Pp10 Latching Relay - ABB PP10 Operating Instructions Manual

4.2 PP10 Latching Relay

The PP10's primary use is as a latching circuit. This figure illustrates the proper connection of the PP10 for control-
ling a motor driven device. Operating power is usually supplied to the PP10 via a customer provided AC or DC power
distribution panel.
Note: The PP10 operating power is isolated from the motor circuit.
In the above configuration, the PP10 has been set to LLO (pumping up). This means that the PP10 relay and motor
driven device will energize when low level limit is tripped, and then deenergize when the high level limit is reached.
This circuit, for example, could be used for pumping fluid into a tank. If the PP10 were set to HLO (pumping down), the
motor would then energize when the high level limit is tripped and then deenergize when the low level limit is tripped.
Operating instruction manual | IR10/PP10 Field Indicator and Controllers 7