4-channel analog input, -10/0…+10 V, -20/0/+4…+20 mA, 16 bit EL3174
Run LED
Err LED
CH1...4
Power contact
+24 V
Power contact 0 V
Ch1 U+ 
Ch2 U+ 
Ch3 U+ 
Ch4 U+ 
+24 V 
+24 V 
+24 V 
+24 V 
Ch1 U-
Ch2 U-
Ch3 U-
Ch4 U-
Input Ch1
Input Ch2
Input Ch3
Input Ch4
Top view 
Contact assembly 

EL3174 | 4-channel analog input, -10/0…+10 V, -20/0/+4…+20 mA, 16 bit

The EL3174 analog input terminal has four individually parameterisable 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 digitised 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.

Technical data EL3174
Number of inputs 4
Power supply via the E-bus
Technology U differential, I single-ended
Oversampling factor
Distributed clocks yes
Distributed clock precision << 1 µs
Internal resistance > 200 kΩ | 85 Ω typ
Input filter limit frequency 5 kHz
Common-mode voltage UCM 35 V max. (voltage measurement)
Dielectric strength max. 30 V (current measurement)
Conversion time minimum 150 µs
Measuring range, nominal -10/0…+10 V | -20/0/+4…+20 mA
Measuring range, technical -10.73…+10.73 V | -21.47…+21.47 mA
Resolution 16 bit (incl. sign)
Measuring error < ±0.3 % (relative to full scale value)
Electrical isolation 500 V (E-bus/signal voltage)
Current consumption power contacts
Current consumption E-bus typ. 200 mA
Bit width in the process image inputs: 16 byte
Configuration no address or configuration setting
Special features U/I parameterisable, ExtendedRange,standard and compact process image, activatable FIR/IIR filters
Weight approx. 65 g
Operating/storage temperature 0…+55 °C/-25…+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 CE