The green one has 3 states:
dark: (after initialization phase) error state,
blinking: communication in progress - normal state
on(just lighting): OK - normal state
2.1.8. Opto-boards for stepper motors
There are five stepper motors in the system: Horizontal and Vertical motors, which make the
movements of the sampling needle; the main Dilutor motors (2), which move the syringes
and the micro Dilutor motor, which drives the sampling phase. The stepper motor opto
boards make the connections between the motor driver ICs and motors, and have opto
optos is indicated by two LEDs on each stepper motor opto boards.
Dilutor and Micro-dilutor have its own separated opto-board, located directly in the units.
Horizontal and Vertical motors have a common Opto-board, called XYopto Board:
The other side of the board contains a ribbon cable connection to the COMB.
2.1.9. Valve boards
There are two kinds of valve boards: Valve board 0-5 and Valve board 6-12.
The valve boards are connected to controller and driver chips are located on the PPB.
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