The D41D is a tamper-proof door switch that helps to prevent bypassing of safety solutions and keep workers safe thanks to its high-coded RFID technology, which makes it harder to defeat and ideal for hazardous application. The D41D offers three different actuator options with the ability to detect them from different positions adding flexibility to guard design and making it easier to meet installation requirements in tight areas. In addition, the D41D is designed to lower the cost of ownership by being easy to install with automatic paring for quick installation for one up to 31 switches, if connected in series, and its three-color led indicator is designed to simplify the programming process, as well as troubleshooting.