Function And System Design - Endress+Hauser RTA421 Technical Information

Measuring system
Alarm set point function
2

Function and system design

The RTA421 contactor monitors industrial processes for safe operation. The unit analyses current (0/4...20
mA) and voltage signals (0/2...10 V) and switches two independent output relays if the values either exceed
or undercut the preset alarm set points.
Applications include pump control in the waste water industry, level measurement in silos can be economically
achieved.
1
1 Pump
2 Signal input with loop power supply
3 Relays
Mode Minimum, Maximum
Switch threshold 00 to 99%
Hysteresis 01to 99%
Time delay 00 to 99 s
Reaction time 0.4 s
RTA421
3
2
a0016740
Endress+Hauser