Nexo NUAR - Manual (Page 63)

MENU DESCRIPTION
This menu allows choosing the way the GPIO are handled by the NXAMP Powered
TDcontroller. There are currently 5 modes of GPIO which are described bellow.
To change the current GPIO mode, press Edit (‘Select 4’ button) and turn the wheel up or
down to the selected GPIO mode. Once done, press OK (‘Select 4’ button) to validate your
choice.
GPIO is set to MODE 0 GPIO
Edit
To put a GPI pin in the ‘High’ state, connect it to one of the ‘+5 Volts’ output on the GPIO
DB-25 connector. See above in the user manual for proper pin-out. When nothing is
connected to a GPI, the state is ‘Low’ (internal pull-down). A switch can be directly
connected to this input, but if a GPIO output of another device should be connected, it is
mandatory to ensure a galvanic insulation between the two devices. Only direct connection
is authorized between NXAMP when they are located in the same rack.
GPIO mode 0 (Default mode / DMU mode)
In this default mode the GPIO port can be used with a NEXO DMU unit. See further in this
manual for more details about DMU set up.
GPIO mode 1 (Basic remote control mode)
This mode is intended to be used with permanently ‘High’ or ‘Low’ state signals. There is an
action depending on the state of each GPI. A state is validated when the state of the pin
has changed and is stable for 1 second. Here is the detail:
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