Siemens POL955.00/STD STD AHU EXT. I/O MODULE ISiemens POL955. 00 STD The Siemens POL955. 00 STD is a reliable and efficient STD AHU EXT. I O MODULE I designed for industrial and automation applications. This commercial grade product offers advanced features to enhance the performance of your automated systems. With its robust construction, it ensures durability even in demanding environments. The POL955. 00 STD module provides seamless integration with air handling units (AHUs), enabling precise