Technical data

Fault Isolation 4-73
4.12.1 Main Power Distribution Cable Connectors
The main power distribution cable large connector’s pin numbers are the same as its
pins on the power supply board (see Figure 4-22). Its small connector’s pin numbers
are different than its pins on the power supply board (see Figure 4-23). Note that you
must check these voltages with the connectors attached to the power supply. Check the
voltages through the rear of the connectors.
Pin Voltage Pin Voltage
1
2
3
4
5
6
7
8
9
10
11
12
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Sense +
+ 5V
Ground
Ground
Sense –
13
14
15
16
17
18
19
20
21
22
23
24
+ 5 V
+ 5V
+ 5V
+ 5V
+ 5V
+ 5V
+ 5V
+ 5V
+ 5V
Iso 9V –
Iso 9V +
IntrLock
Figure 4-22. Model 400s System Unit Power Supply Large Cable Connector
Pin Voltage
1
2
3
4
5
6
7
8
9
10
11
12
+ 12 V
+ 12 V
Ground
Ground
Ground
NPU Reset
+ 12 V
+ 12 V
Ground
Ground
–12 V
–5 V
Figure 4-23. Model 400s System Unit Power Supply Small Cable Connector