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.