Spectrum Digital AppBox D21, Руководство пользователя

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AppBox D21 System User’s Guide 22
AppBox
3.3 Switches
The table below describes the switches on the AppBox D21 CPU Board.
SWITCH NAME
TYPE OF
SWITCH
FUNCTION
FACTORY DEFAULT
POSITION
SW1
Pushbutton
switch
PA15_GPIO Open
SW2, position 1, on Rocker switch
Connects RS485A to
RS485B
RS485 terminator on
X
SW2, position 1, off Rocker switch
Disconnects RS485A from
RS485B
RS485 terminator off
SW2, position 2 Rocker switch Not used
SW2, position 3 Rocker switch Not used
SW2, position 4, on Rocker switch
Connects
PB31_RS485_EN to
RS485_ECHO,
RS485 echo
SW2, position 4, off Rocker switch
Disconnects
PB31_RS485_EN to
RS485_ECHO,
No RS485 echo
X
The figure below shows the switch, SW2, in the “Factory Default Position”. Switch position 1 is in the “ON”
position (slide moved to the right). Switch positions 2, 3, and 4 are in the “OFF” position (slide moved to the
left). Positions 2 and 3 are not used on the D31 APP Board.
Switch SW2
ON Position OFF Position