1-channel incremental encoder interface EL5151
Signal LED
Signal LED B
Signal LED C 
Signal LED A 
Power contact
+24 V
Power contact 0 V
+24 V
0 V
Top view 
Contact assembly 
extended temperature range
extended shock and vibration range 25g

EL5151 | 1-channel incremental encoder interface

The EL5151 EtherCAT Terminal is an interface with 24 V inputs for the direct connection of incremental encoders. With the EL5151, a 32 bit counter with a quadrature decoder and a 32 bit latch for the zero pulse can be read, set or enabled. Alternatively, the EL5151 can be used as up/down counter terminal with gate.

The EL5151 supports the synchronous reading of the encoder value, together with other input data, into the EtherCAT system via high-precision EtherCAT distributed clocks (DC).

Technical data EL5151 | ES5151
Technology incremental encoder interface 24 V DC
Number of channels 1
Encoder connection A, B, C, gate/latch input 24 V DC, EN 61131-2, type 1, “0“: < 5 V DC, “1“: > 15 V DC, typ. 5 mA
Sensor inputs 1
Encoder operating voltage 24 V DC
Counter 1 x 16/32 bit switchable
Input frequency max. 400,000 increments/s (with 4-fold evaluation)
Quadrature decoder 4-fold evaluation
Commands read, set, latching
Distributed clocks yes
Input signal 24 V DC
Supply voltage 24 V DC (-15 %/+20 %)
Nominal voltage 24 V DC at power contact
Current consumption power contacts typ. 100 mA + load
Resolution 1/256 bit microincrements
Current consumption E-bus typ. 130 mA
Bit width in the process image 14 byte ENC input, 6 byte ENC output
Special features gate or latch function, microincrements, timestamping of edges, period duration and frequency measurement, up/down counters
Weight approx. 50 g
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. class/installation pos. IP 20/variable
Pluggable wiring for all ESxxxx terminals
Approvals CE, UL, Ex
Related products  
EL5151-0021 1-channel incremental encoder interface with parameterisable 24 V DC output
EL5152 2-channel incremental encoder interface, 32 bit