2-channel analog input terminal -10…+10 V with oversampling EL3702
Run LED 2
Run LED 1 
Power contact
+24 V
Power contact 0 V
+Input 1
-Input 1
+Input 2
-Input 2
Top view 
Contact assembly 
XFC – eXtreme Fast Control
extended temperature range
extended shock and vibration range

EL3702 | 2-channel analog input terminal -10…+10 V with oversampling

The EL3702 analog input terminal handles signals in the range between -10 and +10 V. The voltage is digitised to a resolution of 16 bits, and is transmitted, electrically isolated, to the controller. The signals are oversampled with an adjustable, integer multiple (oversampling factor: n) of the bus cycle time (n microcycles per bus cycle). For each microcycle, the EtherCAT Terminal generates a process data block that is transferred collectively during the next bus cycle. The time base of the terminal can be synchronised precisely with other EtherCAT devices via distributed clocks. This procedure enables the temporal resolution of the analog input signals to be increased to n times the bus cycle time. In conjunction with the EL47xx (analog output terminal with oversampling), responses with equidistant time intervals, e.g. in the event of a threshold value being exceeded, become possible.

The distributed clocks function enables several EL3702 devices to be synchronised in almost any configuration. The maximum sampling rate per channel is 100 ksamples/s (100,000 samples/s).

Technical data EL3702 | ES3702
Number of inputs 2 (differential)
Power supply via the E-bus
Technology differential input, oversampling
Signal voltage -10…+10 V
Max. sampling rate max. 10 µs/100 ksps (per channel, simultaneously)
Oversampling factor n = 1…100 selectable (max. 100 ksamples/s)
Input signal bandwidth 0…30 kHz recommended
Distributed clocks yes
Distributed clock precision << 1 µs
Internal resistance > 200 kΩ
Input filter limit frequency 80 kHz
Common-mode voltage UCM max. 35 V
Conversion time ~ 10 µs per sample
Resolution 16 bit (incl. sign)
Measuring error < ±0.3 % up to 10 Hz (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 input: n x 2 x 16 bit data; optionally 2 x 16 bit cycle counter, 4 byte StartNextLatch time
Special features oversampling
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
Pluggable wiring for all ESxxxx terminals
Approvals/markings CE, UL, ATEX, IECEx
Ex-Marking II 3 G Ex nA IIC T4 Gc
Ex nA IIC T4 Gc
Ex tc IIIC T135 °C Dc
Further information  
XFC eXtreme Fast Control Technology