2-channel incremental encoder interface, 5 V (2 x AB or 1 x ABC, RS422, TTL) EL5112
Status input/B2
Input A 
Input B 
Input C1/A2 
Status input/B2 
supply +UE 
supply -U0 
Input A
Input B
Input C1/A2
Input B2
supply +UE
supply -U0
Top view 
Contact assembly 
XFC – eXtreme Fast Control

EL5112 | 2-channel incremental encoder interface, 5 V (2 x AB or 1 x ABC, RS422, TTL)

The EL5112 EtherCAT Terminal is an interface for the direct connection of two incremental encoders with A and B track or one encoder with A, B and C track. Encoders with differential signals (RS422) or single-ended signals (TTL and Open collector) can be connected. Input frequencies up to 5 MHz can be processed. In 2-channel mode, one 24 V digital input per channel is available for storing, blocking and setting the counter status; in 1-channel operation, both inputs can be used. It is also possible to set the counter to a predefined value or to lock the counter directly through the process data. The 5 V, 12 V or 24 V supply of the encoder can be provided directly via the terminal connection points.


Special features:


In addition, the EL5112 enables the measurement of a period, frequency or velocity with a resolution of 10 ns. A duty cycle measurement of the input signal in 1-channel mode is implemented.


With the optional interpolating microincrement functionality, the EL5112 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, the edge at the latch input and the zero pulse track C is also available. The use of encoder profiles enables simple and fast linking of the process data for Motion Control applications.

Technical data 1-Kanal-Betrieb 2-Kanal-Betrieb
Technology incremental encoder interface, differential (RS422), single-ended (TTL, Open Collector), counter, pulse generator
Number of channels 1 2
Encoder connection 1 x A, B, C: differential inputs (RS422): A, A̅, B, B̅, C,C̅, single-ended connection (TTL, Open Collector): A, B, C 2 x A, B: differential inputs (RS422): A, A̅, B, B̅, single-ended connection (TTL, Open Collector): A, B, counter, pulse generator: A, B
Additional inputs latch, gate/latch (24 V DC, TON > 1 µs), status input (max. 5 V DC, negative-switching, TON > 10 µs) gate/latch (24 V DC, TON > 1 µs) per channel
Encoder operating voltage 5 V DC (default), 12 V DC, 24 V DC switchable, 0.3 A total current (generated from the 24 V DC power contacts)
Counter 32 bit (default), 16/32 bit switchable
Limit frequency RS422: 20 million increments/s with 4-fold evaluation, corresponding to 5 MHz,
TTL: 4 million increments/s with 4-fold evaluation, corresponding to 1 MHz,
Open Collector: 400 kilo increments/s with 4-fold evaluation, corresponding to 100 kHz
Quadrature decoder 4-fold evaluation (default), 2-fold-, 1-fold evaluation switchable
Resolution 1/256 bit microincrements
Current consumption power contacts typ. 10 mA + load
Current consumption E-bus typ. 190 mA
Wiring fail indication yes, for RS422 encoder
Distributed clocks yes
Special features Open circuit detection, frequency, period duration, speed and duty cycle measurement, microincrements, timestamp on last incremental edge, zero pulses C, latch input, gate/latch input Open circuit detection, period duration, frequency and speed measurement
Weight approx. 50 g
Electrical isolation 500 V (E-bus/field potential)
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
Protect. class/installation pos. IP 20/variable
EMC immunity/emission conforms to EN 61000-6-2/EN 61000-6-4
Approvals/markings CE
Related products
EL5102 2-channel incremental encoder interface, 5 V (RS422, TTL, Open Collector)
EL5122 2-channel incremental encoder interface, 5 V, single ended (TTL, Open Collector)
EL5131 2-channel incremental encoder interface, 5 V with two parameterizable 24 V DC outputs