BECKHOFF EL1904 - Manual (Page 19)

Product description
EL1904 17
3.7 Block diagram EL1904
24V
0V
U
Reading
input voltage
Contact
Test
input
4 times,
one for each
channel
Current
limit
Tw
in
SA
FE
The block diagram shows the basic configuration of a channel in the EL1904. The part with a red border
is present four times in the terminal.