Relay Function; Alarm - Siemens SITRANS LUT400 Operating Instructions Manual

General Operation
7.2 Relays
7.2.2

Relay function

7.2.2.1

Alarm

Level
In high alarm, the alarm state becomes active when the level rises to High Level Value ON
and inactive when it falls below High Level Value OFF. In low alarm, the alarm state
becomes active when the level falls to Low Level Value ON and inactive when the level rises
above Low Level Value OFF.
In-bounds
The relay alarm becomes active if the level is inside a user-defined range.
Out-of-bounds
The relay alarm becomes active if the level is outside a user-defined range.
Temperature
In high alarm, the alarm state becomes active when the temperature rises to High
Temperature Value ON and inactive when the temperature falls below High Temperature
Value OFF. In low alarm, the alarm state becomes active when the temperature falls to Low
Temperature Value ON and inactive when the temperature rises above Low Temperature
Value OFF.
Switch (Discrete Input)
The relay alarm state associated with the discrete input becomes active when the discrete
input is in a user-defined state.
Fail-safe fault
The relay alarm state becomes active when a fault that has caused a fail-safe condition is
present. The relay alarm state becomes inactive when no faults that cause fail-safe are
present.
Flowrate
Available for LUT440 (OCM) model only.
In high alarm, the alarm state becomes active when the flowrate exceeds High Flowrate
Value ON and inactive when the flowrate falls below High Flowrate Value OFF. In low alarm,
the alarm state becomes active when the flowrate falls below Low Flowrate Value ON and
inactive when the flowrate rises above Low Flowrate Value OFF.
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Operating Instructions, 07/2019, A5E33329501-AC
SITRANS LUT400