Table of Contents
Pin Assignments for the DC Power Connectors
The power-supply output voltages can be measured at the back (wire side) of
the connectors without disconnecting them. Figures 1-6 through 1-8 show the
wire side of the connectors.
open
common (black)
common (black)
common (black)
1
PSON#
(grey)
P1
+5 VDC (red)
common (black)
+5 VDC (red)
common (black)
3
PWRGOOD
(orange)
1
Pin 11 — PSON# should measure between +4 and +5 VDC except when the power button
on the front panel is pressed, taking PSON# to its active-low state.
2
Pin 19 — Thermal fan-speed control (TFSC) is a power-supply input signal used to control
the power-supply fan speed.
3
Pin 5 — PWRGOOD should measure between +4 and +5 VDC when the power supply is
on to indicate that all power-supply output voltages are within the ranges specified in
Table 1-1.
Figure 1-6. DC Power Connector P1
1
2
Figure 1-7. DC Power Connector P2
11
12 13 14 15 16 17
1
2
3
4
5
6
7
P2
3
4
5
6
+3.3 VDC (blue/white)
+3.3 VDC (blue/white)
+3.3 VDC (blue/white)
common (black)
common (black)
common (black)
+5 VDC (red)
+5 VDC (red)
+5 VDC (red)
2
TFSC
(brown)
+5 VDC (red)
18 19 20
8
9
10
common (black)
common (black)
–12 VDC (blue)
+12 VDC (yellow)
+5 VFP (purple)
System Overview
1-7
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