The Terminal enables within an EtherCAT Terminal network the integration of any DeviceNet devices and can either be master (EL6752) or slave (EL6752-0010). The DeviceNet terminal has a powerful protocol implementation with many features:

• All DeviceNet I/O modes are supported: polling, change of state, cyclic, strobed.
• unconnected Message Manager (UCMM)
• offline connection set, Device Heartbeat Messages, Device Shutdown Messages
• Auto Device Replacement (ADR)
• powerful parameter and diagnostics interfaces
• The error management for each bus user is freely configurable.

Like the FC5201 DeviceNet PCI card, the EL6752 can be used for connection to DeviceNet networks. The terminal, however, enables a more space-saving implementation since no PCI slots are required in the Industrial PC.

https://www.beckhoff.com/vi-vn/products/i-o/ethercat-terminals/el6xxx-communication/el6752.html