AK-LM 340
RS8GV202 © Danfoss 2016-06
85
Pressure alarms (10 units)
This function can be used to monitor an external pressure.
The function can receive signals from one pressure transmitter
(P1, P2, etc.).
Set a pressure limit at which the alarm is to be activated.
It can be an alarm for pressure levels that are either too high or
too low.
The alarm will become active once the pressure has exceeded the
limit throughout the entire delay period.
DI signal
A DI signal can be defined for the function. When this signal is ON,
the function will be stopped and no alarms can be issued.
Difference pressostats (10 units)
The function can be used for:
• Pressure control with relay function
• Pressure monitoring with alarm function
Example
The pressostat can use two of the pressure transmitters (P1, P2, P3,
etc.).
The function will activate a relay depending on how great a pres-
sure difference there is between the two pressure transmitters.
The relay will cut in at a low pressure difference.
The cut-in will occur when the pressure difference has dropped
to the set value and has remained below it for the entire delay
period.
The relay will cut out again at a high pressure difference.
The cut-out will occur when the pressure difference has exceeded
the set value and has remained above it for the entire delay pe-
riod.
A high alarm limit can be set. If the pressure difference becomes
greater than the set value, an alarm will be issued, but only once
the delay period has elapsed.
A low alarm limit can be set. If the pressure difference becomes
lower than the set value, an alarm will be issued, but only once the
delay period has elapsed.
DI signal
A DI signal can be defined for the function. When this signal is ON,
the differential pressure function will be stopped and the relay will
cut out.