optris CTratio
– E2013-04-A
25
All alarms have a fixed
hysteresis of 2 K
.
Alarms
The CTratio has the following Alarm features:
Visual Alarms
These alarms will cause a change of the color of the LCD display and will also change the status of the
optional relays interface.
Digital Alarm 1 and 2
Both of the I/O pins can be programmed as alarm output. In this case the pin acts as an open collector
output (24 V/ 1A).
The following signal sources can be selected:
T 2C/ T 1C/ Attenuation/ TBox/ TProcess (Temperature signal which has been selected for the analog
output)
Different wirings of the open collector output
For a setup of the alarm values, selection of the signal sources and definition as high or low alarm (via change of
normally open/ closed) the programming interface (USB) including the software is needed.
