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Beckhoff · EtherCAT Terminal
EL2904 is a Beckhoff industrial component with Supply voltage 24 V DC (IEC 61131-2); Enclosure rating IP20 (IEC 60529); Operating temperature 0...+55 °C (IEC 60068-2-1). It is used in control panels, machine builds, spare-part replacements where the installed unit is matched to the original catalog number and a compact, documented part is required.
| Electrical | |
| Tripping characteristic | 8…9 mm |
|---|---|
| Supply voltage | 24 V DC (IEC 61131-2) |
| Output current | 0.5 A (per channel), min. 20 mA (with active current measurement) |
| I/O and communication | |
| Bus interface | TwinSAFE/Safety over EtherCAT |
| Communication ports | EtherCAT, Ethernet |
| Response time | ≤ watchdog time (parameterizable) |
| Mechanical | |
| Dimensions (H x W x D) | 24 mm x 100 mm x 68 mm |
| Weight | approx. 100 g |
| Mounting | 35 mm DIN rail (IEC 60715) |
| Enclosure rating | IP20 (IEC 60529) |
| Environment and compliance | |
| Operating temperature | 0...+55 °C (IEC 60068-2-1) |
| Certifications | CE, UL, cULus |
Values follow the Beckhoff EtherCAT Terminal specification for this catalog number; parameters not confirmed for this variant are omitted rather than estimated.
| Beckhoff EtherCAT Terminal variants | |||
| Catalog number | Rated operational voltage | Mounting | |
|---|---|---|---|
| EL2904 (this page) | — | 35 mm DIN rail (IEC 60715) | |
| EL2912 | — | 35 mm DIN rail (IEC 60715) | |
| EL2004 | 24 V DC (-15%/+20%) | 35 mm DIN rail (IEC 60715) | |
| EL2008 | 24 V DC (-15%/+20%) | 35 mm DIN rail (IEC 60715) | |
Before selecting an alternative, confirm its dimensions, terminals and installation requirements in the manufacturer documentation.
The EL2904 is the device-level element in a Beckhoff industrial component installation. It receives the field signals and control supply listed above — 24 V DC (IEC 61131-2) — and switches or conditions the load within the the rated ratings shown in the Specifications table. Wiring and protective devices are sized to those same numbers, not to a generic assumption.
Typical installations place it in control panels, machine builds, spare-part replacements, where the unit is matched to the original catalog number and the enclosure provides 35 mm DIN rail (IEC 60715) support. Record the catalog number and revision from the nameplate of the installed unit before specifying a like-for-like spare.
Beckhoff EL2904 — Industrial automation component supplied as a like-for-like replacement, selected by catalog number and published ratings. The figures below are taken from the specification table on this page for catalog number EL2904; confirm the installed unit's part number and revision so the replacement matches both electrically and mechanically.
Datasheets and compliance documents are available on request; quote the full catalog number when enquiring.
Q.For EL2904, what does the specification table state about enclosure rating?
The specification table lists enclosure rating = IP20 (IEC 60529) for Beckhoff EL2904. Compare it with the nameplate of the installed unit before ordering.
Q.Which value is published under operating temperature for catalog number EL2904?
For EL2904, operating temperature is given as 0...+55 °C (IEC 60068-2-1). Confirm this figure against the unit currently in the panel.
Q.Before ordering EL2904, which mounting entry should be checked?
The mounting entry quoted above is 35 mm DIN rail (IEC 60715). Use the value as the reference when sourcing a current-production equivalent.
Q.How do I confirm compatibility of EL2904 before ordering?
Match the catalog number EL2904 and the specification values listed above against the installed unit, then confirm the firmware or hardware revision where a revision-sensitive part is involved.
Q.Can the EL2904 replace the unit currently installed in my panel?
Compare catalog number EL2904 and the ratings above with the nameplate of the installed device. A current-production equivalent is selected by function and electrical rating, not by the label alone.
Standard (US & Canada, tracked courier): delivered in 5–8 business days. In-stock items are processed within 2–4 business days. USD 25 flat rate on orders under $500.00; free on orders of $500.00 and above.
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Non-Stock / On-Order items ship on request: dispatch time is confirmed before your order — see our Shipping Policy. Shipping charges and available services are displayed at checkout. See the Shipping Policy for details.
Every product is covered by a 12-month seller warranty provided by SHLY-PLC, effective from the date of delivery, against defects in materials and workmanship under normal use.
This warranty does not cover damage from misuse, improper installation, power surges, neglect, unauthorized repair, or normal wear and tear. See our Return Policy for warranty-claim instructions.
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