SIMATIC S7-1200, analog output, SM 1232, 2 AO, +/-10V, 14 bit resolution, or 0-20mA/4-20mA, 13 bit resolution SIMATIC S7-1200 Basic Controller - flexible thanks to a wide range of communication options. With signal modules, you can adapt the configuration of your SIMATIC S7-1200 (except CPU 1211C) to suit your individual requirements. A range of digital and analog input, output and mixed modules is available for this purpose, including fail-safe versions. This fine-grained design option saves you space in the control cabinet and optimizes your hardware costs.