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9-26
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Diagrams
SCM Signal Definitions (Continued)
Signal
Definition
NPFW
Power fail warning (negative true).
NPOLL
110 bus interface poll (negative true).
NPSLED
PS LED on service panel (negative true).
NPSTLED
Power supply overtemperature (negative true).
NRESET
RESET switch on service panel (negative true).
NRUNLED
RUN LED on service panel (negative true).
NSCMLED
SCM LED on service panel (negative true).
NSELFf
Leading edge causes power supply to send stack into self-test (negative true).
NSELFfEST
SELF TEST switch on service panel (negative true).
NSELFfESTLED
SELF TEST LED on service panel (negative true).
NSTlLED
Stack 1 LED on service panel (negative true).
NST2LED
Stack 2 LED on service panel (negative true).
NST3LED
Stack 3 LED on service panel (negative true).
NST4LED
Stack 4 LED on service panel (negative true).
NSTSLED
Stack 5 LED on service panel (negative true).
NST6LED
Stack 6 LED on service panel (negative true).
NST7LED
Stack 7 LED on service panel (negative true).
NST8LED
Stack 8 LED on service panel (negative true).
NST9LED
Stack 9 LED on service panel (negative true).
NSTlOLED
Stack 10 LED on service panel (negative true).
NSTl1LED
Stack 11 LED on service panel (negative true).
NSTl2LED
Stack 12 LED on service panel (negative true).
NSTART
START switch on service panel (negative true)
NSTLED
Stack overtemperature (negative true).
NSTS
110 bus status (negative true).
NSYNC
110 bus interface poll (negative true).
NTEMPLED
TEMP LED on service panel (negative true).
NWAlT
liO bus lengthen 10SB (negative true)
PPON
Primary power on; all outputs in spec.
READ
110 bus data direction (high indicates data to lOP).
STl
Stack self-test from slot 1.
ST2
Stack self-test from slot 2.
ST3
Stack self-test from slot 3.
ST4
Stack self-test from slot 4.
STS
Stack self-test from slot S.
ST6
Stack self-test from slot 6.
ST7
Stack self-test from slot 7.
ST8
Stack self-test from slot 8.
ST9
Stack self-test from slot 9.
STlO
Stack self-test from slot 10.
STll
Stack self-test from slot 11.
STl2
Stack self-test from slot 12.
US4
POLL ANDed with NSELFf.
UPSI
Uninterruptible power supply.
UPS2
Uninterruptible power supply.
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