Pin connections

[ieatlint]

Hi, I've just received my LK204-25-PC and have a couple questions. My pin connections dont look quite the same as they do in the diagram with the manual. So I got 2 things i want to run by ya:
note that when I refer to the top, I'm holding the LCD and when looking at the back, the matrix orbital and model number are right side up, and the rs-232 connector is at the bottom

First off, the GPO outputs on the right, 2 columns, 13 rows, 26 pins. OK, isnt there only supposed to be 16 pins (8 GPO's), and if so, which ones are the GPOs and which ones are NC (or if not NC, what do they do?). Also, which pin is positive current and negative current (I assume left pin positive, right negative, is that correct)?

Second, Just below the rs-232 connector is 10 pins. What do they do?

Thanks

[Henry]

Welcome to the forums...

The pins bellow the DB-9 connector are the keypad pins, this unit can have up to a 25 key keypad connected to it.

The GPOs start at the bottom, and go up.

88
77
66
55
44
33
22
11
----------
bottom

Don