Operating Characteristics; Connector Pinout - Intergraph InterServe 8000 System Reference Manual

5. Any combination of +3.3 V, +5.1 V, or +12 V do not exceed their maximum power or 550 Watts
of total power.
6. This output is always on.

Operating Characteristics

The power supplies operate in the following manner.
u
Over-Current Protection is provided on +3.3 VDC and +5.1 VDC outputs. The Over-Current
Protection disables the DC outputs (except the +5.0 V) and keeps them disabled until AC is
cycled.
u
Over-Voltage Protection is provided on +3.3 VDC and +5.1 VDC. The Over-Voltage Protection
disables the DC outputs (except the +5.0 V) when the output reaches 5.5-6.8 VDC for +5.1 V DC
or 3.7-4.4 VDC for +3.3 VDC. The DC outputs remain disabled until AC is cycled.
u
Once the +5.1 V output is turned on by the power supply, it reaches its nominal output (see the
table above) within 750 ms at all line and load conditions.
u
The current is equally shared (within +10%) by the two power supplies at maximum load. If one
power supply fails, the remaining power supply takes over. +3.3 V, +5.1 V, +12 V, -5 V, and
-12V power outputs have series-connected blocking diodes to prevent an output fault in one power
supply from pulling down the outputs of the other power supply.
u
If one of the power supplies fails, the DC LED on the back of the power supply goes out, and the
power supply status LED changes from green to amber. Look at the back of the base unit to see
which power supply failed.
u
If a power supply is not supplying all of its DC voltage output levels correctly, an audible alarm
sounds.

Connector Pinout

The power supply has two connectors that attach to J18 and J19 on the power distribution board. Both
connectors have the same pinout, as follows.
Pin Name
1 AC Line
2 AC Ground
3 AC Neutral
4 No connect
5 No connect
6 No connect
7 +3.3 V
8 Ground
9 +3.3 V
10 +3.3 V
11 Ground
12 Fan 1 Tach
13 Fan 2 Tach
Pin Name
14 Ground
15 +3.3 V
16 Current Share +3.3 V
17 Current Share +5.1 V
18 Current Share +12 V
19 Current Share Return
20 AC OK
21 DC OK
22 Ground
23 -5 V
24 Ground
25 +5.0 V (always on)
Pin Signal
26 Ground
27 Remote ON/OFF
28 Ground
29 +12 V
30 +12 V
31 +12 V
32 +12 V
33 -12 V
34 Ground
35 Ground
36 +5.1 V
37 +5.1 V
77