... A2 elevator control mainboard elevator control mainboard,control panel,control panel,mainboard,panel. elevator control mainboard(elevator),elevator spare part ... Hitachi SH-2 series 32 bits microprocessor2.Four-layer panel SMT(surface mounted technology) craftsmanship3.Top-class integration ... .Control modes:full collective selection,2 sets parallel,3-8 sets group control2.Communication mode/ full serial ...