Meilhaus Electronic ME-1400, Электронное руководство

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Depending on how the resistor arrays are placed on the board, the
pull-up or pull-down state is selected. For pull-up, the end pin of
the array must go to the “+”-pin and for pull-down, the end pin
must go to the “-“-pin (see diagram 8 to 13).
Note:
Make sure to ground yourself before inserting the arrays to avoid a
static discharge