This Secure interface is part of the Modicon M171/M172/M173 range, a control offer for HVAC/Pumping applications. This IIoT Secure interface plug-in is designed to establish a secure Internet connection and to connect unsafe devices to a secure Ethernet network. It runs on 24Vac 50/60 Hz or 20…38Vdc power supply and gets a double Ethernet port with switch capabilities. The Secure interface Plug-in allows M172 controller to secure connection via HTTPs to webserver, to secure email SMTPs, to secure file transport protocol FTPs. It is fit with an integrated TTL communication port, to communicate with the controller, and supplied with removable terminal blocks fbus connection. It figures a memory card slot (Micro SD), programmable LEDs (red, yellow, green) and power LED (green). Its size is 4 DIN. It measures 72mm wide, 60mm deep, 110mm high, and weighs 0.165kg. The Secure interface Plug-in allows M172 controller to secure connection via HTTPs to webserver, to secure email SMTPs, to secure file transport protocol FTPs. The Secure Interface Plug-in is certified CE, UL, CSA, EAC, RCM, UKCA. It is compatible with M172 controllers, and TM172AP12PM mounting accessory. It is sold in a 1-piece package. It mounts on 35mm DIN rail, or on panel with TM172AP12PM mounting accessory. Modicon M171/M172/M173 controllers are designed for complete automation solutions for HVAC and Pumping machines. Modicon M171/M172/M173 range is for OEMs and helps to maximize profitability or energy efficiency in HVAC applications.