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L. Set Point Operation
When pressure values have been entered for a set point (1 or 2) and assigned to a gauge (1 or 2),
the set point relay operates as follows:
As the pressure on the assigned gauge falls through the chosen “Set Point N Low” pressure, the
relay actuates, either opening (if the Normally Closed pin has been used on the Auxiliary I/O con-
nector) or closing (if the Normally Open pin has been used on the Auxiliary I/O connector).
Likewise, as the pressure on the assigned gauge rises through the chosen “Set Point N High” pres-
sure, the relay de-actuates, either closing (if the Normally Closed pin has been used on the Aux-
iliary I/O connector) or opening (if the Normally Open pin has been used on the Auxiliary I/O
connector).
Figure 10: Protective Circuits for Connecting Loads to Set Point Relays
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