The Model 407 Liquid Level Controller provides central control of triplex pumping systems. The Model 407 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 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.
If either circuit opens, the corresponding pump will be locked out until the problem is corrected and the ‘Alarm reset’ switch is pressed.
| Document | File Type | File Size | Download |
| Model 407 Datasheet | 675 KB |  |
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