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5.2 I/O pins
The CTratio has three digital pins which can be programmed as outputs (digital) or as inputs (digital or
analog) using the Ratio Connect software. The following functions are available:
Function
I/O pin acts as
Description
Digital Alarm
output digital
Open collector output/ definition as HIGH- or LOW alarm via
norm. open/ norm. close options in software dialog.
Valid LO
input digital
The output follows the object temperature as long as there is
a Low level at the I/O pin. After discontinuation of the Low
level the last value will be held.
Valid HI
input digital
The output follows the object temperature as long as there is
a High level at the I/O pin. After discontinuation of the High
level the last value will be held.
Hold ‗/¯
input digital
The last value will be held if there is a signal with a rising
edge on the I/O pin.
Hold ¯\
‗
input digital
The last value will be held if there is a signal with a falling
edge on the I/O pin.
Hold Reset LO
input digital
Reset of Peak or valley hold (HI-LO signal)
Hold Reset HI
input digital
Reset of Peak or valley hold (LO-HI signal)
Slope external
input analog
The slope value can be adjusted via a 0-10 V signal on the
I/O pin (scaling possible via software).
Emiss. external
input analog
The emissivity value can be adjusted via a 0-10 V signal on
the I/O pin (scaling possible via software).
High-level:
Via software
Low-level:
Via software
