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The alarm relay will only close if the pressure stays below the set point
margin for a predetermined time.
If you decide to use the alarm relay, it can be configured in the following
ways:
The alarm relay would only close if the pressure stays above the high
pressure margin for the predetermined time.
If the pump is stopped on any fault condition the alarm relay will close its
contacts. This can be used for an alarm light or, perhaps, a dialer to alert the
operator of a problem.
This configuration means the alarm relay will mimic the main pump relay. It
will be on when the pump is on and off when the pump is off. Since Relay 1
and Relay 2 are electrically and mechanically separate this configuration
allows two separate circuits to be controlled in synergy.
This menu choice only closes the alarm relay if a true loss of flow is detected.
In any other fault condition the IPG20 will shut the pump down and display
an appropriate message as to what the fault was but the alarm relay will
remain open unless the specific condition, in this case loss of flow, is
detected.
With this choice, the alarm relay will act as a set of contacts that are the
reverse of the main pump relay’s contacts. When the pump relay (Relay 1)
is on the alarm relay’s contacts will be open and when the pump relay is
off the alarm relay’s contacts will be closed. This configuration has all
manner of applications in general control and in operating peripheral
equipment.
Closed only if flow stops
Closed
if any fault develops
Closed whenever pump is on
Closed whenever pump is off
Closed on a low pressure fault
Closed on a high pressure fault
This will also enable valve sequencing further in the program.
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