S7720F-PBF2-PA Kollmorgen
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The S7720F-PBF2-PA is a servo drive from the S700 Servo Drives series by Kollmorgen. It has a rated current of 72 Arms, peak output current of 140 Arms, and requires input voltages from 208 to 480 V. The drive features a dual channel STO capability and weighs 13 kilograms, with dimensions of 190 mm by 386 mm by 244 mm.
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Product Description:
The S7720F-PBF2-PA belongs to the Kollmorgen S700 Servo Drives series and functions as a configurable servo drive for closed-loop motion in factory automation. By converting a three-phase mains supply into controlled AC for synchronous or asynchronous motors, the unit regulates speed, torque, and position while providing safety through an integrated STO channel. It is suited to centralized control cabinets that coordinate multiple servo axes, where the drive must respond quickly to changing load demands and follow command updates from a higher-level controller. Its compact architecture supports cabinet installation in machinery where stable current control and fast switching are required.
The analog command interface presents an input resistance of 20 kΩ, which helps reduce loading on upstream controllers, and it re-transmits feedback through an output range of ±10 V for monitoring tasks. During dynamic moves, the amplifier can deliver a peak output of 140 Arms, while continuous operation is supported at 72 Arms. A supply capability of 50 kVA matches the rated input power required from the plant mains, and a residual voltage drop of 6 V helps maintain motor voltage during high-current events. Two 9-pin SubD Profibus connectors link the drive to fieldbus networks, and the unit is limited to 30 power switch-on or switch-off cycles per hour. Surface noise stays below 68 dB(A), and either conformal-coated or standard PCBs can be used in areas with elevated humidity or airborne contaminants.
The drive accepts a line voltage from 208 to 480 V and modulates its IGBT output at 8 kHz, balancing current ripple against switching losses. At 480 V, the thermal design must dissipate 1135 W, which is managed by forced air and a large aluminum heat sink. Safe torque off is provided as a dual channel STO function, allowing certified power isolation without external contactors. The housing has an overall mass of 13 kg, with a width of 190 mm, depth of 244 mm, and height of 386 mm for cabinet layouts where space and airflow must be controlled.
Frequently Asked Questions about S7720F-PBF2-PA:
Q: What is the maximum peak output current for the S7720F-PBF2-PA servo drive?
A: This drive provides a peak output current of 140 Arms, supporting demanding servo applications.
Q: What is the input voltage range for the S7720F-PBF2-PA servo drive?
A: The S7720F-PBF2-PA is rated for input voltages between 208V and 480V, accommodating a wide range of industrial power sources.
Q: What type of Safe Torque Off (STO) functionality does the S7720F-PBF2-PA have?
A: The drive supports a dual channel Safe Torque Off (STO), enhancing safety by providing redundant disconnection capability.
Q: How much heat does the S7720F-PBF2-PA servo drive dissipate at 480 V?
A: At 480 V, this model dissipates 1135 W of heat during operation and requires consideration for efficient cooling.
Q: How many Profibus connectors are available on the S7720F-PBF2-PA and what type are they?
A: The S7720F-PBF2-PA features two 9-pin SubD Profibus connectors for network integration.
