SIPLUS CMS1200 SM1281 Condition monitoring for SIMATIC S7-1200 4 IEPE vibration channels 1 digital input for rotational speed acquisition SIMATIC S7-1200 Basic Controller - Flexible thanks to wide variety of communication options The SM 1281 condition-monitoring module, as an extension to the SIMATIC S7-1200, is used for the condition monitoring of motors, generators, pumps, fans, centrifuges and compressors, for example. This allows mechanical damage to be detected at an early stage, enabling scheduled maintenance to be carried out instead of a spontaneous repair.