The expander pushbutton module gives the possibility of connecting call pushbuttons to the SFERA speaker modules.

• Each module can manage up to 8 call pushbuttons
• Connect up to a maximum of 96 call pushbuttons for each entrance panel
• Power supply from SCS BUS: 18 – 27 Vdc
• Max operating absorption: 1.5mA
• Stand by absorption: 1.5mA
• Operating temperature: (-25) - (+70)°C