Chapter 2: Installation
2-13
OH/FF/PF/UID LED
NMI Button
Overheat (OH)/Fan Fail/Power Fail/
UID LED
Connect an LED Cable to the OH/Fan
Fail connection on pins 7 and 8 of JF1
to provide advanced warnings of chassis
overheat, Unit ID status, power or fan
failure. Refer to the table on the right
for pin definitions.
OH/Fan Fail Indicator Status
Color: State Definition
Off
Normal
Red: On, Steady
System Overheat
Red: On, Flashing (slow)
Fan Fail
Red: On, Flashing (fast)
Power Fail
Blue: On. Steady
Local UID On
Blue: On Flashing
Remote UID On
A
B
JF1 Header Pins
A
B
NMI Button
The non-maskable interrupt button
header is located on pins 19 and 20 of
JF1. Refer to the table on the right for
pin definitions.
NMI Button
Pin Definitions (JF1)
Pin# Definition
19
Signal
20
Ground
OH/Fan Fail LED
Pin Definitions (JF1)
Pin# Definition
7
Vcc
8
Ground
