... ) or 2-8floors (single collective),can add 2pcs extension board for more floors.·Suitable for elevator of single speed, 2 ... speed, or hydraulic type, with reserve for VVVF updating.·main board self-powered (AC11V or DC12V) and peripheral power supply ( ... traction machine, winch, hydraulic lifting platform.·suitable for auto door, manual door. ·Bistable switch with magnet control is used for deceleration ...