TwinSAFE SC: SSI encoder interfaces EL5001-0090
Run LED 1 
Power contact
+24 V
Power contact 0 V
+24 V
0 V
Top view 
Contact assembly 

EL5001-0090 | TwinSAFE SC: SSI encoder interfaces

The EL5001-0090 SSI interface EtherCAT Terminal allows an SSI encoder to be connected directly. The interface circuit generates a pulse for reading the encoder and makes the incoming data stream available to the controller as a data word in the process image. Various operating modes, transmission frequencies and bit widths can be permanently stored in a control register.

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 EL5001-0090
Technology SSI encoder interface
Number of channels 1
Encoder connection D+, D-, Cl+, Cl-
Signal output (pulse) difference signal (RS422)
Signal input (data) difference signal (RS422)
Power supply 24 V via power contacts
Current consumption typ. 20 mA without encoder
Encoder supply 24 V DC via power contacts
Data transfer rates variable up to 1 MHz, 250 kHz default
Serial input 24 bit width (variable)
Data direction read
Current consumption power contacts typ. 20 mA
Current consumption E-bus typ. 120 mA
Distributed clocks yes
Special features TwinSAFE SC, adjustable baud rate, coding and data length
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
Pluggable wiring for all ESxxxx terminals
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.