Catalogues - devicenet-selection-guide-for-north-american-standards

Catalogue DeviceNet Selection Guide (for North American standards)

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from Woodhead Industries

Woodhead Industries, a Division of Molex "Empowers the Industrial Infrastructure" with innovative communication, control and connectivity solutions for a wide range of DeviceNet applications - from the device and sensor level, to the operations and supervisory level, to connectivity with enterprise business and Pi operations systems.

The success of an Industrial DeviceNet relies on the quality and performance of its

underlying infrastructure - all the devices, components and pathways needed to

support the network's communications, connectivity and control capabilities. Our Brad® automation and networking solutions are engineered to facilitate reliable information flow, from machines to PCs and Plcs, and all the way from the plant

floor to the enterprise.

Brad® Automation Solutions

Our Brad® product lines - including such globally recognized names as Brad Harrison®, applicom®, SST™, mPm®, and RJ-Lnxx® - are designed and built industrial-tough to ensure the flexibility, interoperability and rock-solid performance of your DeviceNet applications. Our industrial network solutions include:

■ BradCommunications™ - Network interface cards, PLC backplanes, switches,

gateways, simulation software, diagnostic tools and embedded software stacks

■ BradConnectivity™ - Connectors, cordsets and distribution boxes for sensor, actuator and bus network applications

■ BradControl™ - Network I/O for on-machine and in-cabinet applications

■ BradPower™ - Modular wiring systems for machine power distribution and

motor control

Woodhead Industries, a Division of Molex, operates from 21 locations in 10 countries spanning North America, Europe and Asia/Pacific, so we have the resources to assist you locally with all of your DeviceNet project needs.

DeviceNet Overview*


	Network Size	Up to 64 Nodes
	Network Length	Selectable end-to-end network distance
		varies with speed:
		125 Kbps 500 m (1,640 ft)
		250 Kbps 250 m (820 ft)
		500 Kbps 100 m (328 ft)
	Data Packets	0-8 bytes
	Bus Topology	Linear (trunkline/dropline); power and
		signal on the same network cable
	Bus Addressing	Peer-to-Peer with Multi-Cast (one-to-
		many); Multi-Master and Master/Slave
		special case; polled of change-of-state
		(exception-based)
	System Features	Selectable end-to-end network distance varies with speed

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Zero Drop Short Drops

Thick or thin cable can be used for either trunklines or droplines. End-to-end network length varies with data rate and cable thickness as shown below:

Network Size 125 KBPS 250 KBPS 500 KBPS

DeviceNet is a digital, multi-drop network that connects and serves as a communication network between industrial controllers and I/O devices. Each device and/or controller is a node on the network. DeviceNet is a producer-consumer network that supports multiple communication hierarchies and message prioritization. DeviceNet systems can be configured to operate in a master-slave or a distributed control architecture using peer-to-peer communication. DeviceNet systems offer a single point of connection for configuration and control by supporting both I/O and explicit messaging. DeviceNet also has the unique feature of having power on the network.


Thick Trunk Length	500 m (1,640 ft)	250 m (820 ft)	100 m (328 ft)
Thin Trunk Length	100 m (328 ft)	100 m (328 ft)	100 m (328 ft)
Flat Trunk Length	420 m (1,378 ft)	200 m (656 ft)	75 m (246 ft)
Maximum Drop Length	6 m (20 ft)	6 m (20 ft)	6 m (20 ft)
Cumulative Drop Length	156 m (512 ft)	78 m (256 ft)	39 m (128 ft)

DeviceNet uses a trunk-line/drop-line topology that provides separate twisted pair busses for both signal and power distribution.

(*) - Source ODVAweb site

For additional product and technical information, visit www.woodhead.com/ecatalog.