EL2595

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The EL2595 EtherCAT terminal offers 2-wire connection technology, an input voltage of 24 V DC (-15%/+20%), an output current range of 300 to 700 mA, and supports distributed clocks with precision under 1 µs. Part of the EL EtherCAT Terminals by Beckhoff, it features a load type optimized for LEDs.

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Product Description:

The EL2595 EtherCAT Terminal from Beckhoff is a 1-channel LED output terminal that enables the precise regulation of the current flowing to LEDs that are connected in series. The output terminal is engineered to cater to the requirements of industrial automation and is equipped with sophisticated synchronizing capabilities.

The EL2595 EtherCAT Terminal has a constant current source, which enables the simultaneous operation of multiple LEDs. The EtherCAT terminal is capable of functioning with an input voltage of 24 V DC. It can immediately adjust the output voltage from 2 V to 48 V DC to maintain the specified current between 300 mA and 700 mA. The EtherCAT terminal is capable of synchronizing lighting tasks with a high degree of precision, as it can manage distributed clocks with an accuracy of less than 1 µs. Occasionally, the device can generate pulses that begin at 200 µs, and the time it takes to turn on and off is less than 1 µs. If contact is lost, autonomous operation can be activated as an alternative that allows the LED to operate continuously.

The EL2595 EtherCAT Terminal comes in a high-density plastic case that is 12 mm x 100 mm x 68 mm and is made to be mounted on a DIN rail. With either a straight plug-in or a spring-actuated mechanism, the connection technology works with both solid and stranded wires. The machine works in temperatures ranging from 0°C to 55°C and meets the necessary EMC and vibration standards. The LED output terminal has a trigger input that is electrically separated so that it can be controlled from the outside and can diagnose both input and output parameters in real time.

Connection technology
2-wire
Distributed clock precision
<1 µs
Distributed clocks
Yes
E-bus current consumption
Typ. 130 mA
Input voltage
24 V DC (-15%/+20%)
Load type
LED (ohmic)
Number of outputs
1
Operating temperature
0 to 55°C
Output current
300 to 700 mA
Output voltage control
Up/down from input, dead band present
Output voltage range
2 to 48 V DC
Power contacts current consumption
Typ. 20 mA + load
Storage temperature
30 to 70°C
Switching times
TON, TOFF <1 µs (typ.); min pulse 200 µs
Trigger input current
Typ. 8 mA
Trigger input voltage
5 to 24 V DC
Trigger inputs
1 (electrically isolated)
Weight
Approx. 55 g
Symptom observed Probable cause(s) Quick fix / checkpoint
LED output stays OFF even though Control.Output = TRUE • Supply voltage below 12 V• Output-current parameter 0 mA Verify 24 V supply (≥ 12 V minimum) and set 0x8000:02 to the required forward current.
Output aborts during flash; terminal shuts itself OFF Over-/undercurrent or forward-voltage outside the ± load corridor ⇒ protective shutdown Check LED current draw, adjust limits in 0x8000:11-14, add cooling if needed.
Terminal drops to SAFE-OP while running EtherCAT master cannot meet real-time timing (watchdog or jitter) Run master on non-mobile CPU, fine-tune cycle time, reduce bus load.
EL2595 enters Emergency-Flash mode unexpectedly EtherCAT communication lost → SM-watchdog timeout Inspect wiring/switches, restore link, or disable 0x8002:04 if emergency flash not desired.
ReadyToActivate flag remains FALSE after a pulse Pulse-time limiter (0x8000:09/0A) enforcing mandatory OFF-time Wait for OFF-time to expire or lengthen limits to match duty cycle.
TwinCAT logger shows repeated SCI error messages Parameter/firmware mismatch after update Finish firmware update, then execute “Restore Default Parameter” (write 0x64616F6C to 0x1011:01).
Measured output current drifts > tolerance (warning/error) Wrong forward-voltage value or supply droop Enter correct LED Vf in 0x8000:04; verify PSU stability & wiring gauges.
LED flickers / brightness unstable Supply ripple or cycle-time jitter in current set-point PDO Use distributed-clock timestamped pulses, stabilise 24 V source.
Terminal won’t reach OP state / not found in Scan Missing or outdated ESI, or firmware too old Install latest ESI XML, update firmware via TwinCAT, then rescan.
Undervoltage/Missing-Voltage error bits set Supply fell below 17 V (warning) or 14 V (error) Restore 24 V supply; check for cable drops and brown-outs.
Model Primary role in EtherCAT system Network ports Notable technical features Typical max segment length*
EL2595 1-ch. LED constant-current output terminal – (plugs into E-bus) 2 – 48 V DC step-up/step-down PSU, up to 4 A constant current, µs-level strobe via Distributed Clocks N/A (inherits bus length from upstream coupler)
EK1100 Standard EtherCAT coupler (line extension) 2 × RJ45 Feeds up to 65 535 EL/ES terminals, supplies 5 V/2 A on E-bus, Hot Connect capable 100 m per copper run
EK1110 Extension end terminal (adds one copper spur) 1 × RJ45 Compact 44 × 100 × 68 mm, power via E-bus, 100 Mbit/s pass-through 100 m
EK1121-0010 1-port junction (star/extended-distance) 1 × RJ45 Up to 300 m copper link, Hot-Connect, 1 µs delay, IP20 300 m
EK1122 2-port junction (basic star hub) 2 × RJ45 Hot-Connect; multiple units create modular stars; 100 Mbit/s; 75 g 100 m per port
EK1132 2-port Power-over-EtherCAT (PoE) junction 2 × RJ45 Generates 48 V PSE per IEEE 802.3af, 350 mA per PD, combines signal + power over one cable 100 m
Hex code Severity / domain Plain-text message shown in TwinCAT
0x8411 Error – Drive Over-current limit exceeded
0x8412 Error – Drive Open-load / current too low
0x8421 Error – Drive Forward voltage above limit
0x8422 Error – Drive Forward voltage below limit
0x8424 Error – Drive Bus supply undervoltage (< 14 V)
0x8425 Error – Drive Bus supply overvoltage (> 52 V)
0x8430 Error – Drive Device over-temperature
0x8431 Warning – Drive Temperature pre-warning
0x8404 Error – Drive Internal watchdog timeout
0x8801 Error – I/O Parameter CRC / calibration invalid

Frequently Asked Questions about EL2595:

Q: Does EL2595 EtherCAT Terminal support distributed clocks?

A: Yes, EL2595 supports distributed clocks with precision much less than 1 µs. This enables high-precision synchronization for lighting control tasks.

Q: Why does the EL2595 EtherCAT Terminal have electrical isolation?

A: The 500 V electrical isolation between E-bus and field potential increases safety and protects both the terminal and connected devices from electrical faults.

Q: How does EL2595 EtherCAT Terminal manage output voltage?

A: The EL2595 automatically adjusts output voltage between 2 V and 48 V DC to maintain the set current, based on the connected LEDs.

Q: Do EL2595 EtherCAT Terminal switching times benefit LED control?

A: Yes, typical switching times of less than 1 µs allow for extremely short light pulses and precise control of LED operation.

Q: Why does the EL2595 EtherCAT Terminal have real-time diagnostics?

A: Real-time diagnostics allow monitoring of input and output parameters. This helps detect issues early and ensures consistent LED performance.


Internal Product Review

  • ‘‘The EL2595 EtherCAT Terminal offers precise LED current control with a 300–700 mA range and rapid switching times. It supports distributed clocks for high-precision synchronization and real-time diagnostics for monitoring. The EL2595 features electrical isolation and automatic operation during communication loss, making it a robust choice for demanding LED control applications.’’

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