S7720A-EIF2-NA Kollmorgen
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The Kollmorgen S7720A-EIF2-NA is a servo drive from the S700 Servo Drives series with a voltage rating of 208 to 480 volts and a rated input power of 50 kVA. It offers a rated current of 72 Arms, peak output current of 140 Arms for 5 seconds, and features dual channel STO capability. The drive includes a fan controller expansion card, a continuous brake power of 8 kW, and coldplate with coated PCBs, weighing 13 kilograms.
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Product Description:
The S7720A-EIF2-NA is an S700 servo drive produced by Kollmorgen. It belongs to the S700 Servo Drives series and is designed to manage velocity, position, and regenerative braking for AC servomotors used in automated packaging lines, machine tools, and material-handling axes. By converting three-phase mains power into a regulated output and integrating dual-channel Safe Torque Off, the unit provides coordinated motion while supporting external energy-dissipation hardware.
The drive supplies continuous brake power of 8 kW and accepts a dedicated external brake resistor rated at 10 ohms, so dynamic braking energy is released outside the enclosure. During rapid cycles, the output stage runs at 8 kHz and can deliver a peak current of 140 Arms for five seconds before settling to a rated output of 72 Arms. Line-side demand reaches 50 kVA, and the residual DC-bus voltage drops only 6 V when the brake is triggered. An expansion card fits into the control section to operate the internal fan, while cold plate construction with coated PCBs protects the electronics from conductive dust. The permissible switching frequency is 30 operations per hour, and acoustic emission does not exceed 68 dB(A) during full-speed operation.
A minimum motor inductance of 0.61 mH is required at 480 V to keep current ripple within control limits, and the unit’s overvoltage fault threshold is set to 900 V. For short deceleration bursts, it can absorb a pulse brake load of 70 kW. The universal input window of 208 to 480 V allows the same hardware to serve worldwide mains systems, with a voltage rise rate limited to 4.8 kV/µs to protect insulation. Thermal dissipation is 1,135 W during rated service and only 24 W when disabled, aided by a cold plate that simplifies cabinet airflow. Total mass is 13 kg, enabling straightforward panel mounting.
Frequently Asked Questions about S7720A-EIF2-NA:
Q: What is the rated current output of the S7720A-EIF2-NA servo drive?
A: The S7720A-EIF2-NA has a rated current of 72 Arms for continuous operation.
Q: What input voltage range does the S7720A-EIF2-NA support?
A: This servo drive accepts input voltages ranging from 208V to 480V.
Q: What is the peak output current for the S7720A-EIF2-NA drive?
A: Peak output current can reach up to 140 Arms for up to 5 seconds on this model.
Q: What type of STO capability is present in the S7720A-EIF2-NA drive?
A: The S7720A-EIF2-NA model offers dual channel STO (Safe Torque Off) capability.
Q: What special hardware options are included in the S7720A-EIF2-NA?
A: This model includes factory options for a coldplate and coated PCBs for enhanced durability.
