Beckhoff EJ1889 EtherCAT Plug-in Module
The EJ1889 acquires binary 24 V DC control signals from the process level. It transmits them in electrically isolated form to the higher-level automation unit. This EtherCAT plug-in module packs 16 channels into a compact 12 mm housing. LEDs show each channel state. The 3 ms input filter eliminates bouncing from mechanical switches. Ground switching topology suits specific sensor and wiring schemes.
Technical Data
- Model: EJ1889
- Brand: Beckhoff
- Type: EtherCAT I/O plug-in module
- Inputs: 16
- Nominal voltage: 24 V DC (-15 %/+20 %)
- Signal “0”: 18…30 V DC, typ. 3 mA
- Signal “1”: 0…7 V DC, typ. 3 mA
- Input filter: typ. 3.0 ms
- Special feature: ground switching
- Electrical isolation: 500 V (E-bus/field potential)
- Current consumption E-bus: typ. 80 mA
- Dimensions (WxHxD): 12 mm x 66 mm x 55 mm
- Weight: approx. 30 g
- Operating temp: -25…+60 °C
- Storage temp: -40…+85 °C
- Humidity: 95 %, no condensation
- EMC: EN 61000-6-2 / EN 61000-6-4
- Vibration/shock: EN 60068-2-6 / EN 60068-2-27
- Protection: IP20
- Approvals: CE, UL
- Housing: polycarbonate, EJ-12-16pin
- Connection: 2 x 20-pin socket strip
- Installation: signal distribution board
Oiltech Controls’s Insight
- Ground switching saves wiring time in negative-logic sensor banks.
- 16 channels in 12 mm width reduces panel space.
- 3 ms filter stops false counts from relay bounce.
- 500 V isolation protects the E-bus from field faults.
- No distributed clocks needed for basic digital input tasks.
Compatible Devices and Systems
- Beckhoff EtherCAT Couplers (EK series)
- Beckhoff Embedded PCs (CX series)
- Signal distribution boards with EJ coding pins
- Negative-logic proximity sensors and switches
- Industrial panels with 24 V DC control circuits
- Legacy Beckhoff EJ systems needing drop-in replacement
Why Buy From Oiltech Controls?
- More than 15 years sourcing industrial automation spares.
- We ship worldwide with FedEx, UPS, and DHL.
- Tested surplus and refurbished units available.
- Every order includes a 12-month warranty.
- We verify function before shipment.
- We support obsolete control systems and hard-to-find parts.
- Orders ship in 24–28 hours.
Contact: info@oiltechcontrols.com or +86 158 8020 0923 (WhatsApp).
FAQ
Q: Can I use the EJ1889 with standard Beckhoff EK1100 couplers?
A: Yes. The EJ1889 works with EK series couplers. It uses the E-bus for communication. Check your signal distribution board for EJ coding pins. This ensures mechanical fit and signal integrity.
Q: What does ground switching mean for my wiring?
A: Ground switching means the input activates when connected to 0 V. The “0” state sits at 18–30 V. The “1” state sits at 0–7 V. This suits NPN sensors and negative-logic circuits. Plan your field wiring accordingly.
Q: How does the 3 ms filter affect high-speed counting?
A: The 3 ms filter blocks contact bounce. It limits input frequency to roughly 166 Hz. For faster signals, choose a module with a shorter filter. The EJ1889 targets standard machine control, not high-speed counting.
Q: Is the EJ1889 a direct replacement for older EJ1889 units?
A: Yes. The EJ1889 remains in regular delivery. It keeps the same 12 mm housing, 20-pin socket, and coding pins. You can swap it without changing the distribution board.
Q: What should I check before buying a surplus EJ1889?
A: Ask for test results and photos of the socket strip. Confirm the latching lug is intact. Verify the housing has no cracks. Oiltech Controls tests each unit before shipment. We also provide a 12-month warranty.
Long-Tail Keywords
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