Chapter 1 Hardware Installation
39
Step 7 Attach Connectors,
Continued
J41 LCD Panel I2C header
J41 is a 4-pin berg connector connected by a cable to the LCD panel
on the chassis. The system communicates to the I2C device on the LCD panel
through this connector. The pinout is:
Pin
Description
1
I2C Clock
2
GND
3
I2C Data
4
GND
J28 Chassis Fan Header
J28 is a 26-pin dual-in-line berg connected by a cable to the chassis
fans, and the external battery backup. The internal circuitry monitors the state of
the chassis cooling fans, and the battery, and informs the administrator of any
failure. The +12V pins supply power to the fans, while the fan pins read the
tachometer lines of their respective fans. Up to eight fans can be monitored at a
time. The J28 pinout is:
Pin
Description
Pin
Description
1
Fan 0
2
GND
3
Fan 1
4
GND
5
Fan 2
6
GND
7
Fan 3
8
GND
9
Fan 4
10
GND
11
Fan 5
12
GND
13
Fan 6
14
External battery (+)
15
External battery (+)
16
+12V
17
+12V
18
+12V
19
GND
20
+12V
21
+12V
22
+12V
23
GND
24
+12V
25
Fan 7
26
+12V
Cont’d
Содержание MegaPlex II
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