Intel
©
LB440GX 2U Rack Server Chassis TPS Rev 1.0
5
output load, nominal input voltage, with line source interruptions not to exceed one period of the AC
input power frequency (i.e. 20 milliseconds at 50Hz).
The power supply is not damaged by AC surge ring wave up to 3.0kV/500A. This ring wave is a
100kHz damped oscillatory wave with a specified rise-time for the linear portion of the initial half-
cycle of 0.5
µ
sec. Additionally, the chassis will not be damaged by a unidirectional surge waveform of
up to 1.5kV/3000A, with a 1.2
µ
sec rise time and 50
µ
sec duration. Further details on these
waveforms can be obtained in ANSI/IEEE STD C62.45-1992.
3.4 Power Supply Connector Pin Assignments
3.4.1 P1 Main Power Connector
Housing: 24-pin Molex* 39-01-2240, Contact: Molex 39-00-0038
Pin Signal
18 AWG
Color
Pin Signal
18 AWG
Color
1
+3.3VDC
Orange
13
+3.3VDC Orange
2** +3.3VDC
+3.3V remote sense
Orange
Orange
14
-12VDC
Blue
3** COM
3.3V remote sense RTN
Black
Black
15
COM
Black
4
+5VDC
Red
16
PS_ON_L Green
5
COM
Black
17
COM
Black
6
+5VDC
Red
18
COM
Black
7
COM
Black
19
COM
Black
8
PWR OK
Gray
20
-5V
White
9
5VSB
Purple
21
+5VDC
Red
10
+12VDC
Yellow
22
+5VDC
Red
11
+12VDC
Yellow
23
+5VDC
Red
12
+3.3VDC
Orange
24
COM
Black
Table 3. 20+4-pin “Modified ATX” Power Supply Connector
§
Note**: The 3.3V power and 3.3V remote sense are double crimped into a single contact at
pin 2. The 3.3V remote sense return and COM are double crimped into a single contact at
pin 3.
§
The “Modified ATX” main power connector is configured as the standard ATX 20 (2x10) pin
connector plus a 2x2 (4) pinout designed to supply addi5VDC to the board. For
connecting this into the Intel
server board, use the 24-pin power connector on the
board.
