DeviceNet was developed by Allen Bradley as an automation network based on the CAN bus. It is based on a producer/consumer protocol. From the user's point of view, data is handled completely separately from CAN bus transfer possibilities (e.g. longer data packets are automatically fragmented by DeviceNet). Access takes place using I/O messages with defi ned properties.

Fieldbus: DeviceNet

• 8 digital channels, can be configured as input or output
• Simple I/O configuration via the fieldbus
• Integrated connection to local expansion via X2X Link for 39 additional modules (including up to 16 analog modules)
• 1 ms cycle time for local expansion

The BC5321 bus controller meets the latest DeviceNet specifications: Rev. 2.0 Errata 5, Group2 only server. Just like CANopen, the DeviceNet device is also equipped with automatic transfer rate detection and auto-mapping for the I/O modules connected via X2X Link.

Explicit messaging, change of state, cyclic, polled and bit strobe mode are all supported as DeviceNet operating modes. In addition to the standard communication objects, there are also a number of manufacturer-specific objects.

Additional X67 modules or other modules that are based on X2X Link can be attached with the integrated X2X Link connection. The entire configuration of this type of modular system is supported by the DeviceNet standard. Allen Bradley developed this modular I/O confi guration to simplify the necessary configuration steps and to achieve the required confi guration of a modular DeviceNet device intuitively on a fl at and very user-friendly interface. The X67 DeviceNet bus controller from B&R also supports this type of configuration.