thick Cable Network Current Distribution and Allowable Current LoadingNetwork length in0 25 50 100 150 200 250 300 350 400 450 500metersNetwork length infeetMaximumcurrent in Amps0828 6164 328 492 656 820 984 1148 1312 1476 16405.42 2.93 2.01 1.53 1.23 1.03 0.89 0.78 0.69 0.63Length = 90 metersSection 1 of the NetworkPowerTapLength = 120 metersSection 2 of the Network0.35A 0.55A 0.15A0.18A 1.05A0.65ANode#1Node#2Node#3PowerSupply24VoltsNode#4Node#5Node#6Current S = 1.05 Ampsfor Section 1 of the NetworkCurrent S = 1.88 Ampsfor Section 2 of the NetworkFigure C.5Singles supply – center connected