Siemens 6ES7 235-0KD22-0XA0 Analog Input Module

Siemens 6ES7 235-0KD22-0XA0 is the EM235 analog I/O extension module for SIMATIC S7-200 systems, delivering four analog input channels and one analog output channel in a compact EM235 form factor. Each of the four AI inputs is 12‑bit and designed for DC signals, with a stated signal range of ±10 V DC to enable accurate measurement of bipolar sensor outputs and conditioned signals. The unit includes a single AO channel for voltage output, aligning with the 0KD22 specification code that identifies four AI and one AO path. As an EM235 module, it is intended to expand the analog sensing and control capabilities of S7‑200 CPUs, enabling integration of analog sensors and actuators into automation projects that require reliable voltage measurements and straightforward analog control loops.