Siemens 6ES7-235-0KD00-0XA0 Digital Input Module

The Siemens EM235 6ES7-235-0KD00-0XA0 Analog I/O Module adds three analog input channels and one analog output to compatible S7-200 family controllers, expanding the system’s ability to read sensor signals and generate analog control signals without replacing the main CPU. As an expansion module designed specifically for S7-21x CPUs, the EM235 plugs into the controller’s expansion slot, enabling direct interfacing to voltage or current signals from process sensors and actuators while preserving the existing programming and wiring topology. The unit comprises three analog inputs and a single analog output, supporting typical Siemens signaling conventions used in many legacy automation setups, and it is marketed as EM235 with the 6ES7-235-0KD00-0XA0 order number. Common applications include reading analog process variables such as temperature or pressure sensors and providing analog drive to actuators like control valves, offering a compact solution for small automation panels that require additional resolution and input/output channels.