3D Systems FIGURE 4 MODULAR User Manual page 27

Back of LED Light Stack
Mini-USB Port - Allows for micro-USB-to-USB
A
2.0/1.1 connection for light-stack programming.
Only 3D Systems Certified Service Personnel
should access this USB port. Charge/data-transfer
USB Male-USB (MicroB) male not included with
printer.
3D Systems, Inc. 23 p/n 42-D116, Rev. K