The EL3124-0090 analog input terminal handles signals in the range

from 4 to 20 mA. The current is digitized to a resolution of 16 bits

and is transmitted, in an electrically isolated form, to the higher-level

automation device. The input channels of the EtherCAT Terminal have

differential inputs and possess a common, internal ground potential.

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.