I/O modules • 109
Counter modules 750-404/000-003
Modular I/O System
ETHERNET TCP/IP
4.2.1.1.6 Variation
Frequency Counter Module
750-404/000-003
Technical description
The counter module also can be ordered as frequency counter module with
750-404/000-003.
The counter module 750-404/000-003 measures the period of the 24 V DC in-
put signal at the CLOCK terminal and converts it into a corresponding fre-
quency 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.