The Kollmorgen AHD70E4-44S is a high-performance servo drive, a critical component in motion control systems that bridges the gap between control software and motor hardware. As part of Kollmorgen’s AHD series, it’s designed to integrate seamlessly with the company’s line of servo motors, forming a cohesive system that delivers precise motion control across a range of industrial applications.
Model AHD70E4-44S
Brand Kollmorgen
Type Servo Drive
Power Supply 3-phase AC 400-480 V
Continuous Output Current 70 A
Peak Output Current 210 A (3x overload for 3 seconds)
Control Mode Position, velocity, torque
Communication Interfaces EtherCAT, PROFINET, Modbus TCP
Feedback Support Hiperface ®, EnDat ®, resolver, incremental encoders
Safety Features STO (SIL 3), SS1 (SIL 2)
Dimensions (W x H x D) 180 mm x 260 mm x 150 mm
Weight 4.2 kg
Operating Temperature 0°C to 55°C (ambient)
Protection Rating IP20 (panel-mounted)
Cooling Convection with optional heat sink
The Kollmorgen AHD70E4-44S is a high-performance servo drive, a critical component in motion control systems that bridges the gap between control software and motor hardware. As part of Kollmorgen’s AHD series, it’s designed to integrate seamlessly with the company’s line of servo motors, forming a cohesive system that delivers precise motion control across a range of industrial applications.
AHD70E4-44S
In the architecture of a control system, the Kollmorgen AHD70E4-44S acts as the command center for connected motors, translating digital control signals into the precise voltage and current outputs needed to achieve desired speeds, positions, and torques. It fits into both standalone systems and networked setups, communicating with PLCs, HMIs, and other automation components via industry-standard protocols. For engineers and integrators, its value lies in its versatility—whether deployed in a single-axis application or a complex multi-axis system, the KollmorgenAHD70E4-44Sprovides consistent, reliable performance that simplifies system design and reduces integration time. Its compact form factor also makes it ideal for space-constrained enclosures, a common challenge in modern industrial setups.
AHD70E4-44S
Main features and advantages:
The Kollmorgen AHD70E4-44S stands out for its exceptional dynamic response, a feature that sets it apart in high-speed applications. When paired with Kollmorgen servo motors, it can accelerate and decelerate loads with remarkable precision, reducing overshoot and settling times by up to 40% compared to standard drives. This translates to faster cycle times in manufacturing processes, directly boosting productivity.
Hardware-wise, the drive’s rugged design is built to withstand the rigors of industrial environments. Its conformal-coated circuit boards resist dust, moisture, and chemical exposure, making it suitable for use in washdown areas common in food and beverage plants. The Kollmorgen AHD70E4-44S also offers advanced thermal management, with a fanless design that eliminates moving parts, reducing the risk of failure and extending service life.
Compatibility is another key strength. It supports multiple feedback protocols, including Hiperface® and EnDat®, allowing it to work seamlessly with a wide range of servo motors, not just Kollmorgen’s own models. This flexibility simplifies retrofits, enabling engineers to upgrade existing systems without replacing entire motor assemblies. Additionally, its built-in safety features—such as safe torque off (STO) and safe stop 1 (SS1)—ensure compliance with global safety standards, protecting both equipment and personnel.
AHD70E4-44S
Technical specifications:
Model AHD70E4-44S
Brand Kollmorgen
Type Servo Drive
Power Supply 3-phase AC 400-480 V
Continuous Output Current 70 A
Peak Output Current 210 A (3x overload for 3 seconds)
Control Mode Position, velocity, torque
Communication Interfaces EtherCAT, PROFINET, Modbus TCP
Feedback Support Hiperface ®, EnDat ®, resolver, incremental encoders
Safety Features STO (SIL 3), SS1 (SIL 2)
Dimensions (W x H x D) 180 mm x 260 mm x 150 mm
Weight 4.2 kg
Operating Temperature 0°C to 55°C (ambient)
Protection Rating IP20 (panel-mounted)
Cooling Convection with optional heat sink
In the high-stakes world of industrial automation, where precision and efficiency define operational success, the Kollmorgen AHD70E4-44S has carved out a critical role across diverse sectors. Picture a large-scale automotive assembly plant, where robotic arms must weld, paint, and assemble components with millimeter-perfect accuracy—this is where the Kollmorgen AHD70E4-44S excels. Its ability to deliver smooth, synchronized motion ensures that each robotic joint moves in harmony, reducing cycle times and minimizing errors in high-volume production lines.
In the realm of packaging machinery, where speed and consistency are paramount, the Kollmorgen AHD70E4-44S powers conveyor systems and filling equipment, maintaining precise speeds even as product weights and sizes vary. It’s equally at home in material handling facilities, driving automated guided vehicles (AGVs) that navigate tight warehouse aisles with pinpoint accuracy, avoiding collisions and optimizing logistics workflows. Used in industrial automation setups ranging from semiconductor fabrication to food processing, this drive module thrives in environments where reliable, high-performance motion control is non-negotiable. Whether managing the delicate movements of a pharmaceutical labeling machine or the heavy lifting of a metal stamping press, the Kollmorgen AHD70E4-44S delivers the control engineers need to keep operations running at peak efficiency.
Related products:
Kollmorgen AHD50E4-44S – Lower current variant (50 A continuous) for lighter-load applications in the same AHD series.
Kollmorgen AKM42C-ANCNR-00 – Servo motor optimized for use with the Kollmorgen AHD70E4-44S in medium-torque applications.
Kollmorgen S700-300 – Complementary motion controller that synchronizes multiple Kollmorgen AHD70E4-44S drives in complex systems.
Kollmorgen H100-070-3PH – Power supply unit designed to pair with the Kollmorgen AHD70E4-44S for stable voltage delivery.
Kollmorgen EKM21-01 – EtherCAT communication module that extends the drive’s network capabilities.
Kollmorgen MMC01-01 – Memory module for storing drive configurations, simplifying replacement of the Kollmorgen AHD70E4-44S.
Kollmorgen CAB-HDSL-5M – Hiperface DSL® cable for single-cable connectivity between the drive and compatible motors.
Kollmorgen AHD100E4-44S – Higher current model (100 A continuous) for heavy-duty applications requiring the same feature set.
Installation and maintenance:
Before installing the Kollmorgen AHD70E4-44S, verify that the mounting panel can support its weight and dissipate heat effectively—allow at least 100 mm of clearance above and below to ensure proper airflow. Check that the 3-phase power supply is properly grounded and protected by a 100 A circuit breaker to prevent damage from voltage spikes. For networked setups, confirm that EtherCAT or PROFINET cabling is shielded and routed away from high-voltage lines to minimize electromagnetic interference.
For maintenance, schedule quarterly checks of terminal connections to ensure they remain tight, especially in high-vibration environments. Use Kollmorgen’s WorkBench software to run diagnostic scans monthly, which can detect early signs of issues like encoder signal degradation or cooling system inefficiencies. The drive’s firmware should be updated annually during planned shutdowns, as updates often include performance enhancements and expanded compatibility with newer motor models. The Kollmorgen AHD70E4-44S is designed for minimal maintenance, but monitoring heat sink temperatures during peak operation (aim to keep them below 60°C) will help extend its service life.
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