Dangerous Undetected Failures In This Scenario - Endress+Hauser Proserve NMS80 Functional Safety Manual

Safety function
12
I [mA]
A
B
C
A HI-Alarm ≥21 mA
B Error range ±2 %
C LO-Alarm ≤3.6 mA
4.3.1

Dangerous undetected failures in this scenario

A dangerous, undetected failure is considered to be an incorrect output signal that deviates
from the real value by more than 2 %, wherein the output signal is still in the range of
4 to 20 mA or the relay contact remains closed.
Proserve NMS80
2
1
3
4
3
t
Endress+Hauser
A0025264