EL2911 Beckhoff TwinSAFE Terminal
The EL2911 is a TwinSAFE potential supply terminal from Beckhoff. It feeds a safe 24 V DC group up to 10 A. If a fault occurs, it drops to the safe state. In this way, standard terminals inside one segment can be shut down safely. The terminal also carries four safe inputs and one safe output. Safety data moves over FSoE to a TwinSAFE Logic-capable device. Because the parameters live in the logic device, a failed unit is easy to swap. On restart, the safety application pushes the data to the new terminal. Notably, the EL2911 also embeds EL6910 TwinSAFE Logic. As a result, it works as a compact safety controller with up to 128 safe connections.
Technical Data
- Connection: 1-/2-wire or power contacts
- Function: link unit between safe input and output
- Outputs: 1 safe output
- Max output current: 10 A
- Protocol: TwinSAFE / Safety over EtherCAT
- Fault response: ≤ watchdog time, parameterizable
- E-bus current: typ. 180 mA
- Installation: horizontal
- Safety standard: EN ISO 13849-1 Cat. 4 PL e, EN 61508 SIL 3
- Weight: approx. 98 g
- IP rating: IP20
Housing and Wiring
- Housing: EL-24-2x8pin, compact, signal LEDs
- Material: polycarbonate
- Size: 24 x 100 x 68 mm
- Mounting: 35 mm DIN rail, EN 60715
- Side mounting: double slot and key
- Marking: BZxxx series
- Wiring: spring actuation by screwdriver
- Cross-section: 0.08 to 2.5 mm²
- AWG: 28 to 14
- Stripping length: 8 to 9 mm
- Power contact load: 10 A max
Key Features
- 4 safe inputs
- 1 safe output at 10 A
- Integrated TwinSAFE Logic, similar to EL6910
- Up to 128 safe connections
- Full safety loop on one terminal
- Safe potential groups for standard components
- Fine test pulse setup per input
- Standard outputs with integrated ANDing
Compatible Equipment
- Beckhoff EtherCAT terminal segments
- TwinSAFE Logic-capable controllers
- FSoE safety networks
- Standard terminals needing safe shutdown
- Machines built to SIL 3 or PL e
Oiltech Controls Review
- Tested before dispatch for safe output and input response
- Checked for FSoE communication stability
- Suitable for retrofits and obsolete safety lines
- Stock options include surplus and refurbished units
- Each order ships with a 12-month warranty
Oiltech Controls’s Insight
- Replace the terminal without reloading safety parameters
- Use EL6910 logic only if you need more than 128 links
- Confirm the watchdog time before setting fault response
- Keep standard loads inside the safe potential group
- Check test pulses when inputs show short faults
Installation Notes
- Mount on a 35 mm DIN rail
- Keep the unit horizontal
- Use 8 to 9 mm stripping length
- Do not exceed 10 A on power contacts
- Wire safe inputs with shielded cable where needed
Ordering and Shipping
- Dispatch within 24 to 28 hours
- Shipping by FedEx, UPS, and DHL
- Technical check before shipment
- 12-month warranty on eligible units
Why Buy From Oiltech Controls?
- More than 15 years in industrial automation spare parts
- Worldwide shipping support
- Tested industrial surplus and refurbished options
- 12-month warranty on covered products
- Technical verification before every shipment
- Help for obsolete control systems
FAQ
Q: Can I replace the EL2911 without a laptop?
A: Yes, in most cases. The safety parameters sit in the logic device. When the application restarts, it sends the data to the new terminal. Still, confirm the project backup before you swap the unit.
Q: Does the EL2911 need a separate safety controller?
A: No. It has TwinSAFE Logic inside. It can run a full safety loop on its own. However, it limits safe connections to 128. If your project needs more, use a larger logic controller.
Q: How do I choose between the EL2911 and the EL6910?
A: Pick the EL2911 when you need a safe 10 A supply group plus local logic. Pick the EL6910 when you need more safe connections. Also check the input count and the output current you require.
Q: What causes a safe output trip?
A: Common causes include overload above 10 A, wiring faults, and watchdog timeouts. In addition, a missing FSoE link can force the safe state. Check the LEDs and the fault response setting first.
Q: What should I check before buying a used EL2911?
A: Ask for the firmware version, the test report, and the housing condition. Also confirm the terminal fits your EtherCAT segment. Finally, check that the seller offers a 12-month warranty and pre-shipment testing.
Contact Information
Inquiries: info@oiltechcontrols.com
Phone / WhatsApp: +86 158 8020 0923
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