2-channel incremental encoder interface, 5 V single-ended (TTL, Open Collector) EL5122
A1
B1
A2
B2
PowerEnc.
gate/latch 1
Run
Diag
gate/latch 2
Input A1 
Input B1 
Input A2 
Input B2
  
Encoder
supply +UE
Encoder
supply -U0
 
latch/gate 1 
Encoder
supply +UE2
Encoder
supply -U02
 
latch/gate 2
Top view 
Contact assembly 
XFC – eXtreme Fast Control

EL5122 | 2-channel incremental encoder interface, 5 V single-ended (TTL, Open Collector)

The EL5122 EtherCAT Terminal is an interface for the direct connection of two incremental encoders with A and B tracks. Encoders with single-ended signals (TTL and Open Collector) can be connected and supplied with power directly from the terminal. The gate on each channel can be used for locking the counter and optionally as a latch for the separate storage of the counter value.

The EL5122 enables the measurement of period, frequency and speed with a resolution of 10 ns. Support for the high-precision EtherCAT Distributed Clocks (DC) enables the synchronous reading of the encoder value together with other input data in the EtherCAT system.

Technical data EL5122
Encoder type incremental, single-ended (TTL, Open Collector), counter, pulse generator
Number of channels 2 x A, B
Encoder connection single-ended connection (TTL, Open Collector): A, B,
counter, pulse generator: A, B
Additional inputs 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 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
Configuration via TwinCAT System Manager
Current consumption power contacts typ. 10 mA + load
Current consumption E-bus typ. 190 mA
Wiring fail indication
Distributed clocks yes
Special features 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)
EL5112 2-channel incremental encoder interface, 5 V (2 x AB or 1 x ABC RS422, TTL)
EL5131 2-channel incremental encoder interface, 5 V with two parameterizable 24 V DC outputs
Product announcement
estimated market release 3rd quarter 2020