DC Power Connections
Page 92 7705 SAR-8 Installation Guide
Note:
1. For D-Sub 2W2 connectors located on the 7705 SAR-8 chassis, the male pin is the positive (+) input terminal
and the female pin is the negative (-) input terminal.
Figure 23 and Figure 24 show the terminal connections for -48 VDC and +24 VDC
installations. Table 20 identifies the key items in both figures. The main difference between
the figures is the placement of the ground symbol and disconnect device.
Figure 22: DC Power Harness
1
2
2
1
19601
+ Vdc
Male
Female
Table 19: DC Power Connection Descriptions
Key Description
1 +VDC (female pin on power cable connector, black wire)
(1)
2 -VDC (male pin on power cable connector, blue wire)
Figure 23: Wiring the -48 VDC Power Supplies
Minor
Major
Critical
Batt B
Batt A
Fan
Alarm
External
Alarms
ACO/LT
FAN
7705 SAR-8
-
+
-
+
Batt. B
Batt. A
20239
2
+
_
3
+
_
1
4 5
4 5
1
+ VDC, black
- VDC, blue
+ VDC, black
- VDC, blue
To chassis,
Batt A
To chassis,
Batt B