D-6
Motherboard
Pinout
Data
Signal
Definition
SAC +
25
KHz
ac sine wave from power supply.
SAC-
25
KHz
ac sine wave from power supply.
SECGND
Ground on power supply secondary board.
SIGGND Ground for logic on supervisor board.
SPARE Spare line; no connection.
ST1 Processor stack self-test from slot
1.
ST2 Processor stack self-test from slot
2.
ST3
Processor stack self-test from slot 3.
ST4 Processor stack self-test from slot 4.
ST5
Processor stack self-test from slot 5.
ST6 Processor stack self-test from slot
6.
ST7
Processor stack self-test from slot
7.
ST8 Processor stack self-test from slot 8.
ST9
Processor stack self-test from slot
9.
ST10
Processor stack self-test from slot 10.
ST11 Processor stack self-test from slot 11.
ST12 Processor stack self-test from slot 12.
STACKTEMP
Processor stack temperature indicator.
TEST81A
Test point.
TEST81S Test point.
TEST81C Test point.
TEST83A Test point.
TON
5 volts from lOP.
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