I had installed a key counter interface in my MP4000 machine. I want to use it to plug in an external controller (computer software via a I/O card). This card would be connected with a wire through a bd9 connector placed on a cover of the machine. To connect a key counter interface to my controller I need an info about what signals are on which pin in this key counter interface. I can't find such information in any documentation. Could anyone help me ? Thanks
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