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1 –Pump 9-Station Controller Chapter 2: Functional Description 12 of 38
2-3 Standard Features
Mechanical Features
Time-fill Capability. A station’s vacuum valve remains open for a specific period of time to
allow material to be drawn in.
Volume-fill Capability. The vacuum valve will close when material covers the station’s
volume-fill proximity sensor or a specific period of time elapses, whichever comes first.
Vent Valve. The vent valve extends vacuum pump life by allowing the pump to run
unloaded (not drawing a vacuum on a station) for a specified period of time before it shuts
off. The alternative, without the vent valve would be to constantly turn the pump on and off
whenever a convey cycle is initiated.
Closed-Loop Conveying (Dry or Ambient Air). This feature allows material to be
conveyed and processed without being contaminated by outside influences (such as moisture,
other materials, etc.).
Common Purge Valve Output Control for Each Pump. This feature allows any remaining
material to be cleaned out of the material lines.
Blowback Filter Cleaning. 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 supply voltage
• 24 VDC control voltage
• Single-point power and ground connection
• Non-fused disconnect switch, lockable
• Branch circuit fusing
Controller Features
• Mitsubishi programmable control with LED display and keypad interface
• Monitors Station status and Pump status