Commissioning
6.8 Application examples
SITRANS LUT400
82 Operating Instructions, 07/2019, A5E33329501-AC
Fail-safe Alarm setup
Enable (Enable (2.8.8.1.)
Enabled By selecting Enabled, the fail-safe alarm is now
Assigned Relay (Assigned
Relay (2.8.8.2.)
(Page 204))
Relay 1 Select relay to be used for fail-safe alarm. Relay 1
is the dedicated alarm relay for the LUT400.
Continue with sampler setup.
Sampler Setup
Enable (2.11.4.1.)
Enabled By selecting Enabled, the external sampler is now
Multiplier (2.11.4.2.)
(Page 217)
1000 In this example, the LUT440 will activate the exter-
nal sampler every 1000 flow units (Flowrate Units
defined above during initial application setup).
Interval (2.11.4.3.)
(Page 217)
24 In low flow conditions where the sampler may not
activate for extended periods of time, a relay inter-
val can be programmed to allow for sampler activa-
tion after a defined number of hours. In this
example, activation should occur every 24 hours.
Relay Duration (2.11.4.4.)
0.2 Duration of time in seconds that the relay will ener-
Assigned Relay (2.11.4.5.)
(Page 217)
Relay 2 Relay 2 has been selected for control in this exam-
ple as relay 1 has been allocated to the Fail-safe
Relay Logic (2.11.4.6.)
(Page 217)
Normally Open Default for control relay functions is Normally Open.
In this example, relay 2’s coil will be Normally
Open, and will close for 0.2 seconds.
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