The EL3174 analog input terminal has four individually parameterizable inputs. Signals in the range from -10/0 to +10?V or -20/0/+4 to +20?mA can be processed via each channel. Physically, the voltage and current signals should be connected to different terminal points. Each channel should then be set by the controller/TwinCAT?to U or I mode via CoE. The voltage inputs operate differentially; the current inputs are single-ended. All inputs are digitized with a resolution of 16?bits and transmitted, electrically isolated, to the higher-level automation device. With a technical measuring range of ±107?% of the nominal range, the terminal also supports commissioning with sensor values in the limit range and diagnostics according to NAMUR?NE43.

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.