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storage is also used to store data in the event of communication loss with the Station-
Master computer.
• Fuse and Pushbutton Descriptions:
o F1 and F2:
Field contact voltage applied to the Event Power connector passes through these 1.25A
SB fuses and is then routed to the event power connector J18. A cable connects the field
contact voltage to the digital input boards (see Section 1.1.5).
o F4:
Input power supply voltage applied to the Input Power connector passes through this 3A
SB fuse.
o PB1:
This is a reset button for the CPU board and is used only for troubleshooting.
• Jumper Descriptions:
These jumpers are described below:
o JP1 – ENABLE LOW SECTOR PROGRAMMING: This jumper must be ON to allow the
embedded Linux File System to be loaded into the CPU board flash memory. This jumper
does not need to be ON after the file system is loaded, but is left so file system updates
can be installed later.
o JP2 – LOW SECTOR BOOT: This jumper must be OFF for normal operation. Do not install
a jumper unless instructed to do so by USI personnel.
o JP3 – DISABLE WATCH-DOG: This jumper must be OFF for normal operation. Do not
install a jumper unless instructed to do so by USI personnel.
o JP4 – EEPROM WR: This jumper must be OFF for normal operation. Do not install a
jumper unless instructed to do so by USI personnel.
• LED Indicators:
These indicators are described below:
o D12:
This LED indicates that the power switch is in the ON position and the fuse is good.
o D15 – D20:
These six LEDs indicate the presence of the power supply output voltages. Shown from
left-to-right in the figure above these LEDs indicate 1.2V, 1.5V, 1.8V, 5.0V, 2.5V, and 3.3V
respectively. These voltages provide power for the entire M9000 module. These LEDs are
different colors intentionally to aid in differentiating between them. The color is no
indication of normal or abnormal voltage. If the LEDs are illuminated, the voltage is normal.
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