The ABB 2TLA020006R2300 JSHD4-3 is a top part of the three-position handheld device JSHD4, designed for enhanced safety and control. It features integrated LEDs for clear visibility and does not include any extra buttons, ensuring straightforward operation. This component is compatible with bottom parts AB, AD, AH, AJ, AK, and AL, providing flexibility in configuration. For added security, an anti-tamper option is available with all bottom parts except AK. Three-position devices like the JSHD4-3 are essential for allowing limited machine movement when an operator is in a hazardous area, such as during troubleshooting, test running, and programming, ensuring both safety and efficiency.