BECKHOFF EL5101 EtherCAT Terminal 1-channel encoder interface incremental 5 V DC

Short Description:


Product name:   EtherCAT Terminal

Model:  EL5101

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The EL5101 EtherCAT Terminal is an interface for the direct connection of incremental encoders with differential signals (RS422) or TTL single ended signals. Input frequencies up to 1 MHz can be evaluated. Two additional 24 V digital inputs are available for storing, blocking and setting the counter status. The error message output of an encoder can be connected and evaluated via the status input. The 5 V and 24 V supply of the encoder can be provided directly via the terminal connection points.

Special features:

  • save, lock, set counter
  • integrated frequency and period measurement
  • optionally usable as 5 V up/down counter
  • microincrements
  • synchronous reading of the position value via distributed clocks
  • timestamp on the last-registered incremental edge

In addition, the EL5101 enables the measurement of a period or frequency with a resolution of 100 ns. With the optional interpolating microincrement functionality, the EL5101 can provide even more accurate axis positions for dynamic axes. It also supports synchronous reading of the encoder value together with other input data in the EtherCAT system via the high-precision EtherCAT distributed clocks (DC). A timestamp for the last-registered incremental edge is also available. The use of encoder profiles enables simple and fast linking of the process data for motion control applications.


Technical data EL5101
Technology incremental encoder interface, differential (RS422), single-ended (TTL), counter, pulse generator
Number of channels 1
Encoder connection 1 x A, B, C: differential inputs (RS422): A, A̅ (inv), B, B̅ (inv), C,C̅ (inv), single-ended connection (TTL): A, B, C, counter, pulse generator: A, B
Additional inputs status input 5 V DC, gate/latch input 24 V DC
Encoder operating voltage 5 V DC/max. 0.5 A (generated from the 24 V DC power contacts)
Counter 1 x 16/32 bit switchable
Limit frequency 4 million increments/s (with 4-fold evaluation), corresponding to 1 MHz
Quadrature decoder 4-fold evaluation
Distributed clocks yes
Nominal voltage 24 V DC (-15%/+20%)
Resolution 1/256 bit microincrements
Current consumption power contacts typ. 100 mA + load
Current consumption E-bus typ. 130 mA
Special features wire breakage detection, latch and gate function, period duration and frequency measurement, microincrements, timestamping of edges, filters
Weight approx. 100 g
Electrical isolation 500 V (E-bus/field potential)
Operating/storage temperature -25…+60°C/-40…+85°C
Relative humidity 95%, no condensation
Vibration/shock resistance conforms to EN 60068-2-6/EN 60068-2-27
EMC immunity/emission conforms to EN 61000-6-2/EN 61000-6-4
Protect. rating/installation pos. IP20/variable
Pluggable wiring for all ESxxxx terminals
Approvals/markings CE, UL, ATEX, IECEx
Ex marking ATEX:
II 3 G Ex ec IIC T4 Gc
Ex ec IIC T4 Gc

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