Beckhoff EL3702 | EtherCAT Terminal, 2-channel analog input, voltage, ±10 V
The EL3702 analog input terminal handles signals in the
range between -10 and +10 V. The voltage is digitized 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 frequency
(n microcycles per bus cycle). For each bus cycle, 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 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.
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 synchronized in almost any configuration. The maximum
sampling rate per channel is 100 ksamples/s (100.000 samples/s).