EL3124-0090 – Introduction
Fig.33: EL3124-0090EtherCAT Terminal, 4-channel analog input, current, 4 … 20 mA, 16-bit, differential, TwinSAFE SC
The EL3124-0090 analog input terminal processes signals in the range 4 … 20 mA. The current is digitized to a resolution of 16 bits and transmitted, electrically isolated, to the higher-level automation device. The input channels of the EtherCAT Terminal are differential inputs and possess a common, internal ground potential.
The TwinSAFE SC technology (TwinSAFE Single Channel) enables the use of standard signals for safety tasks in any networks or fieldbuses. To do this, EtherCAT I/Os from the areas of analog input, angle/displacement measurement, or communication (4 … 20 mA, incremental encoder, IO-Link, etc.) are extended by the TwinSAFE SC function. The typical signal properties and standard functionalities of the I/O components are retained.
TwinSAFE SC I/Os have a yellow strip at the front of the housing to distinguish them from standard I/Os.
The TwinSAFE SC technology enables communication by means of a TwinSAFE protocol. These connections can be distinguished from the usual safe communication by means of Safety over EtherCAT.
The data from the TwinSAFE SC components is transferred by means of a TwinSAFE protocol to the TwinSAFE Logic, where it can be used in the context of safety-relevant applications. Detailed examples of the correct application of the TwinSAFE SC components and the respective normative classification, which have been confirmed/calculated by TÜV SÜD, can be found in the TwinSAFE application guide.