EL5002 Beckhoff
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MPN: EL5002-0000
The Beckhoff EL5002 is an EtherCAT Terminal with two channels and supports distributed clocks. As part of the EL EtherCAT Terminals series, it features an SSI absolute encoder interface with an RS422 signal standard and operates at a maximum clock frequency of 1 MHz. The supply voltage required for this terminal is 24 VDC.
Internal Product Review
The EL5002 is a Beckhoff EtherCAT terminal designed for absolute encoders through an SSI interface. Distributed clocks support precise synchronization, and the RS422 signal standard promotes stable encoder communication. A 1 MHz max clock frequency makes this terminal a strong choice for accurate high-speed feedback integration.
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Product Description:
The EL5002 is an encoder interface terminal produced by Beckhoff within the EL EtherCAT Terminals series. Installed on a DIN rail, the unit links rotary or linear encoders to an EtherCAT network so that a controller can receive precise position information without additional wiring complexity. In factory automation, the terminal occupies a small footprint and enables high-resolution feedback for motion axes, inspection systems, and process synchronization.
It provides 2 channels, enabling simultaneous acquisition of data from two independent encoders through a single terminal slice. Each channel follows the SSI protocol, which transmits position words in a serial, clock-synchronous format suited for deterministic sampling. The terminal supports absolute encoders, allowing the controller to receive a complete position value during every read cycle instead of incremental steps and eliminating the need for homing routines after power loss. Electrical signaling conforms to the RS-422 differential standard, allowing cable runs with high noise immunity in industrial environments. Communication with the controller occurs over EtherCAT, so cycle times remain short even when many terminals share the same bus.
This terminal is fed from a system power rail of 24 V DC, which supplies the internal logic and encoder clock drivers. The shift clock delivered to the SSI lines can be adjusted up to 1 MHz, supporting encoders that require fast readout for high-speed motion control. Built-in support for distributed clocks allows the EtherCAT master to align the EL5002 sampling point with nanosecond precision across the entire I/O segment, improving synchronization among connected motion axes. The terminal integrates with TwinCAT configuration tools without requiring additional plug-ins, which simplifies its inclusion in an EtherCAT I/O arrangement. Its compact terminal format also allows both encoder channels to be installed within the same control cabinet row while preserving space for neighboring input and output modules.
