E1701D Modular XY2/100 Scanner Controller
Secondary Head Extension Board gives possibility to connect an additional scanhead which then works fully parallel to the primary one connected to the baseboard and makes use of the same laser:
XY2-100/XY3-100 interface for an additional scanhead marking parallel to head of baseboard
Up to three of these extensions can be used with one E1701D baseboard to connect up to four scanheads