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 shock and vibration range 25g

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. The standard functions and features of the I/Os remain available. The data from these TwinSAFE SC I/Os is fed to the TwinSAFE Logic, where they undergo safety-related multi-channel processing. In the Safety Logic the data originating from different sources is analysed, checked for plausibility and submitted to a “voting”. This is done by certified function blocks such as Scale, Compare/Voting (1oo2, 2oo3, 3oo5), Limit, etc. For safety reasons, however, at least one of the data sources must be a TwinSAFE SC component. The remainder of the data can originate from other standard I/Os, drive controllers or measuring transducers.

With the aid of the TwinSAFE SC technology it is typically possible to achieve a safety level equivalent to PL d/Cat. 3 in accordance with EN ISO 13849-1 or SIL 2 in accordance with EN 62061.

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 0…+55 °C/-25…+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 CE, Ex
Further information
TwinSAFE SC TwinSAFE SC technology
Related products  
EK1960 TwinSAFE Compact Controller
EL6910 TwinSAFE Logic