Failsafe; Sensor Setup Ctratio - I/O Pins - optris CompactPlus Connect Operator's Manual

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46 CTratio

2.3.2. Failsafe

The pyrometer has a failsafe function that can be used in analog
mode.
The range can be configured as desired. The settings for fail-safe
operation allow a defined level to be output at the analog output
depending on specified temperature limits.
Thus, a possible cable defect can be detected quickly.
Sensor Setup CTratio – I/O pins
2.4.
The CTratio has three I/O pins which can be programmed as in- or outputs using the software. The following
options are available:
Function I/O pin acts as
Alarm output (digital)
Valid Low input (digital)
Valid High input (digital)
Hold Low-High input (digital)
Description
Open collector output/ definition as HIGH- or LOW alarm via norm. open/
norm. close options in software dialog.
The output follows the process 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.
The output follows the process 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.
The last value will be held if there is a signal with a rising edge on the I/O
pin.
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