Product overview
EL500x 17Version: 3.6
2.3 EL5001-0090
2.3.1 Introduction
Fig.11: 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.
Quick links
• EtherCAT basics
• Mounting and wiring [}30]
• Commissioning [}49]
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