S70302-PBNAS2 Kollmorgen
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The Kollmorgen S70302-PBNAS2 is part of the S700 Servo Drives series and serves as a servo drive with a rated current of 3 Arms and a rated input power of 2.2 kVA. It supports a voltage rating from 208 to 480V, has a maximum DC bus voltage of 900 VDC, and weighs 4.4 kilograms. This unit features dual channel STO capability, includes onboard EtherCAT and CANopen, and has dimensions of 70 mm width, 345 mm height, and 243 mm depth without connectors.
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Product Description:
The S70302-PBNAS2 is a servo drive produced by Kollmorgen within the S700 Servo Drives series. As a standalone amplifier, it links a control platform to a synchronous or induction motor and regulates torque, speed, and position in automated machinery. By converting the plant's three-phase mains into a controlled DC bus and a high-frequency switching output, the unit forms the core interface between motion commands generated by PLCs and the mechanical axes they govern. It is used in packaging lines, material-handling cells, and other installations where precise electrical control is required.
The drive accepts an input range of 208 to 480 V, giving it flexibility on international factory grids. Under nominal conditions, it delivers 3 Arms of continuous output and draws 2.2 kVA, which suits mid-range servo motors with a minimum inductance of 7.4 mH at 400 V. Current is modulated at an 8 kHz switching frequency, balancing acoustic noise and loop bandwidth while keeping the internal 33-ohm brake resistor within its temperature limits. The DC link can rise to 900 VDC; above that level, energy is diverted to the resistor to protect the semiconductor stages. The drive uses standard PCBs, and dual-channel STO removes drive energy without affecting upstream safety relays. At rated load, the heat sink dissipates 70 W of heat.
The housing is 70 mm wide, 345 mm high, and 243 mm deep, and it weighs 4.4 kg. These dimensions support cabinet planning in tightly packed control panels. Protection against excessive bus energy is provided in stages; the controller trips at 800 V and commands dynamic braking once the bus reaches 720 V, with a voltage rise speed of 5.7 kV/µs to limit insulation stress. When the axes are disabled, losses fall to 20 W, which reduces enclosure cooling demand. EtherCAT and CANopen ports are already on board, so no expansion card is required.
Frequently Asked Questions about S70302-PBNAS2:
Q: What voltage range does the S70302-PBNAS2 servo drive support?
A: The S70302-PBNAS2 supports input voltages from 208 to 480 V.
Q: What connectivity options are available on the S70302-PBNAS2 servo drive?
A: This model features EtherCAT and CANopen onboard but does not include an expansion card.
Q: What is the rated input power of the S70302-PBNAS2?
A: The rated input power for the S70302-PBNAS2 is 2.2 kVA.
Q: Does the S70302-PBNAS2 include an internal brake resistor?
A: A 33 Ohm internal brake resistor is included in the S70302-PBNAS2.
Q: What safety feature does the S70302-PBNAS2 offer for functional safety?
A: The S70302-PBNAS2 provides dual channel Safe Torque Off (STO) capability.
