B8961 Kollmorgen
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The Kollmorgen B8961 is part of the B8000 Brushless Servo Smart Drives series and offers a continuous output current of 5 Amps with a peak output current of 10 Amps. This drive supports 8 programmable inputs and outputs and operates with a system resolution of 8000 counts per revolution. Its apparent power is 1150 VA at 115 Vac and 2300 VA at 230 Vac.
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Product Description:
The B8961 brushless servo smart drive is produced by Kollmorgen and belongs to the B8000 Brushless Servo Smart Drives series. Intended for compact motion stations, the drive converts line power into controlled three-phase excitation for brushless servomotors while monitoring encoder feedback in real time. By closing the torque and velocity loops inside the drive, it reduces PLC load and shortens response times in pick-and-place, packaging, and electronic assembly equipment. Because encoder signals are processed locally, the drive can correct speed changes quickly during rapid starts, stops, and load variations. Integrated user-configurable I/O lets the device handle simple interlocks without external relays.
Its analog command path offers 12-bit resolution and a bandwidth of 62.5 Hz, allowing stable following of low-frequency position or speed references. The power stage can deliver a continuous output of 5 A and withstand bursts up to 10 A, so short acceleration peaks do not saturate the drive. When operated from a 115 VAC source, the apparent power draw is 1150 VA; at 230 VAC, the figure rises to 2300 VA because of the higher bus voltage. An internal encoder supply rated at 5 VDC and 200 mA powers incremental or commutation feedback devices. Eight programmable outputs, each limited to 100 mA, provide status or motion-complete signals to downstream logic. This arrangement supports basic signal exchange with external control hardware while keeping the motion loops inside the drive.
The rear-mounted heat sink triggers a shutdown at 55 °C, protecting the output devices from excess temperature. The housing is 5.84 in deep and 3.73 in wide, and the overall height is 10.50 in (266.7 mm), which allows installation in standard 11-inch racks. The narrow enclosure also leaves room for adjacent modules and terminal wiring in compact control panels. Motion resolution is based on an internal position counter of 8000 counts/rev, and the control logic can react to transitions from 8 programmable inputs for limit switches, homing signals, or quick-stop commands. These input-driven functions support axis sequencing without requiring separate interface hardware for every machine event.
Frequently Asked Questions about B8961:
Q: What is the continuous output current rating of the B8961 drive?
A: The B8961 can deliver a continuous output current of 5 A for consistent drive performance.
Q: What is the analog opto resolution of the B8961 servo drive?
A: This model features an analog opto resolution of 12 bits for precise control signals.
Q: What are the apparent power ratings for the B8961 at 115 Vac and 230 Vac?
A: The B8961 provides apparent power of 1150 VA at 115 Vac and 2300 VA at 230 Vac.
Q: How many programmable inputs and outputs does the B8961 offer?
A: Eight programmable inputs and eight programmable outputs are available on this unit.
Q: At what temperature does the B8961 heatsink trigger a shutdown?
A: The heatsink shutdown temperature for this model is set at 55 °C, ensuring thermal protection.
