Description
Dual run-time meters
Selectable lead-lag or automatic alternation
Four sensing levels
Alarm Outputs
Hand-off-auto controls
The Model 403D Liquid Level Controller provides central control of duplex pumping systems. It includes pump alternating, individual run-time meters, hand-off-auto controls and alarm outputs.
Four 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 120VAC 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.















