Siemens POL687.70/STD

The Siemens POL687.70/STD is a versatile HVAC controller designed to handle a broad range of automation tasks efficiently. This MicroTech programmable controller features 27 inputs and outputs, including temperature sensor inputs (NTC), universal inputs/outputs (UIO), digital inputs (DI), both standard and isolated, as well as digital outputs (DO) and triac outputs for HMI integration. It supports power supply options of 24 VAC or DC and offers multiple communication protocols such as Ethernet, RS485, KNX, and Modbus, enabling seamless connectivity in complex systems. Additional capabilities include JSON support, PL-LINK interface, and expandability through SD card and USB ports. Distributed by BSP Automation, this controller is well-suited for modern HVAC applications requiring reliable control and flexible communication options.