TwinSAFE SC: 4-channel input terminal PT100 (RTD) for 3-wire connection EL3214-0090
Power contact
+24 V
Power contact 0 V
Top view 
Contact assembly 
extended temperature range

EL3214-0090 | TwinSAFE SC: 4-channel input terminal PT100 (RTD) for 3-wire connection

The EL3214-0090 analog input terminal allows four resistance sensors to be connected directly. The EtherCAT Terminal circuit can operate sensors using the 3-wire technique. A microprocessor handles linearisation across the whole temperature range, which is freely selectable.

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.

Technical data EL3214-0090
Number of inputs 4
Power supply via the E-bus
Technology Temperature measurement (RTD)
Signal type differential
Distributed clocks
Input filter limit frequency typ. 1 kHz
Sensor types PT100, PT200, PT500, PT1000, Ni100, Ni120, Ni1000 resistance measurement (e.g. potentiometer, 10 Ω…1.2/4 kΩ), KTY sensors (types see documentation)
Conversion time approx. 170 ms default setting
Measuring current < 0.5 mA (load-dependent)
Measuring range -200…+850 °C (PT sensors); -60…+250 °C (Ni sensors)
Temperature range -200…+850 °C (PT sensors); -60…+250 °C (Ni sensors)
Resolution 0.1 °C per digit
Measuring error < ±0.5 °C for PT sensors, 4 x 3-wire connection
Electrical isolation 500 V (E-bus/signal voltage)
Current consumption power contacts
Current consumption E-bus typ. 140 mA
Special features TwinSAFE SC, integrated digital filter, limit value monitoring, variable connection technology
Weight approx. 60 g
Operating/storage temperature -25…+60 °C/-40…+85 °C
Relative humidity 95 %, no condensation
Vibration/shock resistance conforms to EN 60068-2-6/EN 60068-2-27
EMC immunity/emission conforms to EN 61000-6-2/EN 61000-6-4
Protect. class/installation pos. IP 20/variable
Approvals/markings CE, UL
Related products  
EK1960 TwinSAFE Compact Controller, 20 safe inputs, 24 safe outputs (2 A), TwinSAFE Logic
EL6910 TwinSAFE Logic, PROFIsafe master and slave support
TwinSAFE SC For further TwinSAFE SC products please see the system overview.