Product Description:

The ELX3152 is an I/O terminal produced by Beckhoff within the EL EtherCAT Terminals series. Designed for distributed control cabinets, the unit occupies one slot on a standard EtherCAT rail and converts incoming field signals into the serial EtherCAT data stream. By integrating this terminal, system builders can route process-side sensor information from hazardous zones back to the controller without adding separate safety barriers, simplifying intrinsically safe automation architectures.

It operates from a control voltage of 24 V DC supplied through the backplane, and the internal power conversion conforms to the SELV/PELV classification so touchable circuits remain below permissible energy levels. On the field side, the interface is protected according to Ex i, meaning the energy delivered to connected loops is limited to prevent ignition in explosive atmospheres. The housing carries an IP54 cabinet protection rating; therefore, water splashes and limited dust ingress will not compromise operation when the terminal is installed in a suitable ventilated enclosure. The permitted installation area is Zone 2 or a nonhazardous location, allowing placement just outside the primary danger zone while still serving instrumentation inside it. The power feed and sensor channels share a common return through the EtherCAT power distribution, removing the need for separate field supplies.

Only intrinsically safe devices may be connected to the front terminals, and the design does not permit an external sensor supply. Each input is powered through its respective channel, ensuring that a fault on one loop cannot propagate to neighboring loops. The connector block follows the Ex e increased-safety concept, which requires reinforced clearances and captive screws. During abnormal conditions, the terminal limits the open-circuit or fault voltage to 60 V, thereby maintaining the ignition protection margin required for field circuits.