Kollmorgen / Pacific Scientific 121-236 Motor Controller Power Unit

The Kollmorgen/Pacific Scientific 121-236 is an SC750 series motor controller power unit engineered for industrial automation systems demanding precise, drift-free servo motor control. This digital position controller integrates resolver feedback with full digital motion control capabilities, delivering stable performance in rugged manufacturing environments.

Technical Specifications

Input Power: 230 VAC, 3-Phase, 50/60 Hz

Current Rating: 30 A continuous, 60 A peak, 29 A FLA

Feedback: Rugged single resolver feedback

Function Code: Position controller with resolver (Function 5)

Motor Compatibility: Brushless servo motors rated 4.8 lb-in to 451 lb-in continuous torque; 10 lb-in to 800 lb-in peak torque

Weight: Approximately 45 lbs

Packed Dimensions: 20" × 20" × 20" (estimated)

Key Features

Full digital control with resolver feedback eliminates drift across industrial temperature and vibration environments

Total front access design streamlines installation and field maintenance

Single resolver input provides rugged, proven feedback topology for demanding applications

Digital precision motion control paired with analog-equivalent reliability

Supports broad torque range via Pacific Scientific brushless servo motor integration

Typical Applications Positioning and motion control in factory automation, machine tools, material handling, and process equipment where resolver-based feedback and 3-phase power availability are standard.

Compatibility & Integration Designed for operation with Pacific Scientific brushless servo motors within the SC750 platform. The 121-236 accepts resolver feedback and drives motors across the full torque range of the Pacific Scientific brushless servo line. Integration with broader automation networks depends on external interface architecture and communication modules not detailed within this unit's specification set.