PSR4/5A-112-0400 Kollmorgen
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The Kollmorgen PSR4/5A-112-0400 is a power supply with regen, designed for BDS and ACS systems and part of the PSR Servo Power Supplies series. It operates on a 1 phase 115 VAC input with a current rating of 12 Amps per phase and provides an output power of 1.0 kW. The unit features standard internal 40 W regeneration and has maximum dimensions of 356 mm in height, 140 mm in width, and 285 mm in depth.
Internal Product Review
The PSR4/5A-112-0400 is a Kollmorgen servo power supply with regen for BDS and ACS systems, rated for 1.0 kW output. Single-phase 115 VAC input supports straightforward integration in smaller motion systems. Standard internal 40 W regen is a strong design advantage for controlled energy dissipation, making the unit a very capable power supply.
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Product Description:
The PSR4/5A-112-0400 is a regulated power module produced by Kollmorgen within the PSR Servo Power Supplies series. As a power supply with regeneration capability for BDS and ACS motion systems, it converts single-phase mains energy into the DC bus voltage required by compatible servo amplifiers. The module also absorbs surplus kinetic energy during controlled motor deceleration. In automated machinery, this unit forms the electrical backbone that keeps axis drives energized while preventing an overvoltage condition when loads brake. Its regulated output helps maintain a stable shared bus as connected axes accelerate, operate under load, and return energy during deceleration.
This supply is designed for a utility line of 115 VAC and uses a single-phase input arrangement. Under rated conditions, it can accept up to 12 amps per phase, which is the maximum continuous current that the installation wiring must carry. Internally, the converter delivers 1.0 kW of usable output power to the shared DC bus, supporting multiple medium-power servomotors. To manage regenerated energy, it includes a standard internal 40 W regeneration circuit that activates automatically when the bus voltage rises. This circuit reduces the need for external braking resistors and simplifies the panel layout. The regeneration function also helps control voltage increases caused by the mechanical energy returned from decelerating motors.
The regenerative path uses a 7.5 ohm shunt resistor, which limits peak dissipation without overstressing the supply. Heat generated by conversion losses is limited to 60 W, so cabinet ventilation must accommodate that thermal load. A soft-start charger fills the bus capacitors in 0.25 seconds, minimizing inrush current during power-up. The housing has a maximum depth of 285 mm, while its height and width are 356 mm and 140 mm, respectively. These dimensions allow the unit to mount beside standard servo drives on 300 mm DIN backplates without exceeding the enclosure depth. Appropriate spacing around the housing supports airflow and provides access to the module’s power connections during installation and routine service.
