Part Number: | EK1122 |
---|---|
Manufacturer: | Beckhoff |
Series: | EK EtherCAT Couplers |
Current response time:
6 Minutes
20 Seconds
- MPN: EK1122-0000
- Straightforward Pricing: No Rush Fees, No Credit Card Fees



The EK1122 is a 2-port EtherCAT junction designed for the coupling of EtherCAT junctions, supporting a maximum station distance of 100 meters. As part of Beckhoff's EK EtherCAT Coupler Series, it features a data transfer rate of 100 Mbit/s. Additionally, it operates with a current consumption of approximately 220 mA and allows hot-connect capabilities.
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- Description
- Specs
- FAQ
- Common Troubleshooting Steps
- Product Comparison
- Similar Ordering Codes
- Common Error Codes
Symptom / Error Condition | Probable Cause(s) | Recommended Corrective Action |
EK1122 not detected in TwinCAT scan | – EtherCAT cable unplugged or damaged– Wrong device order / missing terminator– Unit in INIT state after reboot | 1. Verify both RJ-45 cables are firmly seated and undamaged.2. Check that the EK1122 sits at the expected node address in the topology.3. Press F5 in TwinCAT → Scan Devices and acknowledge the topology change. |
RUN LED off, LINK LED(s) off | No 24 V DC supply or reversed polarity | Measure supply voltage at 24 V and 0 V terminals; correct wiring and re-energize. |
RUN LED flashes green-red | Boot-loader or firmware fault | Power-cycle once. If persistent, update firmware via TwinCAT → Advanced Settings ▸ Firmware Download. |
Port 1 LINK on, Port 2 LINK off | Downstream cable or device failure on Port 2 | Swap cables between ports; if LINK follows cable, replace cable. Otherwise inspect the first device after Port 2. |
Device stuck in PRE-OP or SAFE-OP | – Incorrect Process-Data-Object (PDO) assignment– Sync manager mismatch after topology change | In TwinCAT System Manager, re-map PDOs (right-click Coupler → Reload Device Description), then Activate Configuration and Restart in OP. |
“AL status code 0x0014: Invalid setting” | EEPROM parameters changed unintentionally (e.g., distributed clocks disabled) | Open Online tab → Coe Online, restore default values (object 0x1C32/0x1C33) or load a working EtherCAT XML. |
Frequent EtherCAT “lost frames” warnings | – Excessive cable length or EMI– Mixed copper/fiber segments without proper media converters | Keep total copper segment ≤ 100 m; route away from VFD/motor power; use shielded Cat-5e/6 and proper grounding. |
Port LEDs flicker randomly, communication drops | Power supply ripple/noise or undervoltage when other 24 V loads switch | Add a DIN-rail buffer module or larger 24 V PSU; separate logic supply from inductive loads. |
Unit overheats, housing > 55 °C | Ambient temp > 50 °C or inadequate ventilation in panel | Provide 50 mm free air above/below; add fan or move EK1122 away from heat-dissipating drives/PSUs. |
Device identification mismatch after replacement | Replacement unit has newer firmware or different revision ID | Right-click device in TwinCAT → Change Revision ID to match actual HW, then download revised configuration. |
Model | Network Function | Ports (connector) | Distinct Features |
EK1122 | 2-port EtherCAT junction (branch coupler) | 2 × RJ-45 (≤ 100 m each) | Supports Hot Connect; lets you form star topologies inside an EL terminal chain |
EK1100 | Standard EtherCAT bus coupler | 2 × RJ-45 | Converts 100BASE-TX to Beckhoff E-bus; up to 65 535 terminals per station |
EK1101 | Coupler with ID switch | 2 × RJ-45 | Three hex ID switches enable flexible station addressing / fast Hot Connect |
EK1110 | EtherCAT line-extension terminal | 1 × RJ-45 | Adds an extra 100 m without config; powered from E-bus |
EK1300 | EtherCAT P coupler (data + power) | 2 × M8 P-coded | Combines communication and 24 V DC (US/UP) in one 4-wire cable |
EK1310 | 1-port EtherCAT P extension with feed-in | 1 × M8 P-coded | Converts EtherCAT → EtherCAT P; injects/boosts power for downstream devices |
Hex Code | TwinCAT / EtherCAT Diagnostic Text |
0x0002 | No memory |
0x0011 | Invalid requested state change |
0x0014 | No valid firmware / invalid setting |
0x0017 | Invalid Sync-Manager configuration |
0x001B | Sync-Manager watchdog |
0x001E | Invalid Sync-Manager IN (input) configuration |
0x001F | Invalid watchdog configuration |
0x0026 | Inconsistent settings |
0x0029 | Free-Run needs 3-buffer mode |
0x0030 | Invalid DC Sync configuration |