Siemens digital output module sm 1222 series siemens 6es7222 1bh32 0xb0 the siemens 6es7222 1bh32 0xb0 is a sm1222 digital output module that converts the internal signal level of the simatic s7 1200 into the external signal level required by the process the signal module can be mixed as desired and the user can adapt their controller exactly to the relevant task if the task is expanded subsequently the controller can be upgraded updating of the user program is extremely simple siemens