2-3 Standard Features
Mechanical Features
Vent Valve Output. The vent valve protects the pump motor from damage during high vacuum conditions if an undetected failure of the vacuum switch should occur. The vent valve limits system vacuum by allowing a plunger in the valve to shift and vent the pump.
Common Purge Valve Output Control for Each Pump. This feature allows any remaining material to be cleaned out of the vacuum pump or station.
Local Blowback Filter Cleaning Outputs. When this feature is enabled, the controller periodically sends compressed air backward through the pump’s air filter to dislodge accumulated dust and debris.
Electrical Features
•115/1/60 or 230/1/50/60 supply voltage
•24 VDC control voltage
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•Branch circuit fusing
•Fully accessible NEMA
Controller Features
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•Diagnostics, operating instructions and parts information are built into the interface
•Controls up to fifty (50) stations and up to seven (7) Vacuum Power Units.
•Controls up to three central alarms
•Allows operator to transfer stations to a standby pump when a pump fails
•Electronic time delay between pump startups to prevent an excessive power demand at your facility
7/50D Plus or 7/50D Controller | Chapter 2: Functional Description | 11 |