Counter Module 750-404
8
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Frequency Counter Module, 750-404/000-003
0V
0V
24V
24V
S
S
+E2
750-404
G
Clk
Q1
Q2
+
+
-
-
Q1
Status Gate
Gate
power jumper
contacts
Clock
24V
Status CLOCK
Q2
0V
Q1
Q2
000-003
Technical Description
The counter module 750-404/000-003 measures the period of the 24 V DC input signal
at the CLOCK terminal and converts it into a corresponding frequency value. The
measurement is enabled if the GATE terminal is an open circuit input or 0V. To disable
processing, the GATE input is to be set to 24 V DC.
The terminals O1 and O2 work as binary outputs. Each output can be activated via
specific bits in the CONTROL byte.
The high states of the input and output channels are each indicated by a LED.
To recognize low frequency or near zero frequency signals, the maximum time between
two data updates is parameterizable.
O2
O1
O2
O1
O2
O1