Outputs and Inputs
33
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5.5 Alarms
The CTratio has the following Alarm
features:
Visual Alarms
These alarms will cause a change of the color of the LCD display.
Digital Alarm 1, 2, 3
All the I/O pins can be programmed as alarm output. In this case the pin acts as an open collector output
(24 V/ 1 A).
The following signal sources can be selected:
TProc/ TRatio/ T1/ T2/ Attenuation/ TDet/ TBox
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.
Different wirings of the open collector output
All alarms have a fixed
hysteresis of 2 K
.
