TwinSAFE SC: 1-channel incremental encoder interface EL5151-0090
Signal LED
Gate/Latch
Signal LED B
Signal LED C 
Signal LED A 
Power contact
+24 V
Power contact 0 V
A
C
B
+24 V
0 V
Gate/Latch
Top view 
Contact assembly 

EL5151-0090 | TwinSAFE SC: 1-channel incremental encoder interface

The EL5151-0090 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 EL5151-0090 supports the synchronous reading of the encoder value, together with other input data, into the EtherCAT system via high-precision EtherCAT distributed clocks (DC).

With the aid of the TwinSAFE SC technology (TwinSAFE Single Channel) it is possible to make use of standard signals for safety tasks in any network or fieldbus. To do this, EtherCAT I/Os from the areas of analog input, position measurement or communication (4…20 mA, incremental encoder, IO-Link, etc.) are extended by the TwinSAFE SC function. The properties typical for the signals and the standard functions of the I/O components are retained. TwinSAFE SC I/Os differ optically from standard I/Os by a yellow stripe on the front of the housing.

The TwinSAFE SC technology enables communication via a TwinSAFE protocol. These connections can be distinguished from the usual secure communication via Safety over EtherCAT.

The data from the TwinSAFE SC components is fed via a TwinSAFE protocol to the TwinSAFE Logic, where it can be used in the context of safety-relevant applications. Detailed examples confirmed/calculated by the TÜV SÜD for the correct application of the TwinSAFE SC components and the respective normative classifications can be found in the TwinSAFE application manual.

Technical data EL5151-0090
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
Input signal 24 V DC
Supply voltage 24 V DC (-15 %/+20 %)
Nominal voltage 24 V DC at power contact
Resolution 1/256 bit microincrements
Current consumption power contacts typ. 100 mA + load
Current consumption E-bus typ. 130 mA
Distributed clocks yes
Special features TwinSAFE SC, 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  
EK1960 TwinSAFE Compact Controller
EL6910 TwinSAFE Logic
System  
TwinSAFE SC For further TwinSAFE SC products please see the system overview.