Product overview
EL37x2
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Version: 3.5
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Product overview
3.1
EL3702 - Introduction
Fig. 9: EL3702
Two-channel analog input terminal, differential inputs, -10 V … +10 V with oversampling
The EL3702 analog input terminal handles signals in the range from -10 V to +10 V. The voltage is digitized
to a resolution of 16 bits, and is transmitted, electrically isolated, to the controller. The input channels of the
EtherCAT Terminals have differential inputs and possess a common, internal ground potential.
The signals are sampled with a configurable, integer multiple (oversampling factor: n) of the bus cycle time
(n microcycles per EtherCAT bus cycle). The EtherCAT Terminal generates a set of n process data per
channel for each EtherCAT bus cycle, which is accumulated and transferred in the next bus cycle. The
timebase of the terminal can be synchronized 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.
Responses at equidistant intervals are made possible in conjunction with the EL4702/EL4732 (analog output
terminal with oversampling) or any other distributed clocks-capable EtherCAT device.
The maximum sampling rate of the EL3702 is 100 ksps (10 µs sampling) at a recommended input signal
bandwidth of 0..30 kHz.
Information on the distributed clocks can be found in the separate System description.
Quick links
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EtherCAT basics
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Basic function principles [
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Process data and configuration [
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Summary of Contents for EL3702
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