1

fan connector

2

processor socket (CPU)

3

memory module connectors

 

 

(FAN_CPU1)

 

 

 

(DIMM_1, DIMM_2, DIMM_3,

 

 

 

 

 

 

DIMM_4)

 

 

 

 

 

 

 

 

4

power connector

5

serial ATA drive

6

serial ATA drive connectors

 

 

(PW_12V_A1)

 

connectors (SATA2,

 

(SATA0, SATA1)

 

 

 

 

SATA3)

 

 

 

7

front-panel

8

power connector

9

line-in, line-out, microphone, side

 

 

connector

 

(POWER1)

 

surround, center, and LFE

 

 

(FRONTPANEL)

 

 

 

connectors (AUDIO_6_STACK)

 

 

 

 

 

 

 

 

10

USB connectors (2)

11

network connector and

12

real-time clock reset jumper

 

 

(USB2_BACK1)

 

USB connectors (2)

 

(RTCRST)

 

 

 

 

(NIC_USB1)

 

 

 

 

 

 

 

 

 

 

13

video connector

14

battery socket (BT1)

15

Internal USB connector (USB1)

 

 

(VIDEO1)

 

 

 

 

 

 

 

 

 

 

 

 

16

PCI Express x16

17

standby power indicator

18

PCI Express x1 connector

 

 

connector (SLOT1)

 

(AUX_PWR_LED)

 

(SLOT2)

 

 

 

 

 

 

 

 

19

PCI connector

20

PCI connector (SLOT4)

21

password jumper (PSWD)

 

 

(SLOT3)

 

 

 

 

 

22

floppy drive

 

 

 

 

 

 

connector

 

 

 

 

 

 

(FLOPPY1)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Power Supply DC Connector Pin Assignments

DC Power Connector P1

Pin Number

Signal name

18-AWG Wire

 

 

 

1

+3.3 VDC

Orange

 

 

 

2

+3.3 VDC

Orange

 

 

 

3

GND

Black

 

 

 

4

+5 VDC

Red

 

 

 

5

GND

Black

 

 

 

6

+5 VDC

Red

 

 

 

Page 61
Image 61
Dell E521 specifications Power Supply DC Connector Pin Assignments, Pin Number Signal name AWG Wire