EL3174-0090 – Introduction
Fig.86: EL3174-0090EtherCAT Terminal, 4-channel analog input, multi-function, ±10 V, ±20 mA, 16-bit, TwinSAFE SC
The EL3174-0090 analog input terminal has four individually parameterizable inputs. Signals either in the range -10/0 … +10 V or in the range -20/0/+4 … +20 mA can be processed per 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 the evaluation according to NAMUR NE43.
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.
 | 107 % extended range The EL3174/ EL3174-00xx are pre-set to 107 % measuring range, e.g. 0x7FFF corresponds to +10.737 V or 3.22 V. The previously known legacy range can be reset via CoE access. Then 0x7FFF will correspond to the full scale value again (FSV, e.g. 10 V/ 3 V). |