K2921-1 - Lincoln Electric Power Wave STT Module for S-Series and R-Series Welders

Advanced Process Control for Precision Welding

The Lincoln Electric K2921-1 Power Wave STT Module is a critical upgrade for fabricators seeking to leverage the full potential of Lincoln's 3rd Generation Power Wave platform. Designed specifically to interface with the Power Wave S350, S500, and R-series power sources, this module unlocks proprietary advanced welding waveforms that are essential for critical applications. Most notably, it enables Surface Tension Transfer (STT), a controlled short-circuit transfer process that decouples wire feed speed from current to drastically reduce spatter and smoke while providing exceptional control over the weld puddle.

Beyond STT, the K2921-1 module also facilitates Rapid X and Low Fume Pulse modes. Rapid X utilizes a short arc length with high travel speeds, making it ideal for thin-gauge stainless steel and automated applications where heat input must be minimized to prevent distortion. Low Fume Pulse is engineered to reduce particulate generation at the source, improving the working environment for operators. The module connects seamlessly via ArcLink, Lincoln's digital communication protocol, ensuring that the power source and the module act as a single, unified system with millisecond-level response times.

Integration is straightforward and robust. The module is designed to mount securely to the power source or can be positioned remotely depending on the cell configuration. It draws its 40V DC control power directly from the host machine, eliminating the need for auxiliary power cables. This unit is the CE version, ensuring compliance with European safety, health, and environmental protection requirements, making it suitable for global manufacturing environments. Please note that this module is specifically engineered for the S and R series and is not compatible with the Power Wave S700.