Input Simplified Functional Block Diagram; Selection Jumper Pull-Up Or Pull-Down - CNC4PC C11G User Manual

7.3

Input simplified functional block diagram

Simplified functional block diagram for the inputs
7.4

Selection Jumper PULL-UP or PULL-DOWN

Pins 10,11,12,13 and 15 can be set to pull-up or pull-down by selecting the jumper in the
appropriate position.
The input pins can be set to be pulled up or down with a 4.7Kohm resistor.
1-2: PULL-UP
Pull up/down resistors determine the normal status of a pin when left in the air (not
wired or circuit open). If active high it sends a high to the controller and it requires a low
or ground or 0vdc to make it change states. If active low, then it sends a low to the
controller and it requires +5vdc from the board to make it change state.
User's Manual
2-3: PULL- DOWN
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