ATEIS DIVA8G2 - Manual (Page 164)

DIVA system 164
© 2012 ATEÏS
FigAnnexe 1
In this case, the measurement unit can only detect 0V (closed) or 4.4 V (opened).
In order to have different state measurement like open line and short-circuit we need to add a resistor
network to the end of the line, see picture below.
FigAnnexe 2
Using the resistor Network, the measurement unit can detect 4 different states: 1.3 V, 2 V, 2.7 V and
4.4 V. The 4 states correspond respectively to Shortcut, Closed Contact, Opened contact and Absent
(open line).
According to the FigAnnexe 2, you have a fully monitored line responding to the security norms.