S70302-PBNAS4 Kollmorgen
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The Kollmorgen S70302-PBNAS4 is part of the S700 Servo Drives series and operates with a voltage rating of 208 to 480 volts and an auxiliary supply voltage of 24 VDC. This drive measures 70 mm wide, 345 mm high, 243 mm deep, and weighs 4.4 kilograms. It features a dual channel STO capability and includes safety card S2-2 with SIL 2.
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Product Description:
The S70302-PBNAS4 is a servo drive produced by Kollmorgen within the S700 Servo Drives series. Designed for industrial automation, it regulates motor torque and speed by converting mains power into controlled three-phase output. This configuration uses standard PCBs, making it suitable for general-purpose cabinet installation. By communicating with upstream controllers and safety circuits, it delivers precise motion profiles for packaging lines, robotics, and material-handling systems.
The control section runs from an auxiliary logic source of 24 VDC, keeping parameters and bus communication active during main power loss. Its power stage accepts three-phase mains between 208...480 V. Under continuous load, the inverter supplies 3 Arms, and short bursts can reach 9 Arms during acceleration. An internal brake chopper directs regenerative energy into a resistor rated at 50 W, and the circuit limits current within the 2 A brake output. Dual-channel STO together with the plug-in S2-2 safety card provides hardware torque isolation at SIL 2. Two 9-pin SubD PROFIBUS ports allow daisy-chain wiring.
Physical integration is eased by a front width of 70 mm, a depth of 243 mm, and a height of 345 mm, so multiple axes can be lined up on a 300 mm mounting rail without exceeding standard panel clearances. The aluminum housing weighs 4.4 kg, which reduces handling effort during installation or service. For applications with high inertial loads, the drive supports an external braking module; a resistor value of 33 Ohm pairs with an external dissipation capacity of 1 kW, allowing controlled deceleration of large masses without overloading the internal chopper. Because the safety card occupies the dedicated expansion slot, the remaining fieldbus and I/O ports stay available for encoder feedback and fan monitoring.
