Applied Robotics 94501-C1051A Robot Controller

94501-C1051A is a QS-400NP-T3 QuickSTOP collision-breakaway sensor from Applied Robotics, listed under the QS-400NP-T3 designation and described as "SENSOR, QUICKSTOP COLLISION BREAK-AWAY." The unit corresponds to the QS-400NP-T3 model in the QuickSTOP line and weighs 5.29 lb, indicating a compact yet sturdy sensor module designed for mounting within robotic cells. As a collision-breakaway sensor, its function is to detect an unintended contact or impedance change and participate in a rapid-stop sequence, typically used with QS-series hardware to protect tooling, safety enclosures, and workers in industrial automation. Common applications include safeguarding articulated or Cartesian robots in manufacturing or assembly cells where a quick halt is required upon collision. Since this item is a sensor component rather than a drive controller, it forms part of a broader safety system rather than serving as the robot’s main controller. When selecting 94501-C1051A, verify compatibility with Applied Robotics QuickSTOP safety infrastructure (QS-40/QS-400NP-T3 family) and ensure correct installation and electrical interfacing per system specifications. The part appears in multiple distributor listings under the QS-400NP-T3 family, confirming its identity as a QuickSTOP collision sensor rather than a standalone controller.