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S7720F-DNF2-PM

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The S7720F-DNF2-PM is a digital servo amplifier produced by Kollmorgen. The amplifier is designed to be used exclusively for synchronous, asynchronous, and DC motors. It belongs to the overvoltage category III and features a built-in air blower that maintains dissipates excess heat by forced ventilation. A 3-character display is integrated into the front panel of the amplifier to communicate operation status.

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Product Description

The S7720F-DNF2-PM is a new-generation industrial servo amplifier designed by the highly trained engineers of Kollmorgen. The servo amplifier is designed to improve industrial operation process by carrying out the accurate control of the speed, position, and torque output of servo motors. It is intended to be used exclusively for synchronous, asynchronous, and DC servo motors. This amplifier is designed according to international quality and safety standards, it features a modular design and is sold with a 12-month warranty. A 3-character LED display unit is integrated into the front panel of the servo amplifier, the display serves a user-friendly interface for operators to monitor the operation status of the servo amplifier in real time. The S7720F-DNF2-PM servo amplifier can be used in residential and commercial areas, however operators will be required to provide additional measures to protect the amplifier from electrical interference.

The S7720F-DNF2-PM servo amplifier operates with a rated supply voltage that falls between 208 to about 480 volts, also the input power required by the servo amplifier for continuous operation is about 50 kilovolts amperes. The servo amplifier also has a current rating of 72 amperes, and a maximum output current rating of 140 amperes. An efficient air blower is integrated into the housing of this servo amplifier, the air blower dissipates excess heat from the amplifier via forced ventilation.

Special expansion cards are integrated into this servo amplifier to improve its operation, some of the expansion cards include the Fan controller expansion card which reduces the noise generated by the amplifier, and the PosI/O expansion card. The maximum permissible installation height for the S7720F-DNF2-PM servo amplifier is about 1000 meters above sea level.

S7720F-DNF2-PM Technical Specifications

Protection class: IP20
Maximum noise Emission : 68dB
Current Rating: 72A
Maximum input current: 140A
Cooling: Forced ventilation
Voltage rating: 208 to 480V
Weight: 13kg
Compatible Memory cards: SD and MMC memory card
Permitted Switch on/off frequency: 30 1/h
Form factor of the output current: 1.01

Frequently Asked Questions about S7720F-DNF2-PM


Q: How can operators reduce leakage current in the electrical connection of the S7720F-DNF2-PM amplifier?

A: Leakage current can be minimized by reducing the length of the engine cable, removing external EMC filters and using low capacity cables.

Q: When does the S7720F-DNF2-PM servo amplifier require an isolating transformer?

A: Isolating transformers are required when protection against indirect contect is absolutley essential or when and alternative form of shock harzard protection is sought.

Q: What does the Safe Torque Off function do?

A: The Safe Torque Off function is exclusively intended to provide functional safety by prevening the unexpected restart of servo motors during standstill.

Q: Can the Safe Torque Off function be used in emergency stop situation?

A: No. In an emergency-off situation the main contactor should be swiched off through the emergency-off button.

Q: What type of enclosure should be used for the S7720F-DNF2-PM servo amplifier?

A: The amplifier should be installed in an enclosure ensuring the safe operation of the device. The enclosure must meet at least the IP54.

Internal Product Review

  • ‘‘Very sturdy and well built. It has a nice 3-character display that makes control very easy.’’

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