Siemens FDCIO221, S54312-F2-A1 Input/output module (1 input and 1 output) For the connection of 1 circuit of potential-free, make-or-break contact for the indication of technical states (e.g
Siemens OH720 Multi-sensor smoke detector, S54310-F2-A1 For the detection of flaming fires caused by the combustion of liquid and solid matters, as well as smoldering fires. For reliab