1-channel incremental encoder interface with parameterisable 24 V DC output EL5151-0021
Signal LED
Signal LED B
Signal LED C 
Output LED 
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

EL5151-0021 | 1-channel incremental encoder interface with parameterisable 24 V DC output

The EL5151-0021 EtherCAT Terminal is an interface with 24 V inputs for the direct connection of incremental encoders. A 32-bit counter with quadrature decoder can be connected to the interface. A 32-bit latch input for the zero pulse can be read, set or activated. In addition, a parameterisable 24 V DC output is available, which is set when a specified count value is set (compare function). The integrated workpiece measurement function enables logging of the start and end values of the counter. The measurement is triggered by the external latch input. Both values are output separately as 32-bit values.

Technical data EL5151-0021
Technology incremental encoder interface 24 V DC, EN 61131-2, type 1, “0”: < 5 V DC, ”1”: > 15 V DC, typ. 5 mA
Number of channels 1
Encoder connection A, B, C, latch input 24 V DC, 24 V/0 V
Sensor inputs 1
Encoder operating voltage 24 V DC
Counter 1 x 32 bit
Input frequency max. 400,000 increments/s (with 4-fold evaluation)
Quadrature decoder 4-fold evaluation
Commands read, set, latching, compare function, workpiece measurement
Distributed clocks
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
Bit width in the process image 18 byte ENC input, 14 byte ENC output
Special features latch function, parameterisable output 24 V DC (compare function), workpiece measurement
Weight approx. 50 g
Operating/storage temperature 0…+55 °C/-25…+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
Approvals/markings CE, UL
Related products  
EL5151 1-channel incremental encoder interface, 32 bit
EL5152 2-channel incremental encoder interface, 32 bit