TwinSAFE SC: 1-channel SinCos encoder interface, 1 V<span class="EFF_MAX_subscript">PP</span> EL5021-0090
Error LED
Run LED 
Power contact
+24 V
Power contact 0 V
5 V UP encoder
0 V encoder
Top view 
Contact assembly 
extended temperature range

EL5021-0090 | TwinSAFE SC: 1-channel SinCos encoder interface, 1 VPP

The EL5021-0090 SinCos EtherCAT Terminal allows direct connection of a measuring sensor, e.g. a linear measuring scale with sinusoidal voltage output 1 VPP. The measuring signal is processed, interpolated and made available as a 32 bit value. At the same time, an offset, gain and phase error compensation is carried out. The input frequency for the measuring signal inputs is 250 kHz with a signal period resolution of max. 13 bit. In addition, the reference mark can also be stored as a 32 bit value.

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 EL5021-0090
Technology SinCos encoder interface for differential 1 VPP signal
Number of channels 1
Encoder connection A, A (inv), B, B (inv), C,C (inv)
Input frequency 250 kHz (scanning of the input signals with 70 MHz)
Commands set count, evaluate reference mark latch (C/C [inv]), change of direction, frequency control
Power supply 24 V via power contacts
Current consumption 130 mA
Nominal voltage 24 V at power contact, 5 V encoder supply built in
Sensor supply 5 V DC from power voltage, 0.5 A max.
Resolution max. 13 bit, 1024 steps per period
Signal input 1 VPP
Current consumption power contacts typ. 50 mA without connected sensor
Current consumption E-bus typ. 120 mA
Distributed clocks yes
Special features TwinSAFE SC, latch, reset, amplitude and frequency error recognition, frequency-dependent period resolution, frequency counter max. 24 bit
Electrical isolation 500 V (E-bus/field potential)
Weight approx. 55 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
Approvals/markings CE, UL, ATEX
Ex-Marking II 3 G Ex nA IIC T4 Gc
Related products  
EK1960 TwinSAFE Compact Controller, 20 safe inputs, 24 safe outputs, TwinSAFE Logic
EL6910 TwinSAFE Logic, PROFIsafe master and slave support
TwinSAFE SC For further TwinSAFE SC products please see the system overview.