EL6631-0010 Beckhoff
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The EL6631-0010 is a PROFINET RT Device terminal produced by Beckhoff as part of the EL EtherCAT Terminals series. It has 2 Ethernet ports with 10BASE-T/100BASE-TX interfaces and supports data rates up to 100 Mbit/s. The terminal offers 500 V isolation between the e-bus and Ethernet, with a typical e-bus current of 400 mA.
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Product Description:
The EL6631-0010 is a communication terminal manufactured by Beckhoff and positioned in the EL EtherCAT Terminals series. It operates as a PROFINET RT device inside an EtherCAT I/O station, allowing a controller on the PROFINET side to read and write process data that is delivered over the EtherCAT backplane. By acting as this real-time interface, the unit enables distributed drives, sensors, and actuators to be incorporated into mixed network architectures without separate gateways.
The terminal supports a data rate of 10/100 Mbit/s, which is selected automatically through the IEEE 802.3u auto-negotiation procedure. Two integrated Ethernet connectors, built as 10BASE-T/100BASE-TX, 2 × RJ45 sockets, create a simple line topology, and a third internal switch port forwards traffic to the EtherCAT e-bus. When Category 5e cabling is used, the physical segment may extend up to 100 m over twisted-pair cabling, which satisfies common cabinet-to-cabinet distances. The device can transfer new process data every 1 ms, so motion or pressure loops that demand sub-cycle updates can be synchronized with minimal jitter. Electrical separation between the e-bus and the external Ethernet wiring is specified at 500 V, reducing the risk of ground loops between decentralized control panels.
Power is supplied solely from the EtherCAT backplane, and the typical consumption is 400 mA, a value that must be added to the segment current budget when multiple terminals are stacked. The module maps cyclic input and output information into a maximum process image of 2 KB, while user-defined acyclic data blocks can reach 1500 bytes for configuration or diagnostics. Its environmental design corresponds to protection rating IP20, meaning it is intended for installation in an enclosed control cabinet. From a protocol standpoint, it supports RT Class 1, Conformance Class B, allowing it to communicate with controllers that use standard PROFINET RT functions.
