DeviceNet is a field-level network, 5136-DNP-PCI utilizes controllers to connect industrial input/output devices. Its interface module can be configured with a custom NI system that converts a PXI chassis into a DeviceNet master or slave, and then connects to a third-party DeviceNet network and communicates.
The DeviceNet interface module has an onboard microprocessor and optical isolation physical layer, and the 5136-DNP-PCI can communicate with the DeviceNet network system as a master station (scanner) or slave station device. These modules come with advanced apis that give full access to the DeviceNet network and provide easy access to device data while providing simplified explicit messaging..
The DeviceNet interface module follows the Open Systems Interconnection (OSI) model, which uses seven layers: physical layer, data link layer, network layer, transport layer, session layer, presentation layer, and application layer. The following describes the working principles of the physical layer and data link layer:
Physical layer: consists of cables, nodes, taps, and terminal resistors in the trunk-vertical topology. These components are jointly responsible for the transmission of data to ensure the stability and reliability of the signal.
Data Link Layer: DeviceNet devices use the Controller Local Area Network (CAN) standard to handle all messaging between the controller and the device. 5136-DNP-PCI is responsible for packaging and unpacking the data, ensuring that the data is transmitted correctly in the physical layer.
In addition, the network and transport layer establishes connections to devices by using the node's connection ID, including the device's MAC ID and message ID, ensuring that each device has a unique address for easy identification and management
