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Operating Basics
GPIO connector
signal pinouts
22
The following table lists the signals and their function for each pin on the GPIO
connector.
Table 7: GPIO connector signal pinouts
Pin
Signal
1
State – Primary Backup
2
Primary fault
3
Backup fault
4
State – Manual Auto
5
GND
6
Power fault
7
Manual mode
8
Auto mode
9
Fault reset
10
Configurable fault
11
GND
12
13
Primary select
14
Backup select
15
ECO8000 Series Automatic Changeover Unit User Manual
Function
Output – high if Primary is selected, low
if Backup is selected
Output – goes low if a Primary fault is
present
Output – goes low if a Backup fault is
present
Output – high if Manual mode is
selected, low if Auto mode is selected
Ground
Output – goes low if a fault is preset in
the power subsystem as indicated by
the AC or DC LEDs on the supplies
Input – drive this pin low to assert
Manual mode (10 KΩ pullup resistor)
Input – drive this pin low to assert Auto
mode (10 KΩ pullup resistor)
Input – drive this pin low to assert a
fault reset (10 KΩ pullup resistor)
Output – goes low if any fault selected
in the GPI EVENTS menu are present;
also goes low during any watchdog
reboot
Ground
Not used
Input – drive this pin low to select the
Primary source (10 KΩ pullup resistor)
Input – drive this pin low to select the
Backup source (10 KΩ pullup resistor)
Not used
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