407D

407D

The Model 407D 3-Pump Liquid Level Controller provides central operating control of triplex pumping systems. The solid-state electronic controller provides alternating of load pumps, low level cutoff and high level alarm outputs. Runtime meters provide instant visual data on total running time of each pump motor. LED indicators show ON/OFF status of each pump. The 407D has five level-sense inputs which can be activated by float switches or other level sensing devices which provide a switch closure.

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Description

The Model 407D Liquid Level Controller provides central control of triplex pumping systems. The Model 407D includes pump alternating, visual run-time meters, hand-off-auto (HOA) controls and alarm outputs.

Five level-sense inputs interface with float switches, pressure switches, or other level sensing devices which can provide a contact closure.

A SPST, normally-closed internal power-fail contact opens when AC power (120 VAC) is connected to the controller, and closes if power is lost or removed.

Connections for external remote alarm contacts, which must remain closed for normal operation (or jumpered if not required), are supplied for each pump. If either circuit opens, the corresponding pump will be locked out until the problem is corrected and the ‘Alarm reset’ switch is activated.