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 tracks or one encoder with A, B and C tracks. Encoders with differential signals (RS422) or single-ended signals (TTL and Open Collector) can be connected and supplied with power directly from the terminal. In 2-channel mode, both channels of the gate can be used for locking the counter and optionally as a latch for the separate storage of the counter value. Up to two latch inputs are available in single-channel mode.

The EL5112 enables the measurement of period, frequency and speed with a resolution of 10 ns. In addition, duty cycle measurement of the incoming signal is implemented.

Due to the optional interpolating micro-increment function, the EL5112 can supply even more precise axis positions for dynamic axes. In addition to that it supports the synchronous reading of the encoder value together with other input data in the EtherCAT system via the high-precision EtherCAT Distributed Clocks (DC). In addition, timestamps can be output for the last registered incremental edge, the edge at the latch input and the zero pulse track C.

Technical data 1-Kanal-Betrieb 2-Kanal-Betrieb
Encoder type incremental, differential (RS422), single-ended (TTL, Open Collector), counter, pulse generator
Number of channels 1 x A, B, C 2 x A, B
Encoder connection differential input (RS422): A, A̅, B, B̅, C, C̅ , single-ended connection (TTL, Open Collector): A, B, C differential input (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 with 4-fold evaluation, corresponding to 5 MHz,
TTL: 4 million increments with 4-fold evaluation, corresponding to 1 MHz,
Open Collector: 400 kilo increments 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
Configuration via TwinCAT System Manager
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 frequency, period duration and duty cycle measurement, microincrements, timestamp on last incremental edge, zero pulses C, latch input, gate/latch input 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
Product announcement
estimated market release 3rd quarter 2020