Power Supply Connector Pin Assignments; P1 Main Power Connector; 20+4- Pin "Modified Atx" Power Supply Connector - Intel SLWBR - Server Platform - LB440GX 2U Technical Specifications

©
Intel LB440GX 2U Rack Server Chassis TPS Rev 1.0
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 sec. Additionally, the chassis will not be damaged by a unidirectional surge waveform of
up to 1.5kV/3000A, with a 1.2 sec rise time and 50 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
1
2**
3**
4
5
6
7
8
9
10
11
12
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 additional +5VDC to the board. For
connecting this into the Intel L440GX+ server board, use the 24-pin power connector on the
board.
Signal 18 AWG
Color
+3.3VDC Orange
+3.3VDC Orange
+3.3V remote sense Orange
COM Black
3.3V remote sense RTN
Black
+5VDC Red
COM Black
+5VDC Red
COM Black
PWR OK Gray
5VSB Purple
+12VDC Yellow
+12VDC Yellow
+3.3VDC Orange
Table 3. 20+4-pin "Modified ATX" Power Supply Connector
Pin Signal 18 AWG
Color
13 +3.3VDC Orange
14 -12VDC Blue
15 COM Black
16 PS_ON_L Green
17 COM Black
18 COM Black
19 COM Black
20 -5V White
21 +5VDC Red
22 +5VDC Red
23 +5VDC Red
24 COM Black
5