Introduction
4-channel input terminal, thermocouple with wire break detection, TwinSAFE Single Channel
The EL3314-0090 analog input terminal is based on the EL3314, but is also equipped with the TwinSAFE SC function.
The EL3314-0090 analog input terminal allows four thermocouples to be connected directly. The EtherCAT Terminal circuit can operate thermocouple sensors using the 2-wire technique. A microprocessor handles linearization across the whole temperature range, which is freely selectable. Cold junction compensation is made through an internal temperature measurement at the terminals. The EL3314-0090 can also be used for mV measurement.
The TwinSAFE SC technology (TwinSAFE Single Channel) enables the use of standard signals for safety tasks in any networks or fieldbuses. The standard functionalities and features of the I/Os are retained. The data of the TwinSAFE SC I/Os are routed to the TwinSAFE logic and processed there in a multichannel safety-related manner. In the Safety Logic the data originating from different sources are analyzed, checked for plausibility and submitted to a ‘voting’. This is done using certified function blocks such as Scale, Compare/Voting (1oo2, 2oo3, 3oo5), Limit, etc. For safety reasons, at least one of the data sources must be a TwinSAFE SC component. The remainder of the data can originate from other standard bus terminals, drive controllers or measuring transducers.With the aid of the TwinSAFE SC technology it is typically possible to achieve a safety level equivalent to PL d/Cat. 3 in accordance with EN ISO 13849-1 or SIL 2 in accordance with EN 62061.