DeviceNet is an ODVA device-level communication protocol for industrial automation.
The DeviceNet network is an open, low-cost system link between industrial devices such as sensors and actuators and higher-level devices such as programmable logic controllers and PCs.
DeviceNet networks use the network-independent protocol called Common Industrial Protocol (CIP) to provide its control, configure and data collection capabilities.
Additional flexibility is offered via the network's ability to work with devices from multiple vendors.
Other DeviceNet system benefits include:
* Eliminates the expense associated with hardwiring and traditional "homerun" cabling practices
* Gives users the ability to use device-level diagnostics
* Allows users to configure many products in real time; they can even replace devices on a live network
* Offers a boost in overall system performance (because DeviceNet is able to provide both event-based and timer-based options).
Features of DeviceNet networks
A DeviceNet network can support up to 64 nodes and the network end-to-end distance is variable, based on network speed. At 125 Kbps, the maximum network distance is up to 500m.
At the highest speed, 500 Kbps, the maximum network distance is up to 100m. The bus topology is a trunkline-dropline linear bus.
A feature unique to DeviceNet is the ability to add a power tap at any point (with a maximum power pair ampacity of 8A), allowing for redundant power supplies.
Belden has long been a leader in the manufacture of DeviceNet cables and in conjuction with its active membership in ODVA, Belden spearheads the development of many innovative cabling solutions.
DeviceNet typically uses data and power conductors from the same cable, such as Belden’s Product No. 3082A. In Belden’s DeviceBus line, Product No. 3082KP is the exception to the data/power pair rule since it has four power conductors.
Available from Maser Communications , DeviceBus cables are typically designated as either Class 1 (600V) or Class 2 (300V) "Thick," "Thin," "Mid," or "Flat" cable and they can be used for either trunk or drop applications, dependent on the system speed and overall end-to-end distance.
Features and benefits of Belden DeviceBus cables include:
* Data and power functionality in one cable
* Reduced cable and installation costs
* Round versions are especially noise resistant
* Easier connectivity (flat versions)
* Fully compliant with ODVA specifications
* Fully compliant with the RoHS Directive.
Most DeviceBus cables have heavy-duty, sunlight- and oil-resistant PVC-jacketed constructions.
Two Class 2 cables - Product Nos. 3083Aand 3085A - are offered with yellow CPE jackets for extremely harsh industrial environments.
In the paired cables, the power pairs have PVC or PVC/nylon insulation; the data pairs have either FEP or F-R Polypropylene insulation.
Class 1 Product Nos. 7896A, 7897A and 7900A are designated for cable tray use and are able to occupy the same tray or conduit as 600V cables.