Rhein-Nadel Automation GmbH 6
VT-BA-ESR-ESM3000-EN_2021.docx / 15 March 2021
The controllers of the ESR 3000 / ESM 3000 series are specially adapted variable frequency drive units for
vibratory feeder control. The devices generate a mains independent output frequency for the vibratory
feeder. Therefore an exact tuning of the springs or weight compensation are not required. The sinusoidal
output current provides for smooth operation of the feeder. The set vibrating frequency corresponds to the
mechanical vibrating frequency of the feeder. The optimum vibrating frequency for the feeder is determined
and adjusted manually, or automatically in controller mode.
Depending on system configuration, an acceleration sensor installed on the feeder enables the devices to
operate at the resonance frequency of the feeder while in controller mode. Thus a load independent feeder
operation can be achieved and the material flow remains almost constant. In closed-loop control mode the
output frequency of the controller is dynamically adapted to the resonance frequency of the feeder which
changes depending on the load. If the vibratory feeder is in open-loop control mode (without sensor), the
set output frequency remains constant. In both cases the feed rate is adjusted via the magnitude of the out-
put voltage.
The devices are available in two versions: for cabinet mounting or as enclosed units.
Special features:
• Mains independent adjustable output frequency
• Adjustable min. and max. limits of the frequency range
• Adjustable current limit for maximum solenoid current
• Constant feed rate even during mains fluctuations
• Closed-loop control mode, automatic frequency search (resonance frequency), not for ESR3000/6A
• Status relay on / off
• Level control
• 24 V, DC output for e.g. air valve
• Storage of four user-specific parameter sets
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